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When a jar containing gaseous mixture of equal volumes of `CO_(2)` and `H_(2)` is placed in a solution of sodium hydroxide, the solution level will
A. Rise
B. Fall
C. Remain constant
D. Become zero

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Correct Answer - A
Solution level will rise , due to absorption of `CO_(2)` by sodium hydroxide.
`2NaOH +CO_(2) rarr Na_(2)CO_(3)+H_(2)O`

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