Q.

Assertion: H3PO4+2NaOH→Na2HPO4+2H2O

Eq. wt of H3PO4 in above reaction is 49

Reason: In all reactions H3PO4 is a dibasic acid

1 A is True, R is true R is correct explanation of A  
2 A is True, R is True R is not correct explanation of A  
3 A is True, R is false  
4 A is false, R is True  

Ans.

(3)

H3PO4 is Tribasic