Question

A salt can be produced by reaction between:
A. a weak acid and weak base.
B. metal oxide and water.
C. metal and a mineral acid.
D. metal oxide and a mineral acid.

• A. A, B and C
• B. B,C and D
• C. C, D and A
• D. D, A and B

Answer 1

The correct option is C C, D and A

Salt can be prepared by the following methods:

1. Weak acid and weak base: $N{H}_{4}OH+{CH}_{3}COOH\to {CH}_{3}COO{NH}_4+H_{2}O$
2. Metal and mineral acid: $Mg+H_2{SO}_4\to MgS{O}_4+H_2$
3. Metal oxide and mineral acid: $2H{NO}_3+{Na}_{2}O\to 2Na{NO}_3+H_{2}O$

While metal oxide with water gives the base and not a salt. Hence, the answer is $A,C,D$.