$P_4 O_{10}$ is the anhydride of

Sodium nitrite is reacted with $H_2SO_4$ to form $NaHSO_4$,$HNO_3$,water and $X$. Gold is dissolved in aqua regia to form water,$AuCl_4^{-}$ and $Y$. $X$ and $Y$ are respectively

The $P-P-P$ bond angle in white phosphorus is

The boiling points of the following hydrides follow the order of:

Which gas is used in the manufacturing of nitrogenous fertilizers?

Which of the following is not hydrolysed?