Chemical Bonding – JEE Main Previous Year Questions with Solutions
JEE Main Previous Year Papers Questions of Chemistry With Solutions are available at eSaral. Simulator   Previous Years AIEEE/JEE Mains Questions
Q. The bond dissociation energy of B–F in $\mathrm{BF}_{3}$ is 646 kJ $\mathrm{mol}^{-1}$whereas that of C–F in $\mathrm{CF}_{4}$ is 515 kJ mol–1. The correct reason for higher B–F bond dissociation energy as compared to that of C–F is :- (1) Significant $\mathrm{p} \pi-\mathrm{p} \pi$ interaction between B and F in $\mathrm{BF}_{3}$whereas there is not possibility of such interaction between C and F in $\mathrm{CF}_{4}$. (2) Lower degree of p – p interaction between B and F in $\mathrm{BF}_{3}$ than that between C and F in $\mathrm{CF}_{4}$ (3)Smaller size of B-atom as compared to that of C-atom (4) Stronger  bond between B and F in $\mathrm{BF}_{3}$ as compared to that between C and F in $\mathrm{CF}_{4}$ [AIEEE-2009]

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Sol. (1) Due to back bonding in BF3 molecule all B–F bond having partial double bond character.

Q. Using MO theory predict which of the following species has the shortest bond length ? (1) $\mathrm{o}_{2}^{-}$ (2) $\mathrm{O}_{2}^{2-}$ (3) $\mathrm{O}_{2}^{2+}$ (4) $\mathrm{O}_{2}^{+}$ [AIEEE-2009]

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Sol. (3)

Q. The hybridisation of orbitals of N atom in $\mathrm{NO}_{3}^{-}, \mathrm{NO}_{2}^{+}$ and $\mathrm{NH}_{4}^{+}$ are respectively:- [AIEEE-2011]

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Sol. (4)

Q. The structure of $\mathrm{IF}_{7}$ is :- (1) octahedral (2) pentagonal bipyramid (3) square pyramid (4) trigonal bipyramid [AIEEE-2011]

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Sol. (2)

Q. Among the following the maximum covalent character is shown by the compound :- (1) $\mathrm{AlCl}_{3}$ (2) $\mathrm{MgCl}_{2}$ (3) FeCl $_{2}$ (4) $\mathrm{SnCl}_{2}$ [AIEEE-2011]

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Sol. (1) $\mathrm{Al}^{+3}$ having highest polarizing power than other : having greater covalent character

Q. Which of the following has maximum number of lone pairs associated with Xe (1) $\mathrm{XeO}_{3}$ (2) $\mathrm{XeF}_{4}$ (3) XeF $_{6}$ (4) $\mathrm{XeF}_{2}$ [AIEEE-2011]

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Sol. (4)

Q. The number of types of bonds between two carbon atoms in calcium carbide is :- (1) One sigma, two pi (2) One sigma, one pi (3) Two sigma, one pi (4) Two sigma, two pi [AIEEE-2011]

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Sol. (1) $\mathrm{Ca}^{+2}(\mathrm{C} \equiv \mathrm{C})^{2-}$

Q. The molecule having smallest bond angle is :- (1) $\mathrm{PCl}_{3}$ (2) $\mathrm{NCl}_{3}$ (4) $\mathrm{SbCl}_{3}$ [AIEEE-2012]

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Sol. (4) Bond angle order $\mathrm{NCl}_{3}>\mathrm{PCl}_{3}>\mathrm{AsCl}_{3}>\mathrm{SbCl}_{3}$

Q. In which of the following pairs the two species are not isostructural ? (1) $\mathrm{AIF}_{6}^{3-}$ and $\mathrm{SF}_{6}$ (3) $\mathrm{CO}_{3}^{2-}$ and $\mathrm{NO}_{3}^{-}$ (3) $\mathrm{PCl}_{4}^{+}$ and $\mathrm{SiCl}_{4}$ (4) $\mathrm{PF}_{5}$ and $\mathrm{BrF}_{5}$ [AIEEE-2012]

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Sol. (4)

Q. The number of S–S bonds in $\mathrm{SO}_{3}, \mathrm{S}_{2} \mathrm{O}_{3}^{2-}, \mathrm{S}_{2} \mathrm{O}_{6}^{2-}$ and $\mathrm{S}_{2} \mathrm{O}_{8}^{2-}$ respectively are :- (1) 1, 0, 1, 0 (2) 0, 1, 1, 0 (3) 1, 0, 0, 1 (4) 0, 1, 0, 1 [JEE-MAINS(Online) 2012]

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Sol. (2)

Q. Dipole moment is shown by :- (1) trans-2, 3-dichloro- 2-butene (2) 1, 2-dichlorobenzene (3) 1, 4-dichlorobenzene (4) trans-1, 2-dinitroethene [JEE-MAINS(Online) 2012]

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Sol. (2)

