(a) Mahesh prepared a basic solution X that has a pH 7. How will the pH of the solution X change on addition of the following:

(a) 1. On adding the acid, pH value will decrease.

2. On adding the solution of a base, pH value will increase.

(b) As the atomic number is 15, so the electronic configuration will be 2, 8, 5. Hence, it will belong to VA group.