A) Calcium carbide
B) Calcium hydride
C) Calcium oxide
D) Calcium
Correct Answer: B
Solution :
\[Ca{{H}_{2}}+2{{H}_{2}}O\to Ca{{(OH)}_{2}}+2{{H}_{2}}\uparrow \] \[Ca+2{{H}_{2}}O\to Ca{{(OH)}_{2}}+{{H}_{2}}\uparrow \]
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