Q. Among the following species which two have trigonal bipyramidal shape ? [JEE-MAINS(Online) 2012]

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Sol. (Bonus)

Q. Among the following, the species having the smallest bond is :- (1) NO (2) $\mathrm{NO}^{+}$ (3) $\mathrm{O}_{2}$ (4) $\mathrm{NO}^{-}$ [JEE-MAINS(Online) 2012]

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Sol. (2)

Q. Based on lattice energy and other considerations, which one of the following alkali metal chloride is expected to have the highest melting point ? (1) RbCl (2) LiCl (3) KCl (4) NaCl [JEE-MAINS(Online) 2012]

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Sol. (4) Highest melting is of NaCl

Q. Which of the following has the square planar structure :- (1) $\mathrm{NH}_{4}^{+}$ (2) $\mathrm{CCl}_{4}$ (3) $\mathrm{XeF}_{4}$ (4) $\mathrm{BF}_{4}^{-}$ [JEE-MAINS(Online) 2012]

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Sol. (3) Hybridisation $\mathrm{Sp}^{3} \mathrm{d}^{2}$ Shape – square planar

Q. The compound of Xenon with zero dipole moment is :- (1) $\mathrm{XeO}_{3}$ (2) $\mathrm{XeO}_{2}$ (3) $\mathrm{XeF}_{4}$ (4) $\mathrm{XeOF}_{4}$ [JEE-MAINS(Online) 2012]

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Sol. (3)

Q. Among the following the molecule with the lowest dipole moment is :- (1) $\mathrm{CHCl}_{3}$ (2) $\mathrm{CH}_{2} \mathrm{Cl}_{2}$ (3) $\mathrm{CCl}_{4}$ (4) $\mathrm{CH}_{3} \mathrm{Cl}$ [JEE-MAINS(Online) 2012]

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Sol. (3) $\mathrm{CCl}_{4}<\mathrm{CHCl}_{3}<\mathrm{CH}_{2} \mathrm{Cl}_{2}<\mathrm{CH}_{3} \mathrm{Cl}(\text { Dipolar moment })$

Q. The formation of molecular complex $\mathrm{BF}_{3}-\mathrm{NH}_{3}$ results in a change in hybridisation of boron (1) from $\operatorname{sp}^{3}$ to $\mathrm{sp}^{3} \mathrm{d}$ (2) from $\operatorname{sp}^{2}$ to $\mathrm{dsp}^{2}$ (3) from $\operatorname{sp}^{3}$ to $\mathrm{sp}^{2}$ (4) from $\operatorname{sp}^{2}$ to $\mathrm{sp}^{3}$ [JEE-MAINS(Online) 2012]

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Sol. (4)

Q. Among the following chloro-compound having the lowest dipole moment is :- (1) $\mathrm{CH}_{2} \mathrm{Cl}_{2}$ (2) $\mathrm{CH}_{3} \mathrm{Cl}$ (3) (4)

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Sol. (1) $\mathrm{CH}_{2} \mathrm{Cl}_{2}$ has lowest dipole moment

Q. Which one of the following molecules is expected to exhibit diamagnetic behaviour ? (1) $\mathrm{C}_{2}$ (2) $\mathrm{N}_{2}$ (3) $\mathrm{O}_{2}$ (4) $\mathrm{S}_{2}$ [AIEEE-2013]

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Sol. (2) $\mathrm{N}_{2}$ is diamagnetic

Q. Which of the following is the wrong statement? (1) ONCl and $\mathrm{ONO}^{-}$ are not isoelectronic (2) $\mathrm{O}_{3}$ molecule is bent (3) Ozone is violet-black in solid state (4) Ozone is diamagnetic gas [JEE-maIN 2013]

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Sol. (1) Number of electron in ONCl an $\mathrm{ONO}^{-}$ is 32 & 24 respectively.

Q. In which of the following pairs of molecules/ions, both the species are not likely to exist ? (1) $\mathrm{H}_{2}^{+}, \mathrm{He}_{2}^{2-}$ (2) $\mathrm{H}_{2}^{-}, \mathrm{He}_{2}^{2-}$ (3) $\mathrm{H}_{2}^{2+}, \mathrm{He}_{2}$ (4) $\mathrm{H}_{2}^{-}, \mathrm{H} \mathrm{e}_{2}^{2+}$ [JEE-main 2013]

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Sol. (3) Bond order of $\mathrm{H}_{2}^{2+} \& \mathrm{He}_{2}$ is zero i.e. these molecule do not exist.

