Please give answer of question 20
Is it (b) 1mol???
I think the correct answer will be 1 mol because 1 mol of HCl is formed when Cl- of NH4Cl reacts with water,so we need additional 1 mol of HCl to neutralize this.
So,option b) is correct.
I mole of nh4cl will react with 1 mole of Naoh,and remaining one mole of naoh will react with
1 mole of hcl