Sodium stearate
Question: Sodium stearateanionic surfactant which forms micelles in oil. Choose the correct statement for it from the following :It forms spherical micelles with $\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{16}-$ group pointing towards the centre of sphere.It forms non-spherical micelles with $-\mathrm{COO}^{-}$ group pointing outwards on the surface.It forms spherical micelles with $\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{16}-$ group pointing outwards on the surface of sphereIt forms non-...
Read More →An organic compound is subjected to chlorination
Question: An organic compound is subjected to chlorination to get compound A using $5.0 \mathrm{~g}$ of chlorine. When $0.5 \mathrm{~g}$ of compound $\mathrm{A}$ is reacted with $\mathrm{AgNO}_{3}$ [Carius Method], the percentage of chlorine in compound $\mathrm{A}$ is___________ when it forms $0.3849 \mathrm{~g}$ of $\mathrm{AgCl}$. (Round off to the Nearest Integer) $\mathrm{AgCl}$. (Round off to the Nearest Integer) (Atomic masses of $\mathrm{Ag}$ and $\mathrm{Cl}$ are $107.87$ and $35.5$ res...
Read More →The set in which compounds
Question: The set in which compounds have different nature is :$\mathrm{B}(\mathrm{OH})_{3}$ and $\mathrm{H}_{3} \mathrm{PO}_{3}$$\mathrm{B}(\mathrm{OH})_{3}$ and $\mathrm{Al}(\mathrm{OH})_{3}$$\mathrm{NaOH}$ and $\mathrm{Ca}(\mathrm{OH})_{2}$$\mathrm{Be}(\mathrm{OH})_{2}$ and $\mathrm{Al}(\mathrm{OH})_{3}$Correct Option: , 2 Solution: 1) $\mathrm{B}(\mathrm{OH})_{3}$ acidic and $\mathrm{H}_{3} \mathrm{PO}_{3}$ acidic 2) $\mathrm{B}(\mathrm{OH})_{3}$ acidic and $\mathrm{Al}(\mathrm{OH})_{3}$ amp...
Read More →Which one of the following is the correct PV vs P plot
Question: Which one of the following is the correct PV vs P plot at constant temperature for an ideal gas ? (P and $\mathrm{V}$ stand for pressure and volume of the gas respectively)Correct Option: 1 Solution: $\mathrm{PV}=\mathrm{nRT}(\mathrm{n}, \mathrm{T}$ constant $)$ $\mathrm{PV}=$ constant...
Read More →Tyndall effect is more effectively shown by :
Question: Tyndall effect is more effectively shown by :true solutionlyophilic colloidlyophobic colloidsuspensionCorrect Option: , 3 Solution: Tyndall effect is observed in lyophobic colloids...
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Question: Consider the above reaction, the major product 'P' is:Correct Option: , 3 Solution:...
Read More →1.46g of a biopolymer dissolved in a
Question: $1.46 \mathrm{~g}$ of a biopolymer dissolved in a $100 \mathrm{~mL}$ water at $300 \mathrm{~K}$ exerted an osmotic pressure of $2.42 \times 10^{-3}$ bar. The molar mass of the biopolymer is_________ $\times 10^{4} \mathrm{~g}$ $\mathrm{mol}^{-1}$. (Round off to the Nearest Integer) $\mathrm{mol}^{-1}$. (Round off to the Nearest Integer) [Use : $\mathrm{R}=0.083 \mathrm{~L}$ bar $\mathrm{mol}^{-1} \mathrm{~K}^{-1}$ ] Solution: $\pi=$ CRT $; \pi=$ osmotic pressure $\mathrm{C}=$ molarity ...
Read More →The correct order of intensity of colors
Question: The correct order of intensity of colors of the compounds is :$\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\left[\mathrm{NiCl}_{4}\right]^{2-}\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$$\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\left[\mathrm{NiCl}_{4}\right]^{2-}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$$\left[\mathrm{NiCl}_{4}\right]^{2-}\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\left[\mathrm...