Q. Stability of the species $\mathrm{Li}_{2}, \quad \mathrm{Li}_{2}^{-}$ and $\mathrm{Li}_{2}^{+}$ increases in the order of :- (1) $\mathrm{Li}_{2}<\mathrm{Li}_{2}^{+}<\mathrm{Li}_{2}^{-}$ (2) $\mathrm{Li}_{2}^{-}<\mathrm{Li}_{2}^{+}<\mathrm{Li}_{2}$ (3) $\mathrm{Li}_{2}<\mathrm{Li}_{2}<\mathrm{Li}_{2}^{+}$ (4) $\mathrm{Li}_{2}^{-}<\mathrm{Li}_{2}<\mathrm{Li}_{2}^{+}$ [JEE-main 2013]

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Sol. (2)

Q. Trigonal bipyramidal geometry is shown by: (1) $\mathrm{XeO}_{3} \mathrm{F}_{2}$ (2) $\mathrm{XeOF}_{2}$ (3) $\left[\mathrm{XeF}_{8}\right]^{2-}$ [JEE-MAINS(Online) 2013]

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Sol. (1)

Q. In which of the following ionization processes the bond energy has increased and also the magnetic behaviour has changed from paramagnetic to diamagnetic ? (1) $\mathrm{NO} \rightarrow \mathrm{NO}^{+}$ (2) $\mathrm{O}_{2} \rightarrow \mathrm{O}_{2}^{+}$ (3) $\mathrm{N}_{2} \rightarrow \mathrm{N}_{2}^{+}$ ( 4) $\mathrm{C}_{2} \rightarrow \mathrm{C}_{2}^{+}$ [JEE-MAINS(Online) 2013]

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Sol. (1)

Q. Which one of the following molecules is polar? (1) $\mathrm{CF}_{4}$ (2) $\mathrm{SbF}_{5}$ (3) $\mathrm{IF}_{5}$ (4) $\mathrm{XeF}_{4}$ [JEE-MAINS(Online) 2013]

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Sol. (3)

Q. Oxidation state of sulphur in anions $\mathrm{SO}_{3,}^{2-} \mathrm{S}_{2} \mathrm{O}_{4}^{2-}$ and $\mathrm{S}_{2} \mathrm{O}_{6}^{2-}$ increases in the orders : (1) $\mathrm{S}_{2} \mathrm{O}_{6}^{2-}<\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{SO}_{3}^{2-}$ (2) $\mathrm{SO}_{3}^{2-}<\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{S}_{2} \mathrm{O}_{6}^{2-}$ (3) $\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{SO}_{3}^{2-}<\mathrm{S}_{2} \mathrm{O}_{6}^{2-}$ (4) $\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{S}_{2} \mathrm{O}_{6}^{2-}<\mathrm{SO}_{3}^{2-}$ [JEE-MAINS(Online) 2013]

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Sol. (3)

Q. Bond order normally gives idea of stability of a molecular species. All the molecules viz. $\mathrm{H}_{2}, \mathrm{Li}_{2}$ and $\mathrm{B}_{2}$ have the same bond order yet they are not equally stable. Their stability order is: (1) $\mathrm{Li}_{2}>\mathrm{H}_{2}>\mathrm{B}_{2}$ (2) $\mathrm{H}_{2}>\mathrm{B}_{2}>\mathrm{Li}_{2}$ (3) $\mathrm{B}_{2}>\mathrm{H}_{2}>\mathrm{Li}_{2}$ (4) $\mathrm{Li}_{2}>\mathrm{B}_{2}>\mathrm{H}_{2}$ [JEE-MAINS(Online) 2013]

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Sol. (2)

Q. The solubility order for alkali metal fluoride in water is : (1) $\mathrm{LiF}<\mathrm{NaF}<\mathrm{KF}<\mathrm{RbF}$ (2) $\mathrm{LiF}>\mathrm{NaF}>\mathrm{KF}>\mathrm{RbF}$ (3) $\mathrm{RbF}<\mathrm{KF}<\mathrm{NaF}<\mathrm{LiF}$ (4) $\mathrm{LiF}<\mathrm{RbF}<\mathrm{KF}<\mathrm{NaF}$ [JEE-MAINS(Online) 2013]

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Sol. (1) Solubility order LiF < NaF < KF < RbF

Q. $\mathrm{XeO}_{4}$ molecule is tetrahedral having : (1) Two p $\pi$ -d $\pi$ bonds (2) Four p $\pi$ – d $\pi$ bonds (3) One $\mathrm{p} \pi-\mathrm{d} \pi$ bond (4) Three p $\pi$ -d $\pi$ bonds [JEE-MAINS(Online) 2013]

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Sol. (2)

Q. Bond distance in HF is 9.17 × $10^{-11}$ m. Dipole moment of HF is 6.104 × 10–30 Cm. The percent ionic character in HF will be : (electron charge = 1.60 × $10^{-19}$ C) (1) 61.0% (2) 38.0% (3) 35.5% (4) 41.5% [JEE-MAINS(Online) 2013]

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Sol. (4)

Q. The shape of $\mathrm{IF}_{6}^{-}$ is : (1) Trigonally distorted octahedron (2) Pyramidal (3) Octahedral (4) Square antiprism [JEE-MAINS(Online) 2013]

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Sol. (1)

Q. Which has trigonal bipyramidal shape ? (1) $\mathrm{XeOF}_{4}$ (2) $\mathrm{XeO}_{3}$ (3) $\mathrm{XeO}_{3} \mathrm{F}_{2}$ (4) $\mathrm{XeOF}_{2}$ [JEE-MAINS(Online) 2013]

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Sol. (3)

Q. The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ $\mathrm{mol}^{-1}$) of C — C, Si —Si and Ge—Ge bonds are respectively : (1) 348, 260, 297 (2) 348, 297, 260 (3) 297, 348, 260 (4) 260, 297, 348 [JEE-MAINS(Online) 2013]

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Sol. (2) Catenation/Bond energy order C – C > Si – Si > Ge – Ge

Q. In which of the following sets, all the given species are isostructural ? (1) $\mathrm{BF}_{3}, \mathrm{NF}_{3}, \mathrm{PF}_{3}, \mathrm{AlF}_{3}$ (2) $\mathrm{PCl}_{3}, \mathrm{AlCl}_{3}, \mathrm{BCl}_{3}, \mathrm{SbCl}_{3}$ (3) $\mathrm{BF}_{4}^{-}, \mathrm{CCl}_{4}, \mathrm{NH}_{4}^{+}, \mathrm{PCl}_{4}^{+}$ (4) $\mathrm{CO}_{2}, \mathrm{NO}_{2}, \mathrm{ClO}_{2}, \mathrm{SiO}_{2}$ [JEE-MAINS(Online) 2013]

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Sol. (3) $\mathrm{BF}_{4}^{-}, \mathrm{CC}_{4}, \mathrm{NH}_{4}^{+}, \mathrm{PCl}_{4}^{+}$ are terahedral

Q. The internuclear distances in O —O bonds for O, $\mathrm{O}_{2}, \mathrm{O}^{-}$2 and O respectively are : (1) 1.49 Å, 1.21 Å, 1.12 Å, 1.30 Å (2) 1.30 Å, 1.49 Å, 1.12 Å, 1.21 (3) 1.12 Å, 1.21 Å, 1.30 Å, 1.49 Å (4) 1.21 Å, 1.12 Å, 1.49 Å, 1.30 Å [JEE-MAINS(Online) 2013]

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Sol. (3)

Q. Which one of the following properties is not shown by NO ? (1) It combines with oxygen to form nitrogen dioxide (2) It’s bond order is 2.5 (3) It is diamagnetic in gaseous state (4) It is a neutral oxide [JEE-main 2014]

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Sol. (3)

Q. For which of the following molecule significant $\mu \neq 0$ [JEE-main 2014]

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Sol. (2)

Q. The number and type of bonds in $\mathrm{C}_{2}^{2-} \mathrm{ion}$ in $\mathrm{CaC}_{2}$ are: (1) Two $\sigma$ bonds and one $\pi-$ bond (2) Two $\sigma$ bonds and two $\pi-$ bonds (3) One $\sigma$ bond and two $\pi-$ bonds (4) One $\sigma$ bond and one $\pi-$ bond [JEE-MAINS(Online) 2014]

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Sol. (3)

Q. For the compounds $\mathrm{CH}_{3} \mathrm{Cl}, \mathrm{CH}_{3} \mathrm{Br}, \mathrm{CH}_{3} \mathrm{I}$ and $\mathrm{CH}_{3} \mathrm{F}$ (1) $\mathrm{CH}_{3} \mathrm{F}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{Cl}<\mathrm{CH}_{3} \mathrm{I}$ (2) $\mathrm{CH}_{3} \mathrm{F}<\mathrm{CH}_{3} \mathrm{Cl}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{I}$ (3) $\mathrm{CH}_{3} \mathrm{Cl}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{F}<\mathrm{CH}_{3} \mathrm{I}$, the correct order of increasing C-halogen bond length is : (4) $\mathrm{CH}_{3} \mathrm{F}<\mathrm{CH}_{3} \mathrm{I}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{Cl}$ [JEE-MAINS(Online) 2014]

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Sol. (2)

Q. Which of the following has unpaired electron(s) ? (1) $\mathrm{O}_{2}^{-}$ (2) $\mathrm{N}_{2}^{2+}$ (3) $\mathrm{O}_{2}^{2-}$ (4) $\mathrm{N}_{2}$ [JEE-MAINS(Online) 2014]

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Sol. (1) $\mathrm{O}_{2}^{-}$ ha one unpaired electron

Q. In allene $\left(\mathrm{C}_{3} \mathrm{H}_{4}\right)$, the type(s) of hybridization of the carbon atoms is (are): (1) only sp $^{2}$ (2) $\mathrm{sp}^{2}$ and $\mathrm{sp}$ (3) sp and sp $^{3}$ (4) $\mathrm{sp}^{2}$ and $\mathrm{sp}^{3}$ [JEE-MAINS(Online) 2014]

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Sol. (2)

Q. Shapes of certain interhalogen compounds are stated below. Which one of them is not correctly stated? (1) IF $_{7}:$ Pentagonal bipyramid (2) BrF $_{5}:$ Trigonal bipyramid (4) $\mathrm{BrF}_{3}:$ Planar T-shaped [JEE-MAINS(Online) 2014]

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Sol. (2) $\mathrm{BrF}_{5}$ have square pyramidal shape.

Q. The correct order of bond dissociation energy among $\mathrm{N}_{2}, \mathrm{O}_{2}, \mathrm{o}_{2}^{-}$ is shown in which of the following arrangements? (1) $\mathrm{N}_{2}>\mathrm{O}_{2}>\mathrm{O}_{2}^{-}$ (2) $\mathrm{O}_{2}>\mathrm{O}_{2}^{-}>\mathrm{N}_{2}$ (3) $\mathrm{N}_{2}>\mathrm{O}_{2}^{-}>\mathrm{O}_{2}$ (4) $\mathrm{O}_{2}^{-}>\mathrm{O}_{2}>\mathrm{N}_{2}$ [JEE-MAINS(Online) 2014]

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Sol. (1)

Q. Which of the following molecules has two sigma$(\sigma)$ and two $\operatorname{pi}(\pi)$ bonds :- (1) HCN (2) $\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{Cl}_{2}$ (3) $\mathrm{N}_{2} \mathrm{F}_{2}$ (4) $\mathrm{C}_{2} \mathrm{H}_{4}$ [JEE-MAINS(Online) 2014]

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Sol. (1)

Q. Which one of the following molecules is paramagnetic? (1) NO ( 2) $\mathrm{O}_{3}$ (3) $\mathrm{N}_{2}$ (4) CO [JEE-MAINS(Online) 2014]

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Sol. (1) NO has unpaired e $^{-} \therefore$ paramagnetic is nature

Q. Amongst LiCl, RbCl, $\mathrm{BeCl}_{2}$ and $\mathrm{MgCl}_{2}$ the compounds with the greatest and the least ionic character, respectively are : (1) $\mathrm{RbCl}$ and $\mathrm{MgCl}_{2}$ (2) LiCl and RbCl (3) $\mathrm{MgCl}_{2}$ and $\mathrm{BeCl}_{2}$ (4) $\mathrm{RbCl}$ and $\mathrm{BeCl}_{2}$ [JEE-MAINS(Online) 2014]

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Sol. (4) RbCl has highest ionic & and $\mathrm{BeCl}_{2}$ is most covalent

Q. The species in which the N atom is in a state of sp hybridization is :- (1) $\mathrm{NO}_{2}$ (2) $\mathrm{NO}_{2}^{+}$ (3) $\mathrm{NO}_{2}^{-}$ (4) $\mathrm{NO}_{3}^{-}$ [JEE-MAINS 2016]

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Sol. (2)

Q. Which of the following species is not paramagnetic :- (1)NO (2) CO (3) $\mathrm{O}_{2}$ (4) $\mathrm{B}_{2}$ [JEE-MAINS 2017]

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Sol. (2)

Q. Total number of lone pair of electrons in $\mathrm{I}_{3}^{-} \mathrm{ion}$ is (1) 6 (2) 9 (3) 12 (4) 3 [JEE-MAINS 2018]

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Sol. (2)

Q. According to molecular orbital theory, which of the following will not be a viable molecule ? (1) $\mathrm{He}_{2}^{+}$ (2) $\mathrm{H}_{2}^{-}$ (3) $\mathrm{H}_{2}^{2-}$ (4) $\mathrm{He}_{2}^{2+}$ [JEE-MAINS 2018]

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Sol. (3)

Q. Which of the following compounds contain(s) no covalent bond(s) ? $\mathrm{KCl}, \mathrm{PH}_{3}, \mathrm{O}_{2}, \mathrm{B}_{2} \mathrm{H}_{6}, \mathrm{H}_{2} \mathrm{SO}_{4}$ $(1) \mathrm{KCl}, \mathrm{H}_{2} \mathrm{SO}_{4}$ (2) KC1 (3) $\mathrm{KCl}, \mathrm{B}_{2} \mathrm{H}_{6}$ (4) $\mathrm{KCl}, \mathrm{B}_{2} \mathrm{H}_{6}, \mathrm{PH}_{3}$ [JEE-MAINS 2018]

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Sol. (2)

