List of top Chemistry Questions

Among $LiCl, BeCl_2, BCl_3 $and $CCl_4$ , the covalent bond character follows the order

If $\Delta H$ is the change in enthalpy and $\Delta E$, the change in internal energy accompanying a gaseous reaction, then

Linear combination of two hybridised orbitals belonging to the two atoms, each having one electron leads to a

Absolute zero is defined as the temperature

Which statement is not correct?

An organic compound X(molecular formula C6H7O2N) has six carbon atoms in a ring system, two double bonds and a nitro group as substituent, X is

Root mean square velocity of a gas molecule is proportional to

Boron has two stable isotopes, $^{10}B (19 \%)$ and $ ^{11}B (81\%)$. Calculate average atomic weight of boron in the periodic table.

Compared with the alkaline earth metals, the alkali metals exhibit

The ability of a substance to assume in two or more crystalline structures is called

The coordination number of copper in cupram- monium sulphate is

The ionisation of hydrogen atom would give rise to

Of the following, the metals that cannot be obtained by electrolysis of the aqueous solution of their salts are

In $P_4O_6$, the number of oxygen atoms bonded to each phosphorus atom is

Electrolysis of aqueous solution of $CH_3COOK$ gives

Washing soda has formula

Kjeldahl's method is used in the estimation of

Compared with the alkaline earth metals, the alkali metals exhibit:

When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are exchanged with

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives

The rate of diffusion of methane is twice that of X. The molecular mass of X is

Amongst the following, the most basic compound is

Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halide due to

Amongst the elements with following electronic configurations, which one may have the highest ionisation energy?

A solution of potassium ferrocyanide would contain.....ions