On reaction with dilute \( \mathrm{H}_{2} \mathrm{SO}_{4} \), which of the following salts will ...

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On reaction with dilute \( \mathrm{H}_{2} \mathrm{SO}_{4} \), which of the following salts will give out a gas that turns an acidified dichromate paper green ?
(A) \( \mathrm{Na}_{2} \mathrm{CO}_{3} \)
(B) \( \mathrm{Na}_{2} \mathrm{~S} \)
(C) \( \mathrm{ZnSO}_{3} \)
(D) \( \mathrm{FeS} \)
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