Ammonia gas is dried by using ...........

For the properties mentioned,the correct trend for the different species is in

Assertion : White phosphorus is more reactive than red phosphorus.
Reason : Red phosphorus consists of $P_4$ tetrahedral units linked to one another to form linear chains.

Which of the following oxides is the least acidic?

In the nitrogen family,the $H-M-H$ bond angle in the hydrides $MH_3$ gradually becomes closer to $90^o$ on going from $N$ to $Sb$. This shows that gradually:

Laughing gas is prepared by heating