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Question

Which of the following solution is acidic in nature?

A
20ml of 0.1 M H2SO4 + 20ml of 0.3 M NaOH
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B
10ml of 0.1 M H2SO4 + 20ml of 0.2 M NaOH
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C
10ml of 0.1 M H2SO4 + 10ml of 0.1 M NaOH
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D
20ml of 0.1 M H2SO4 + 40ml of 0.1 M NaOH
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Solution

The correct option is B 10ml of 0.1 M H2SO4 + 10ml of 0.1 M NaOH
(A) Eq. mole of H2SO4=2×0.1×20; eq. mole of NaOH=0.3×20

(B) Eq. mole of H2SO4=2×0.1×10; eq. mole of NaOH=0.2×20

(C) Eq. mole of H2SO4=0.1×2×10; eq. mole of NaOH=0.1×10

[D] Eq. mole of H2SO4=0.1×2×20; eq. mole of NaOH=0.1×40

Only in option [C], eq. mole of H2SO4> eq. mole of NaOH, so it is acidic.

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