KCET 2020

The oxide of potassium that does not exist is

The metal that produce \(\mathrm{H}_2\) with both dil. \(\mathrm{HCl}\) and \(\mathrm{NaOH}(a q)\) is

Silicon doped with gallium forms

A metal crystallises in face centred cubic structure with metallic radius \(\sqrt{2} \mathop A\limits^o\). The volume of the unit cell (in \(\mathrm{m}^3\) ) is

A metal exists as an oxide with formula \(M_{0.96}\) O. Metal, \(M\) can exist as \(M^{2+}\) and \(M^{3+}\) in its oxide \(M_{0.96} \mathrm{O}\). The percentage of \(\mathrm{M}^{3+}\) in the oxide is nearly

A gas mixture contains \(25 \% \mathrm{~He}\) and \(75 \% \mathrm{~CH}_4\) by volume at a given temperature and pressure. The percentage by mass of methane in the mixture is approximately _________.

\(0.4 \mathrm{~g}\) of dihydrogen is made to react with \(7.4 \mathrm{~g}\) of dichlorine to form hydrogen chloride. The volume of hydrogen chloride formed at \(273 \mathrm{~K}\) and \(1 \mathrm{~bar}\) pressure is

During adsorption of a gas on a solid at low temperature

A sol of \(\mathrm{AgI}\) is prepared by mixing equal volumes of \(0.1 \mathrm{~M} \mathrm{~AgNO}_3\) and \(0.2 \mathrm{~M} \mathrm{~KI}\), which of the following statement is correct?

When the same quantity of heat is absorbed by a system at two different temperatures \(T_1\) and \(T_2\), such that \(T_1>T_2\), change in entropies are \(\Delta S_1\) and \(\Delta S_2\) respectively. Then