Which among the following oxides of nitrogen is called nitrogen sesquioxide?

How many numbers of $P-OH$ and $P-O-P$ bonds are present in pyrophosphoric acid respectively?

Assertion $(A)$: $P_4O_{10}$ cannot be used to remove moisture from ammonia gas. Reason $(R)$: $P_4O_{10}$ reacts with $NH_3$ gas. The correct answer is:

Why is nitrogen chemically inert?

Pure $N_2$ gas is obtained from

Which one of the following is correct with respect to basic character?