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Question

When a small amount of solid calcium phosphide (Ca3P2) is added to water, what are the most likely products formed?

A
Aqueous Ca2+ and OH ions and PH3 gas
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B
Aqueous Ca2+ and OH ions and H3PO3
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C
Solid CaH2 and H3PO3
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D
Solid CaO and PH3 gas
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Solution

The correct option is A Aqueous Ca2+ and OH ions and PH3 gas
Calcium phosphide reacts vigorously with water to generate phosphine gas.
Ca3P2 (s)+6H2O (l)3Ca(OH)2 (aq.)+2PH3 (g)

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