Read More →Choose the correct name for compound given below:
Question: Choose the correct name for compound given below: (4E)-5-Bromo-hex-4-en-2-yne(2E)-2-Bromo-hex-4-yn-2-ene(2E)-2-Bromo-hex-2-en-4-yne(4E)-5-Bromo-hex-2-en-4-yneCorrect Option: Solution: h.p. $\Rightarrow$ higher priority l.p. $\Rightarrow$ lower priority $2 \mathrm{E}-2-$ bromo hex $-2$ - en-4-yne...
Read More →In polythionic acid,
Question: In polythionic acid, $\mathrm{H}_{2} \mathrm{~S}_{x} \mathrm{O}_{6}(\mathrm{x}=3$ to 5) the oxidation state(s) of sulphur is/are :+ 5 only+ 6 only+ 3 and + 5 only0 and + 5 onlyCorrect Option: , 4 Solution:...
Read More →The conductivity of a weak acid HA of concentration
Question: The conductivity of a weak acid HA of concentration $0.001 \mathrm{~mol} \mathrm{~L}^{-1}$ is $2.0 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$. If $\Lambda_{\mathrm{m}}^{\circ}(\mathrm{HA})=190 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$, the ionization constant $\left(\mathrm{K}_{\mathrm{a}}\right)$ of HA is equal to_______$\times 10^{-6}$ (Round off to the Nearest Integer) Solution: $\Lambda_{\mathrm{m}}=1000 \times \frac{\kappa}{\mathrm{M}}$ $=1000 \times \frac{2 \times 10^{-...
Read More →Which one of the following species
Question: Which one of the following species responds to an external magnetic field?$\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$$\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$$\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}$$\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$Correct Option: 1, Solution: $\mathrm{Fe}^{3+}:[\mathrm{Ar}] 3 \mathrm{~d}^{5}$ Hybridisation : $\mathrm{sp}^{3} \mathrm{~d}^{2}$ Magnetic nature : Paramagnetic (so this complex response to external magne...
Read More →Green chemistry in day-to-day life
Question: Green chemistry in day-to-day life is in the use of:Chlorine for bleaching of paperLarge amount of water alone for washing clothesTetrachloroethene for laundryLiquified $\mathrm{CO}_{2}$ for dry cleaning of clothesCorrect Option: , 4 Solution: Chlorine gas was used earlier for bleaching paper. These days, hydrogen peroxide $\left(\mathrm{H}_{2} \mathrm{O}_{2}\right)$ with suitable catalyst. Tetra chlroroethene $\left(\mathrm{Cl}_{2} \mathrm{C}=\mathrm{CCl}_{2}\right)$ was earlier used ...
Read More →CO_2 gas adsorbs on charcoal following Freundlich
Question: $\mathrm{CO}_{2}$ gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of $\mathrm{CO}_{2}$ adsorbed becomes 64 times when the pressure of $\mathrm{CO}_{2}$ is doubled. The value of $\mathrm{n}$ in the Freundlich isotherm equation is_______ $\times 10^{-2}$. (Round off to the Nearest Integer) Solution: Freundlich isotherm. ; $\frac{X}{m}=k \cdot p^{\frac{1}{n}}$ Substituting values ; $\left(\frac{64}{1}\right)=(2)^{\frac{1}{n}} \Rig...
Read More →The unit of the van der Waals gas equation
Question: The unit of the van der Waals gas equation parameter 'a' in $\left(\mathrm{P}+\frac{\mathrm{an}^{2}}{\mathrm{~V}^{2}}\right)(\mathrm{V}-\mathrm{nb})=\mathrm{nRT}$ is :$\mathrm{kg} \mathrm{m} \mathrm{s}^{-2}$$\mathrm{dm}^{3} \mathrm{~mol}^{-1}$$\mathrm{kg} \mathrm{m} \mathrm{s}^{-1}$atm $\mathrm{dm}^{6} \mathrm{~mol}^{-2}$Correct Option: , 4 Solution: $\frac{\mathrm{an}^{2}}{\mathrm{~V}^{2}}=\mathrm{atm} \Rightarrow \mathrm{a}=\mathrm{atm} \times \frac{\mathrm{dm}^{6}}{\mathrm{~mol}^{2}...
Read More →The density of NaOH solution is
Question: The density of $\mathrm{NaOH}$ solution is $1.2 \mathrm{~g} \mathrm{~cm}^{-3}$. The molality of this solution is________ $\mathrm{m}$. (Round off to the Nearest Integer) [Use : Atomic masses : $\mathrm{Na}: 23.0 \mathrm{u} \quad \mathrm{O}: 16.0 \mathrm{u}$ $\mathrm{H}: 1.0 \mathrm{u}$ Density of $\mathrm{H}_{2} \mathrm{O}: 1.0 \mathrm{~g} \mathrm{~cm}^{-3}$ ] Solution: Consider $1 \ell$ solution mass of solution $=(1.2 \times 1000) \mathrm{g}$ $=1200 \mathrm{gm}$ Neglecting volume of ...
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Question: is a repeating unit for :NovolacBuna-NAcrilanNeopreneCorrect Option: 1 Solution: 25 July 2021, Time 9AM to 12PM (Shift 1)...
Read More →In the following sequence of reactions the P is :
Question: In the following sequence of reactions the P is : Correct Option: 1 Solution:...
Read More →The correct structure of Rhumann's Purple, the compound
Question: The correct structure of Rhumann's Purple, the compound formed in the reaction of ninhydrin with proteins is :Correct Option: , 4 Solution:...
Read More →Given below are two statements : one is labelled as
Question: Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R): Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. In the light of the above statements, choose the most appropriate answer from the options given below:Both (A) and (R) are correct and (R) is the correct explanation of (A)(A) is correct but (R) is not correct(...
Read More →According to the valence bond theory the hybridization
Question: According to the valence bond theory the hybridization of central metal atom is $\mathrm{dsp}^{2}$ for which one of the following compounds?$\mathrm{NiCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}$$\mathrm{K}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$$\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$$\mathrm{Na}_{2}\left[\mathrm{NiCl}_{4}\right]$Correct Option: , 2 Solution: 1) $\mathrm{NiCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}$ $\mathrm{Ni}^{+2} \rightarrow[\mathrm{Ar}]_{18} 3 \mathrm{~d}^{...
Read More →If the concentration of glucose
Question: If the concentration of glucose $\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)$ in blood is $0.72 \mathrm{~g} \mathrm{~L}^{-1}$, the molarity of glucose in blood is __________ $\times 10^{-3} \mathrm{M}$. (Nearest integer) [Given: Atomic mass of $\mathrm{C}=12, \mathrm{H}=1, \mathrm{O}=16 \mathrm{u}$ ] Solution: $[$ Glu cose $]=\frac{\mathrm{C}(\mathrm{gm} / \ell)}{\mathrm{M}(\mathrm{gm} / \mathrm{mol})}=\frac{0.72}{180}=4 \times 10^{-3} \mathrm{M}$...
Read More →Given below are two statements: One is labelled as Assertion
Question: Given below are two statements: One is labelled as Assertion $\mathbf{A}$ and the other labelled as Reason $\mathbf{R}$. Assertion A : Lithium halides are some what covalent in nature. Reason R : Lithium possess high polarisation capability.$\mathbf{A}$ is true but $\mathbf{R}$ is false$\mathbf{A}$ is false but $\mathbf{R}$ is trueBoth $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\...
Read More →Out of following isomeric forms of uracil, which one is present in RNA ?
Question: Out of following isomeric forms of uracil, which one is present in RNA ?Correct Option: , 4 Solution: Isomeric form of uracil present in RNA...
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Question: $\mathrm{N}_{2} \mathrm{O}_{5(\mathrm{~g})} \rightarrow 2 \mathrm{NO}_{2(\mathrm{~g})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})}$ In the above first order reaction the initial concentration of $\mathrm{N}_{2} \mathrm{O}_{5}$ is $2.40 \times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1}$ at 318 K. The concentration of $\mathrm{N}_{2} \mathrm{O}_{5}$ after 1 hour was $1.60$ $\times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1}$. The rate constant of the reaction at $318 \mathrm{~K}$ is _________ $\times...
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