Which of the following is the richest source of plant protein?

Which of the following is not a greenhouse gas?

Which of the following equations represents a circle?

The reading of the ammeter in the circuit shown will be: (in $A$)

The alkali metals form salt-like hydrides by direct synthesis at elevated temperatures. The thermal stability of these hydrides decreases in which of the following orders?

One energy difference between the states $n = 2$ and $n = 3$ is $E \, eV$ in a hydrogen atom. The ionization potential of the $H$ atom is ........... $E$.