Chemistry Test ...

The enthalpy of combustion of methane, graphite and dihydrogen at \(298 \mathrm{~K}\) are \(-890.3 \mathrm{~kJ} \mathrm{~mol}^{-1},-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\), and \(-285.8 \mathrm{~kJ} \mathrm{~mol}^{-1}\) respectively. Enthalpy of formation of \(\mathrm{CH}_{4}(\mathrm{g})\) will be:

Match List - I with List - II and select the correct answer by using the codes given below the list:

The transference of molecules from the vapour phase to the liquid phase is called:

Most acidic hydrogen is present in:

Enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis, and addition of groups to double bonds, are called ____________.

The unit cell length of sodium chloride crystal is 564 pm. Its density would be:

How many sigma bonds are present in \(\mathrm{CHCl}_{3}\) ?

The physical adsorption of gases on the solid surface is due to:

The rate constant for a first order reaction is \(4.606 \times 10^{-3} \mathrm{~s}^{-1}\). The time required to reduce \(2.0 g\) of the reactant to \(0.2 g\) is: