Hydrogen has higher ionization energy than alkali metals,due to its

Which of the following chemicals contains chlorine?

Reaction between the following pairs will produce $H_2$ except:

The calorific value of producer gas is low because of:

Which property among the following is the same for both hydrogen and deuterium molecules?

Calcium imide on hydrolysis will give gas $(B)$ which on oxidation by bleaching powder gives gas $(C)$. Gas $(C)$ on reaction with magnesium gives compound $(D)$. $(D)$ on hydrolysis gives again gas $(B)$. $(B)$,$(C)$ and $(D)$ are