Lapis lazuli is

When concentrated nitric acid is heated,it decomposes to give

What is the product formed when phosphorus is oxidized by concentrated nitric acid?

The number of $P-H$,$P-O-P$,$P-O-H$ and $P=O$ bonds in sodium dihydrogen pyrophosphate $(Na_2H_2P_2O_7)$ are respectively:

Determine whether the following statements are True $(T)$ or False $(F)$:
$1.$ Ammonia is produced from a mixture of $SO_2$ and $N_2$.
$2.$ $N_2H_2$ and $N_2H_4$ are formed from a mixture of $N_2/H_2$ in the Haber process.
$3.$ Compounds of $d$ or $f$ block elements are not used as catalysts in the Haber process.

$NH_3$ reacts with bleaching powder to give: