List of top Chemistry Questions on Group 15 Elements asked in AIIMS

Which one of the following forms vortex ring?

The following are some statements related to $VA $ group hydrides, I. Reducing property increases from $NH_{3}$ to $BiH_{3}$ II. Tendency to donate lone pair decreases from $NH_{3}$ to $BiH_{3}$ III. Thermal stability of hydrides decreases from $NH_{3}$ to $BiH_{3}$ IV. Bond angle of hydrides decreases from $NH_{3}$ to $BiH_{3}$ The correct statements are

The chemical formula of 'tear gas" is

Sodium thiosulphate is used in photography to

Nitrogen is unreactive at room temperature but becomes reactive at elevated temperatures (on heating) or in the presence of catalysts. In nitrogen molecules, there is extensive delocalization of electrons.