Q.

Assertion A:  An aqueous solution of ammonium acetate can act as a buffer.

Reason R:  Acetic acid is a weak acid and NH4OH is a weak base.

1 Both A and R are true and R is the correct explanation of A  
2 Both A and R are true but R is not the correct explanation of A  
3 A is false but R is true  
4 Both A and R are false  

Ans.

(2)

Both assertion and reason are true but reason is not correct explanation of assertion.

Ammonium acetate is a salt of weak acid (CH3COOH) and weak base (NH4OH).