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QUESTION
Q28) How much water should be added to 200 c.c. of semi normal solution of NaOH to make it exactly deci normal ? [ AFMC 1983]
a) 200 c.c.
b) 400 c.c.
c) 800 c.c.
d) 600 c.c.
SOLUTION
(200)(N/2)=V ( N/10)
∴ V=1000 c.c
Hence volume of water to be added=1000 - 200=800 c.c.Answer: (c)