10g of sodium hydroxide dissolved in 1 L of water to make _____ solution.

0.25 M

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0.5 M

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1 M

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1.5 M

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4 M

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Solution

The correct option is D $0.25 M$
molar mass of sodium hydroxide $=$ $40 g / m o l e$
$M o l a r i t y = \frac{M a s s o f s o l u t e}{(M o l a r m a s s o f t h e s o l u t e) \times (V o l u m e o f s o l u t i o n i n l i t r e s)}$

So $M o l a r i t y$ $=$ $10 / (40 \times 1)$ $=$ $0.25 M$

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