Circular Motion Notes Class 11th
Rotational Motion
System of Particles and Rotational Motion Class 11 Notes for IIT JEE & NEET
System of Particles and Rotational Motion Class 11 is one of the important chapters when it comes to understanding the basics of circular motion. We all are aware of the definition of rotational motion, the center of mass and center of gravity etc.Rotational motion refers to objects that are rotating in a curved path and comprises torque, moment of inertia, angular velocity, angular displacement, angular acceleration and angular momentum. System of Particles and Rotational Motion Class 11 notes are given below: System of Particles and Rotational Motion Class 11 Physical significance of Moment of Inertia System of Particles and Rotational Motion questions with solutions transational motion and rotational motion eSaral have already come up with an amazing revision series of Physics where you can easily revise your chapter within minutes with all the important formulae and key points. This revision series is free for all. Click Here for Complete Physics Revision Series by Saransh Gupta Sir (AIR-41) About Saransh Gupta Sir Computer Science Graduate from IIT Bombay. Cracked IIT-JEE with AIR-41 and AIEEE (JM) with AIR-71 in 2006. He is an author of JEE Mentorship Book “StrateJEE”. He taught Physics for 5 years at Allen and was loved immensely by all the students. Many of his students bagged success with flying colours in JEE & NEET Exams. eSaral brings you detailed Class 11th Physics study material.  eSaral provides a series of detailed chapter wise notes for all the Subjects of class 11th and 12th.  These notes will also help you in your IIT JEE & NEET preparations. We hope these Physics Notes for Class 11 will help you understand the important topics and remember the key points for the exam point of view. Get Complete Physics Notes for Physics Class 11 for easy learning and understanding. For free video lectures and complete study material, Download eSaral APP. About eSaral At eSaral we are offering a complete platform for IIT-JEE & NEET preparation. The main mission behind eSaral is to provide education to each and every student in India by eliminating the Geographic and Economic factors, as a nation’s progress and development depends on the availability of quality education to each and every one. With the blend of education & technology, eSaral team made the learning personalized & adaptive for everyone.
Work, Energy and Power
Work Energy and Power Class 11 Physics Notes for IIT JEE | NEET

This article contains Work Energy and Power Class 11 Physics Notes.

Work Energy and Power can never be ignored as it covers basic concepts which provides a smooth access to the next some topics in Mechanics. This chapter is a key to prepare for entrance examinations like IIT-JEE & NEET. This is one of the most important topic in mechanics for IIT-JEE, NEET and CBSE perspectives. The terms work, energy and power have specific meanings in Physics. Work is done when a force produces motion. To do work, energy is required. This energy we acquire from the food which we eat and if work is done by machine, then energy is supplied by fuels or by current.

There are various forms of energy – kinetic energy, potential energy, heat energy, chemical energy, electrical energy, nuclear energy etc. Work Energy and Power Class 11 Physics notes  are given here:

  work energy and power class 11 notes Click Here to Study Newton Laws of Motion Class 11th To watch free video tutorials on Physics topics by Saransh Sir, AIR-41 Install eSaral App   eSaral have already come up with an amazing revision series of Physics where you can easily revise your chapter within minutes with all the important formulae and key points. This revision series is free for all. Click Here for Complete Physics Revision Series by Saransh Gupta Sir (AIR-41) About Saransh Gupta Sir Computer Science Graduate from IIT Bombay. Cracked IIT-JEE with AIR-41 and AIEEE (JM) with AIR-71 in 2006. He is an author of JEE Mentorship Book “StrateJEE”. He taught Physics for 5 years at Allen and was loved immensely by all the students. Many of his students bagged success with flying colours in JEE & NEET Exams. eSaral brings you detailed Class 11th Physics study material.  eSaral provides a series of detailed chapter wise notes for all the Subjects of class 11th and 12th.  These notes will also help you in your IIT JEE & NEET preparations. We hope these Physics Notes for Class 11 will help you understand the important topics and remember the key points for the exam point of view. Get Complete Physics Notes for Physics Class 11 for easy learning and understanding. For free video lectures and complete study material, Download eSaral APP. About eSaral At eSaral we are offering a complete platform for IIT-JEE & NEET preparation. The main mission behind eSaral is to provide education to each and every student in India by eliminating the Geographic and Economic factors, as a nation’s progress and development depends on the availability of quality education to each and every one. With the blend of education & technology, eSaral team made the learning personalized & adaptive for everyone.
Score-good-in-JEE Mains-Exam
Tips to Score Maximum Marks in JEE Mains Exam

To get into IIT is the dream of every JEE Aspirant. Most of them started preparing for JEE from foundation classes while some realises their interest and inclination towards engineering after class 10th. Now for the aspirants who are preparing for 2020, few months left for JEE-Mains 2019. Many students started worrying on how to score good marks in JEE mains exam. During this time of preparation, aspirants have many more questions in their mind, Such as:

  • How to improve marks during mock test
  • How to score above 300 marks in JEE mains
  • How to attempt questions to score well in JEE mains
  • Where to practice JEE mains mock Test.
  • Where to get online test series for JEE Mains.

If you are seeking answer for any of the question above, then this article is for you!!

From last year, NTA (National Testing Agency) is conducting JEE Exam. From 2019 JEE mains exam held twice in year. In January and April.

Lot of hard work and practice is required to get a good score in JEE.

To score well in JEE mains, focus more on your learning & basic understanding of the concepts of Physics, Chemistry, and Mathematics. Click to watch Exam Pattern of JEE mains.

How to Study Physics for JEE Mains

Start with the basic concepts of Physics. Then memorize all the important Physics formulas for JEE Mains.

Practice makes everyone perfect so, practice questions more and more. Also practice previous year’s questions to make an idea on the question patterns that will appear in JEE mains. By practicing previous year questions, you will also get to know the most important chapters in JEE mains Physics. This will also help in strengthening your concepts and will make you familiar with a variety of questions asked in the exam.

Practice Mock Test on regular basis to improve score.

Don’t be overconfident. Sometimes it make mistakes if the question seems easy. Mostly mistakes are made in unit system where student ignore the difference between CGS and MKS systems. So, be easy-going and have the presence of mind while solving the problems.

How to Study Chemistry for JEE Mains

Chemistry comprises of three sections i.e., Physical Chemistry, Inorganic Chemistry and Organic Chemistry. The numerical questions are asked only from Physical Chemistry. Chemistry is a scoring subject in JEE mains Exam as the difficulty level of the questions in Chemistry is easier than the other two subjects i.e., Physics and Mathematics. That’s why, Chemistry is the easiest part of the JEE Main Examination for many students.

Learn all important formulas in Physical Chemistry which will help you to solve numerical problems in less time in JEE Main Examination 2020.

Don’t be overconfident. Chemistry is the easiest part of the JEE Examination. Therefore, some students did not give sufficient time to Chemistry subject. As a result, they score less marks in JEE Main Examination. They think that they can learn the complete subject within a month which is not possible.

How to study Mathematics for JEE Mains

For most of the aspirants, Math is one of the toughest subject among all three. Mostly, performance of JEE mains aspirants are affected by fear of mathematics.

To cope up with the fear of math, there is only one solution. Practice! Practice! And Practice! You can also make an actionable study plan to conquer the JEE Mains Mathematics Preparation.

An Ideal rule of solving mathematics problem is that never start with a challenging problem. If you can’t solve few basic problems, it will make you nervous & hence it will distress your complete performance in JEE Mains paper.

Solve the easier mathematical problems first & then progress towards the challenging ones.

The more you practice Mathematics, the less you make mistakes while solving problems and hence you will get good score in the JEE Mains.

Take mock tests and practice previous year questions to get first real look and feel of the examination. JEE Mains mock tests provide good practice and are a guide to judge your abilities. You can get mock test at eSaral app. eSaral also provides Topic-wise tests and offers more than 5 lakh questions to practice. For more details Click here.

It has been observed from the toppers talk that mock tests during exam preparation helped them a lot in managing time as well as scoring well in JEE mains exam paper. Hence Mock tests plays an important role in scoring good marks.

Finally, I would like to say have faith in yourself and be confident on your learning and preparation for JEE exam. Focus on every subject individually to score well.

Hope you liked reading the above post. Please share it with your friends to help them in getting the relevant information. Stay motivated and keep learning from eSaral!!!

