The correct order of stability of various conformers of $2$$-$fluoroethanol is -

Incorrect statement about the compounds $\mathrm{I}, \mathrm{II}$ is

$\left(\mathrm{I}\right)$ 

$\left(\mathrm{II}\right)$ 

$\left(\mathrm{III}\right)$

Which of the following alkenes can generate optically active compounds upon hydrogenation?

The correct order of the increasing basic nature of the following base is

Among the compounds

the order of basicity is

The order of basicity of

in water is:

The most acidic proton and the strongest nucleophilic nitrogen in the following compound respectively, are: