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How much water should be added to 200 c.c of seminormal solution of NaOH to make it exactly decinormal?
A. (a)`200 c c`
B. (b)`400 c c`
C. (c )`800 c c`
D. (d)`600 c c`

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Correct Answer - d
`N_(1)V_(1)=N_(2)V_(2), 1/2xx200=1/10xxV_(2),V_(2)=1000 mL`
Volume of water added `=1000-200=800 mL`

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