Which of the following pair of substances gives same gaseous product on reaction with water? (A)...
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Which of the following pair of substances gives same gaseous product on reaction with water?
(A) \( \mathrm{Na} \) and \( \mathrm{Na}_{2} \mathrm{O}_{2} \)
(B) \( \mathrm{Ca} \) and \( \mathrm{CaH}_{2} \)
(C) \( \mathrm{Ca} \) and \( \mathrm{CaO} \)
(D) \( \mathrm{Ba} \) and \( \mathrm{BaO}_{2} \)
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