Chemistry Test ...

This compound forms a sodium salt upon reacting with \({NaNH}_{2}\). Identify the compound.

o-Phenylenediamine \(\xrightarrow{\mathrm{HNO}_2}{ }^{\prime} \mathrm{X}\) ' Major Product ' \(\mathrm{X}\) ' is

When the pure solvent diffuses out of the solution through the semi-permeable membrane then the process is called:

Presence of unsaturation in organic compounds can be tested with:

A segment of DNA has \(120\) adenine and \(120\) cytosine bases. The total number of nucleotides present in the segment is _________.

A crystal of lead (II) sulphide has NaCl structure. In this crystal the shortest distance between a Pb²⁺ ion and S^2– ion is 297 pm. What is the volume of unit cell in lead sulphide?

\(1.00 {~g}\) of a non- electrolyte solute (molar mass \(250 {~g} {~mol}^{-1}\) ) was dissolved in \(51.2 {~g}\) of benzene. If the freezing point depression constant, \({K}_{{f}}\) of benzene is \(5.12 {~k} {~kg} {mol}^{-1}\), the freezing point of benzene will be lowered by:

In which one of the following properties, physisorption and chemisorption resemble each other?

In a first order reaction with time the concentration of the reactant decreases:

A solution containing \(10 {~g}\) per \({dm}^{3}\) of urea (molecular mass \(\left.=60 {~g} {~mol}^{-1}\right)\) is isotonic with a \(5 \%\) solution of a non-volatile solute. The molecular mass of this non-volatile solute is: