Q91) The volume of water to be added to 100cm3 of 0.5N H2SO4 to get deci normal concentration is ... [ KCET 2001]
SOLUTION
deci normal concentration=0.1N
N1V1=N2 V2
0.5 ×100=0.1 × V
V=500 cm3
∴ Water to be added to 100 cm3 solution
=500 - 100=400 cm3
Answer: (d)