Consider the above reaction sequence and identify the major product P.

Coagulation of egg, on heating is because of :

Which one of the following reactions is NOT possible?

The number of ions from the following that have the ability to liberate hydrogen from a dilute acid is _________.

$$\mathrm{Ti}^{2+}, \mathrm{Cr}^{2+} \text { and } \mathrm{V}^{2+}$$