List of top Chemistry Questions

One of the characteristic properties of non-metals is that they
In the periodic table from left to right in a period, the atomic volume
When $CuSO_4 $ is electrolysed using platinum electrodes?
Industrial preparation of chloroform employs acetone and
The number of atoms contained in a fcc unit cell of a monoatomic substance is
When chlorine is passed through propene at $400^{\circ} C,$ which is the following is formed?
When hydrochloric acid gas is treated with propene in presence of benzoyl peroxide, it gives
Which is the correct symbol relating the hetero Kekule structure of benzene?
Among acetic acid, phenol and n-hexanol which one of the following compound will react with $NaHCO_3$ solution to give sodium salt and $CO_2$ ?
A compound is treated with $NaNH_2$ to give sodium salt. Identify the compound.
On doping Ge metal with a little of In or Ga, one gets
The most suitable method of separation of $1 : 1$ mixture of ortho and para-nitrophenols 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
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
Enzymes take part in a reaction and
Benzene reacts with n-propyl chloride in the presence of anhydrous $AlCl_3$ to give
If ionisation potential for hydrogen atom is 13.6 eV, then ionisation potential for $He^+$ will be
A1 is more reactive than Fe but A1 is less'-easily corroded than Fe because
Which of the following species has four lone pairs of electrons?
Which of the following noble gas is not present in atmosphere ?
Internal energy and pressure of a gas per unit volume are related as
When is the deviation more in the behaviour of a gas from the ideal gas equation pV = nRT?
The catalyst used in the manufacture of polyethene by Zeigler method is
The osmotic pressure of a solution can be increased by