List of top Chemistry Questions

Enzymes take part in a reaction and

A compound is treated with $NaNH_2$ to give sodium salt. Identify the compound.

If ionisation potential for hydrogen atom is 13.6 eV, then ionisation potential for $He^+$ will be

When chlorine is passed through propene at $400^{\circ} C,$ which is the following is formed?

Industrial preparation of chloroform employs acetone and

Among the following which compound will show the highest lattice energy?

Benzene reacts with n-propyl chloride in the presence of anhydrous $AlCl_3$ to give

Internal energy and pressure of a gas per unit volume are related as

The number of atoms contained in a fcc unit cell of a monoatomic substance is

When is the deviation more in the behaviour of a gas from the ideal gas equation pV = nRT?

Which is the correct symbol relating the hetero Kekule structure of benzene?

Which of the following species has four lone pairs of electrons?

Which of the following noble gas is not present in atmosphere ?

The most suitable method of separation of $1 : 1$ mixture of ortho and para-nitrophenols is :

Among acetic acid, phenol and n-hexanol which one of the following compound will react with $NaHCO_3$ solution to give sodium salt and $CO_2$ ?

One of the characteristic properties of non-metals is that they

Which electronic configuration of an element has abnormally high difference between second and third ionisation energy?

In the periodic table from left to right in a period, the atomic volume

If the atomic number of an element is 33, it will be placed in the periodic table in the

$Na^+, Mg^{2+}, Al^3+ \, and \, Si^{4+}$ are isoelectronic. The order of their ionic size is

Ethanol and dimethyl ether form a pair of functional isomers. The boiling point of ethanol is higher than that of dimethyl ether due to the presence of

When $CuSO_4 $ is electrolysed using platinum electrodes?

On doping Ge metal with a little of In or Ga, one gets

The product of addition polymerization reaction is