List of top Chemistry Questions

Calcium is obtained by the

Equivalent conductance of $ NaCl, HCl$ and $C_2H_5COONa $ at infinete dilution are $126.45, 426.16$ and $91 \Omega ^{-1} cm^2 $ , respectively. The equivalent conductance of $C_2H_5COOH $ is

Enzymes, in the living systems

A basic lining is given to a furnace by using

Which one of the following has the highest dipole moment?

In graphite, electrons are

The process of zone refining is used in purification of

Ebonite is

Which of the following is an unsaturated acid ?

The total number of orbitals in a shell can be given in the form of $n$. The principal quantum number is

Which one of the following is the strongest acid?

Which of the following can give iodometric titration?

Rate constant of a first order reaction is $ 0.0693\,\,{{\min }^{-1}} $ . If we start with $ 20\,mol\,{{L}^{-1}}, $ it is reduced to $ 2.5\,mol\,{{L}^{-1}} $ in:

Which one of the following compounds has $sp^2-$ hybridisation?

Among $KO_2$, $AlO_2^-$ , $BaO_2$ and $NO_2^+$, unpaired electron is present in

Smoke is an example of:

Lowering of vapour pressure is highest for

Azeotropic mixture of $ HCl $ and water has

Vapour pressure of benzene at $30^{\circ} C$ is $121.8\, mm$. when $15\, g$ of a non-volatile solute is dissolved in $250\, g$ of benzene, its vapour pressure is decreased to $120.2\, mm$. The molecular weight of the solute is

Addition of $ HgC{{l}_{2}} $ to $ SnC{{l}_{2}} $ gives a brown black colour which is due to the

Which contains both polar and non-polar bonds?

Which of the following cannot be formed ?

If 1, 3-dibromopropane reacts with zinc and NaI, the product obtained is

A solution wiht $pH = 2$ is more acidic than one with a $pH = 6$, by a factor

A base, as defined by Bronsted theory, is a substance which can