List of top Chemistry Questions

A unit cell with edge length $ a\ne b\ne c $ and axial angles $ \alpha =\beta =\gamma =90^{\circ} $ is called

Cold ferrous sulphate solution on absorption of $NO$ develops brown colour due to the formation of

A gas can be liquefied at temperature $T$ and pressure $P$ provided

In a mixture, two enantiomers are found to be present in $85\%$ and $15\%$ respectively. The enantiomeric excess $(e, e)$ is

Consider the following salts: $NaCl,\, HgCl_2,\, Hg_2Cl_2,\, CuCl_2,\, CuCl$ and $AgCl$. Identify the correct set of insoluble salts in water

Which one of the following monomers form biodegradable polymer?

$0.06\%\, (w/v)$ aqueous solution of urea is isotonic with

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at $25^{\circ } C$?

The sum of coordination number and oxidation number of the metal M in the complex \([M(en)_2(C_2O_4)]Cl\) (where en is ethylenediamine) is :-

The hybridization involved in complex $ {[Ni(CN)4]^{2-}}$ is (At.No. Ni = 28)

Nitrogen dioxide and sulphur have some properties in common. Which property is shown by one of these compounds, but not by the other?

The rate constant of the reaction $ A \to B$ is $0.6 \times 10^{-3}$ mole per second. If the concentration of A is 5 M, then concentration of $B$ after 20 minutes is :

If the equilibrium constant for ${ N2(g) + O2(g) <=> 2NO(g)}$ is K, the equilibrium constant for ${ \frac{1}{2} N_2 (g) + \frac{1}{2} O_2 (g) <=> NO(g) }$ will be :

What is the pH of the resulting solution when equal volumes of $0.1\, M \,NaOH$ and $0.01\, M$ $HCl$ are mixed ?

The two electrons have the following set of quantum numbers: $P = 3 , 2 , - 2 , + \frac {1}{2}$ $Q = 3,0,0,+\frac {1}{2}$ Which of the following statement is true ?

The electrolyte having maximum flocculation value for $AgI/Ag^+$ sol is

On heating with concentrated $NaOH$ solution in an inert atmosphere of $CO_2$ white phosphorous gives a gas. Which of the following statement is incorrect about the gas ?

In $H_2 - O_2$ fuel cell the reaction occurring at cathode is

How many ions per molecule are produced in the solution when Mohr salt is dissolved in excess of water ?

Which one of the following electrolytes has the same value of van't Hoff's factor (i) as that of $ {Al_2(SO_4)_3}$ (if all are 100% ionised) ?

$ : CCl_2 $ is

An alkali metal hydride $(NaH)$ reacts with diborane in $A$ to give a tetrahedral compound $B$ which is extensively used as reducing agent in organic synthesis. The compounds $A$ and $B$ respectively are

Which of the following compound possesses the "C - H" bond with the lowest bond dissociation energy ?

Which of the following will be able to show geometrical isomerism ?

In presence of $HCl, H_2S$ results the precipitation of Group-2 elements but not Gp-4 elements during qualitative analysis. It is due to