List of top Chemistry Questions

Dissolving $120 \,g$ of a compound of (mol. wt. $60$) in $1000 \,g$ of water gave a solution of density $1.12 \,g/mL$. The molarity of the solution is :

For the compounds $CH_3Cl, \, CH_3Br,\,CH_3I$ and $CH_3F,$ the correct order of increasing $C$-halogen bond length is :

Considering the basic strength of amines in aqueous solution, which one has the smallest $pK_b$ value?

For the reaction, $ SO_2 ( g) + \frac{1}{2} O_2 \, ( g) \rightleftharpoons SO_3 \, ( g) $ if $ K_P = K_C \, ( RT)^x $ X where, the symbols have usual meaning, then the value of x is (assuming ideality)

Which one of the following acids does not exhibit optical isomerism?

$K_{c}$ for the the reaction, $\left[ Ag ( CN )_{2}\right]^{-} \rightleftharpoons Ag ^{+}+2 CN ^{-}$, the equillibrium constant at $25^{\circ} C$ is $4.0 \times 10^{-19}$, then the silver ion concentration in a solution which was originally $0.1$ molar in $KCN$ and $0.03$ molar in $AgNO _{3}$ is :

For $K_4[Fe(CN)_6]$, coordination number and oxidation state are respectively

What happens when an inert gas is added to an equilibrium keeping volume unchanged ?

If $m$ and $e$ are the mass and charge of the revolving electron in the orbit of radius $r$ for hydrogen atom, the total energy of the revolving electron will be :

The total number of octahedral void(s) per atom present in a cubic close packec structure is :-

The most suitable reagent for the conversion of $RCH_2OH \to RCHO$ is

In the Victor-Meyer's test, the colour given by $1^{\circ}$, $2^{\circ}$and $3^{\circ}$ alcohols are respectively :

The pair of compounds that can exist together is:

Magnetic moment 2.83 BM is given by which of the following ions?
(At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)

Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?

D(+) glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime would be:

Calculate the energy in joule corresponding to light of wavelength 45 nm:
(Planck’s constant h = 6.63 × 10^-34 Js; speed of light c = 3 × 10⁸ ms^-1)

If a is the length of the side of a cube , the distance between the body centred atom and one corner atom in the cube will be

Among the following sets of reactants which one produces anisole ?

Artificial sweetener which is stable under cold conditions only is:

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is:

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 gm of sample neutralized 10 mL of 1 M H₂SO₄, The percentage of nitrogen in the soil is:

What is the maximum number of orbitals that can be identified with the following quantum number?
n = 3, l = 1, m_l = 0

The weight of silver (at wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O₂ at STP will be:

When 0.1 mol MnO₄^2– is oxidised the quantity of electricity required to completely oxidise MnO4^2– to MnO₄^– is