Ratio of $\pi \backslash pi$ to $\sigma \backslash sigma$ bonds in benzene is

The correct decreasing order of the boiling points of $H_{2}O,HFH\_2O,\; HF$ and $N{H}_{3}NH\_3$ is

In which of the following substances will hydrogen bond be strongest?

The number of types of bonds between two carbon atoms in calcium carbide is

Which of the following has highest bond angle?

The correct order of bond angles (smallest first) in

The correct order in which the O–O bond length increases in the following is

Which one of the following compounds has the smallest bond angle in its molecule?

The correct order of C–O bond lengths among $CO,C{O}_3^{2-}CO,\; CO\_3^\{2-\}$and $C{O}_{2}CO\_2$ is

Likely bond angles of $S{F}_{4}SF\_4$ molecule are