Periodic Table – 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 set representing the correct order of ionic radius is ?

(1) $\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}>\mathrm{Be}^{2+}$

(2) $\mathrm{Mg}^{2+}>\mathrm{Be}^{2+}>\mathrm{Li}^{+}>\mathrm{Na}^{+}$

(3) $\mathrm{Li}^{+}>\mathrm{Be}^{2+}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}$

(4) $\mathrm{Na}^{+}>\mathrm{Li}^{+}>\mathrm{Mg}^{2+}>\mathrm{Be}^{2+}$

[AIEEE 2009]

Sol. (4)

Q. The correct order of electron gain enthalpy with negative sign of F, Cl, Br and I, having atomic number 9, 17, 35 and 53 respectively, is ?

(1) I > Br > Cl > F

(2) F > Cl > Br > I

(3) Cl > F > Br > I

(4) Br > Cl > I > F

[AIEEE 2011]

Sol. (3)

Q. The increasing order of the ionic radii of the given isoelectronic species is ?

(1) $\mathrm{K}^{+}, \mathrm{S}^{2-}, \mathrm{Ca}^{2+}, \mathrm{Cl}^{-}$

(2) $\mathrm{Cl}^{-}, \mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{S}^{2-}$

(3) $\mathrm{S}^{2-}, \mathrm{Cl}^{-}, \mathrm{Ca}^{2+}, \mathrm{K}^{+}$

(4) $\mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{Cl}^{-}, \mathrm{S}^{2-}$

[AIEEE 2012]

Sol. (4)

Q. Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar ?

(1) Ca < S < Ba < Se < Ar

(2) S < Se < Ca < Ba < Ar

(3) Ba < Ca < Se < S < Ar

(4) Ca < Ba S < Se < Ar

[JEE-Main 2013]

Sol. (3)

Q. The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of $\mathrm{Na}^{+}$ will be?

(1) – 2.55 eV

(2) – 5.1 eV

(3) – 10.2 eV

(4) + 2.55 eV

[JEE-Main 2013]

Sol. (4)

Q. Electron gain enthalpy with negative sign of fluorine is less than that of chlorine due to:

(1) Smaller size of chlorine atom

(2) Bigger size of 2p orbital of fluorine

(3) High ionization enthalpy ol fluorine

(4) Smaller size of fluorine atom

[JEE-MAIN 2013 (OnLine)]

Sol. (4)

Q. The order of increasing sizes of atomic radii among the elements O, S, Se and As is ?

(1) As < S < O < Se

(2) O < S < As < Se

(3) Se < S < As < O

(4) O < S < Se < As

[JEE-MAIN 2013 (OnLine)]

Sol. (4)

Q. Which is the correct order of second ionization potential of C, N, O and F in the following?

(1) O > F > N > C

(2) O > N > F > C

(3) C > N > O > F

(4) F > O > N > C

[JEE-MAIN 2013 (OnLine)]

Sol. (1)

Q. Which of the following series correctly represents relations between the elements from X to Y ?

[JEE-MAIN 2014 (OnLine)]

Sol. (3)

Q. Which of the following atoms has the highest first ionization energy ?

(1) Sc

(2) Rb

(3) Na

(4) K

[JEE-MAIN 2016]

Sol. (1)

Due to poor shielding of d-electrons in Sc, $Z_{\mathrm{eff}}$ of Sc becomes more so that ionisation energy of Sc is more than Na, K and Rb.

Q. The group having isoelectronic species is :-

(1) $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$

(2) $\mathrm{O}^{-}, \mathrm{F}^{-}, \mathrm{Na}, \mathrm{Mg}^{+}$

(3) $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}, \mathrm{Mg}^{2+}$

(4) $\mathrm{O}^{-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$

[JEE-MAIN 2017]

Sol. (1)