\( \mathrm{P} \) The reaction of an element \( \mathrm{A} \) with w...

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\( \mathrm{P} \)
The reaction of an element \( \mathrm{A} \) with water produces combustible gas \( \mathrm{B} \) and an aqueous solution of \( \mathrm{C} \). When another substance \( \mathrm{D} \) reacts with this solution \( \mathrm{C} \) also produces the same gas \( \mathrm{B} \). \( \mathrm{D} \) also produces the same gas
W even on reaction with dilute \( \mathrm{H}_{2} \mathrm{SO}_{4} \) at room temperature. Element \( \mathrm{A} \) imparts golden yellow colour to Bunsen flame. Then A, B, C and D may be identified as :
(A) \( \mathrm{Na}, \mathrm{H}_{2} \mathrm{NaOH} \) and \( \mathrm{Zn} \)
(B) \( \mathrm{K}, \mathrm{H}_{2}, \mathrm{KOH} \) and \( \mathrm{Zn} \)
(C) \( \mathrm{K}, \mathrm{H}_{2}, \mathrm{NaOH} \) and \( \mathrm{Zn} \)
(D) \( \mathrm{Ca}, \mathrm{H}_{2}, \mathrm{CaCOH}_{2} \) and \( \mathrm{Zn} \)
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