The intermolecular force in solid hydrogen is .........

Which one of the following is the most abundant element in the universe?

Which of the following is true for heavy water?

Sulfuric acid has a strong affinity for water because,

Which of the following is a synthesis gas?

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