The laughing gas is

Which of the following reactions is not correctly matched with its products?

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

Nitrogen forms $N_2$,but phosphorus is converted from $P_2$ to $P_4$. Which of the following is the reason for this?

Phosphorus has three allotropic forms:
$(i)$ white phosphorus
$(ii)$ red phosphorus and
$(iii)$ black phosphorus.
Write the difference between white and red phosphorus on the basis of their structure and reactivity.

The cyanamide process is used in the formation of: