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Q.

How much water should be added to 200 c.c. of semi normal solution of NaOH to make it exactly decinormal ?

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a

200 cc

b

400 cc

c

800 cc

d

600 cc

answer is C.

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Detailed Solution

$N_{1} V_{1} = N_{2} V_{2}; \frac{1}{2} \times 200 = \frac{1}{10} \times V_{2}; V_{2} = 1000 ml$

Volume of water added = 1000 - 200 = 800 ml

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