Which of the following is obtained by catalytic oxidation of ammonia?

Which of the following represents the correct order of the inert pair effect?

Which pair of metals does not dissolve in nitric acid?

In $Group-13$ $(IIIA)$,$Tl$ (thallium) shows $+1$ oxidation state while other members show $+3$ oxidation state. Why?

In the electrothermal process,the compound displaced by silica from calcium phosphate is

Statement $(A)$: Among the oxides of nitrogen, $NO$ and $NO_2$ are paramagnetic.
Statement $(B)$: $NO$ is paramagnetic in the gaseous state and diamagnetic in the liquid state.
The correct answer is: