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Question

Which of the following solutions is more concentrated than the others?

A
5.3 gm of Na2CO3 in 500 ml solution
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B
5 gm of NaOH in 100 ml solution
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C
3.65 gm of HCl in 750 ml solution
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D
4.9 gm of H2SO4 in 1000 ml solution
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Solution

The correct option is B 5 gm of NaOH in 100 ml solution
Molarity (M) =nV(in ml)×1000

[A]M=5.3106×1000500=0.1

[B]M=540×1000100=1.25

[C]M=3.6536.5×1000750=0.133

[D]M=4.998×10001000=0.05

[B] is the most concentrated solution.


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