NEET 2018 Question Paper Mock Test

The correction factor ‘$a$ ’ to the ideal gas equation corresponds to:

Consider the following species: ${\text{CN}}^{+},{\text{CN}}^{-},\text{NO}$ and $\text{CN}$. Which one of these will have the highest bond order?

Magnesium reacts with an element ($X$) to form an ionic compound. If the ground state electronic configuration of ($X$) is $1s^{2}2s^{2}2p^3$, the simplest formula for this compound is:

Iron exhibits bcc structure at room temperature. Above $900^{\circ }\text{C}$, it transforms to fcc structure. The ratio of density of iron at room temperature to that at $900^{\circ }\text{C}$ is:

Which one is a wrong statement?