Which of the following compound give basic solution on hydrolysis ?
(1) `NH_(4)Cl` (2) `K_(2)CO_(3)`
(3) `Na_(2)B_(4)O_(7). 10H_(2)O` (4) NaCl

Options

A. 1, 2, 3
B. 2, 3
C. 2, 3,4
D. 3,4

Answer

B

Explanation

1. Hydrolysis
`NH_(4)Cl + H_(2)O rarr underset(("Weak base"))(NH_(4)OH) + underset(("Strong acid"))(HCl)`
So, `NH_(4)Cl` is neutral
2. `K_(2)CO_(3) + H_(2)O rarr underset(("Strong"))(KOH) + underset(("Weak acid"))(H_(2)CO_(3))` So, basic solution
3. `Na_(2)B_(4)O_(7).10H_(2)O + 7H_(2)O rarr underset(("strong base"))(2NaOH) + underset(("Weak acid"))(4H_(3) BO_(3) + 10H_(2)O)`
So, is a basic solution.
4. `NaCl + H_(2)O rarr underset(("Strong base"))(NaOH) + underset(("Strong acid"))(HCl)`
So, is a neutral solution
So, `K_(2)CO_(3) and Na_(2)B_(4)O_(7). 10H_(2)O` gives basic solution.