Recent questions in JEE

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\(\mathrm{HCl}\) was passed through a solution of \(\mathrm{CaCl}_{2}, \mathrm{MgCl}_{2}\) and \(\mathrm{NaCl}\). Which of the following compound(s) crystallise(a)?

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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2 answers

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Identify the correct statement from the following:

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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1 answer

A mixture of \(N_{2}\) and \(A r\) gases in a cylinder contains \(7 g\) of \(N_{2}\) and \(8 g\) of \(A r\). If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of \(N_{2}\) is: [Use atomic masses (in g \(\mathrm{mol}^{-1}\) ) : \(N=14, A r=40\) ]

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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2 answers

An increase in the concentration of the reactants of a reaction leads to change in :

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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3 answers

Paper chromatography is an example of :

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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30 answers

The number of Faradays(F) required to produce \(20 \mathrm{~g}\) of calcium from molten \(\mathrm{CaCl}_{2}\) (Atomic mass of \(\mathrm{CaCl}_{2} \mathrm{~g} \mathrm{~mol}^{-1}\) ) is :

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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1 answer

The freezing point depression constant \(\left(K_{f}\right)\) of benzene is \(5.12 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\). The freezing point depression for the solution of molality \(0.078 \mathrm{~m}\) containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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2 answers

The correct option for free expansion of an ideal gas under adiabatic condition is:

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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1 answer

The calculated spin only magnetic moment of \(C r^{2+}\) ion is :

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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1 answer

On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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3 answers

Hydrolysis of sucrose is given by the following reaction. Sucrose \(+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons\) Glucose \(+\) Fructose If the equilibrium constant \(\left(K_{c}\right)\) is \(2 \times 10^{13}\) at \(300 \mathrm{~K}\), the value of \(\Delta_{r} G^{\ominus}\) at the same temperature will be :

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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. Identify the correct statements from the following:

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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. Find out the solubility of \(\mathrm{Ni}(\mathrm{OH})_{2}\) in \(0.1 \mathrm{M} \mathrm{NaOH} .\) Given that the ionic product of \(\mathrm{Ni}(\mathrm{OH})_{2}\) is \(2 \times 10^{-15}\)

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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3 answers

Q1. Identify a molecule which does not exist.

asked Dec 30, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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3 answers

Q. I volt is equivalent to

asked Dec 30, 2021 in Biology by kritika (90.1k points)

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2 answers

Q. Algae have cell wall made up of

asked Dec 30, 2021 in Biology by kritika (90.1k points)

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3 answers

Q. Which of the following is false?

asked Dec 30, 2021 in Biology by kritika (90.1k points)

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Q. Which of the following physical quantity unit is not a fundamental unit?

asked Dec 30, 2021 in Biology by kritika (90.1k points)

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Q. Botanical name or scientific name of banana is

asked Dec 30, 2021 in Biology by kritika (90.1k points)

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