Question

10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a
given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount
HCl solution (the same solution as before) required to neutralise it will be
(a) 4 mL (b) 8 mL (c) 12 mL (d) 16 mL

NCERT Class 10th Science Chapter 2 Acids Bases and Salts

Answer 1

if we take double the amount of same naoh sol ,the amount of same hcl solution reqires to neutrilize it is also double... 
the option d is correct
16 ml................