Avoid-Distraction-While-studying
How to Avoid Distractions While studying?
Distraction is everywhere around us. Here we will get to know about How to avoid distractions while studying and how to focus on our goal. Let’s think about the time when you were “lost” in something you enjoy:  music, a good game, a sport, or a movie. It is not surprising to know that students spending more time unreasonably in unwanted things, that cause distraction rather than pursuing their careers. As per the survey it has been observed that an average person checks/unlocks her cell phone 110 times in a day. Those who falls under the category of addiction, they checks their phone up to 900 times in a day. Even most of the phone addicts experiences false vibrations. Smart phones not only causes distraction in studies but also affects health and may cause long-term, incurable Side effects. Nearby 63% of smartphone users of age 16-25 fall asleep with a cell phones.  Instead of making us more connected, smartphones could be making us more isolated. From age 14-22, around 52% of the students spending more than 4 hours a day on electronic gadgets and get improper sleep, that is causing long term high B.P. and weigh gain. In which 27% of them are at high risk of depression. 86% of smartphone users will check their device while speaking with friends and family. Research study has shown that most of the student are facing problems in concentration. While studying and they blame out to the outside distractions for their problem. But the main root of distraction is lack of passion, Interest and determination. It is because knowingly or unknowingly, students are indulging themselves in unwanted thoughts. Distractions that hinders their output and hamper their careers in the long run. For IIT-JEE or NEET aspirant, you must avoid distractions during your preparation. Because it is a golden period of your life. Your hard work towards your goal will decide better future for you. So, stay focused and avoid unwanted thoughts. To crack IIT-JEE and NEET, an aspirant need to be completely focus on your preparation and avoid distractions while studying. There are majorly two main causes of distraction among students:  
  1. Mobile Phones
  2. Unwanted Gossips
The major cause of distraction considered among students nowadays is ‘Smart Phone’. According to research, it has been observed that Mobile phone is as addictive as Alcohol& tobacco. But in actual Phone is not an addiction. The things inside the phones are addictive such as social networking sites & applications as such as Instagram, Facebook, What’s app.
The people around you are also responsible in your success. So, choose your friends wisely. Choose the peoples that helps you in achieving your goal. Don’t involve in irrelevant & unwanted gossips. Try to escape your time from unwanted things and be focused in your exam preparation and get rid of any fuss to avoid distraction while studying. Follow some steps to avoid mobile phone while studying You can delete the addictive apps from your phone. If that’s too radical, move them off the main screen or into a folder that’s out of sight. You can also put your mobile phone on grey scale so you aren’t as enchanted by the colorful graphics. Turn off notifications & delete unnecessary apps from mobile phone to reduce distraction while studying. While studying Keep your mobile data off. This will help you to keep away the unwanted notification. This will also helps in avoiding unwanted thoughts while studying. But Mobile phone became necessary part of our life. So firstly we must keep in mind that Mobile phones must be used to increase productivity not to waste time. The main thing behind this is that you’re controlling your phone or the phone is controlling you. That makes the main difference.   You can also do one thing to stop getting distracted while studying is- Setting up reminder for every 30 minutes Generally we do not think of getting distracted, it occurs automatically right? You cannot learn to focus in One day night! So, this will help you to check after every 30 minutes or accordingly that you are studying in actual or just staring at the textbook and thinking about some irrelevant situation. For students who also want to increase their study outputs, there is an amazing video by Saransh Gupta Sir. He has revealed some wonderful tips to increase study hours and also to increase study output. Eventually this will also help you to avoid distractions while studying. Watch How to increase self-study output. Saransh Gupta Sir is the founder of eSaral and secured AIR-41 in IIT-JEE 2006. He has encouraged and motivated thousands of students during their IIT-JEE & NEET preparation. To watch out Physics tutorials for free by Saransh Sir, Download eSaral for IIT-JEE & NEET  preparation. With eSaral, prepare for IIT-JEE & NEET at your place without getting distracted. eSaral provides a tab consisting all the study material, video lectures, doubt clearing session, and more related to your preparation. eSaral Tab comprises an amazing feature, that a student can access only his study material in that tab. The tab is totally locked to use other sites such as Facebook, Instagram, etc. That will help him to get rid of distractions while studying. Click Here for more Information.      
How to Wake Up Early in the Morning for study
How to wake up early in the morning for study
We all want to wake up early, but most of us end up failing in this desire. Do you also have the same desire and you want to wake up early in the morning, but you do not know how? As you know that the time before the dawn covers most hours of the day. Every morning there are two opportunities for you: Continuing sleep with dreams. OR Wake up early to chase your dreams. The choice is yours only. Waking up early in the morning will help you in maintaining the sleep cycle. Thus, improves health. But also a good night’s sleep is extremely important for students to produce improved study outputs. Some other benefits to wake up early in the morning for students are:
  • Better concentration power.
  • The stress level is minimum.
  • Better Study Output.
  • Improves mental health.
  • Improves brain efficiency.
  • Less traffic, more peace.
But most of the students are concerned about on how to wake up in the early morning for study. Because they may be probably making some mistakes that are making difficult to wake up early for them. Such as:
  • Not having a regular sleep schedule.
  • Sleeping late in the night.
  • Drinking Caffeine during study hours.
  • Taking long naps instead of short naps.
  • Eating late at night.
  • Hitting snooze.
Saransh Gupta Sir, founder of eSaral has revealed some tips to wake up early in the morning. He mentored many students and the tips are proved to be useful in getting up early. So Guys, watch out the Video on How to wake up early in the morning by Saransh Sir.
He also talked about productive time for study in his previous video, where he talked about the benefits of early morning study for IIT JEE & NEET aspirants. If you haven’t watched the video, then watch the video on Early Morning or Late Night Study! Research study has also shown that morning time is the best time to study and memorize. So wake up early to make your dream come true. Here are some tips to help you in the fight & wake up early in the morning:
  • Get excited to wake up early: find a strong purpose to get up early morning.
  • Don’t put the alarm on the bed or near to the bed. Keep it at distance.
  • You can also find a wake-up partner to help you to wake up early in the morning.
  • Sleep at the right time to get proper sleep of 6-7 hours.
  • Do stretch your body after waking up. This will help you in activating blood circulation and also helps in reducing laziness.
  • Give 10-15 minutes to meditation or exercise to maintain the oxygen level.
  • Hydrate your body by drinking 2-3 glasses of water just after waking up.
So Guys, get a head start on the rest of the world by skipping the snooze button and outworking your competition. Because life has no remote, get up and change it yourself! For more videos related to Boards, IIT JEE & NEET preparation. Click Here.