Select the correct statement out of the following :

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PH3 has garlic smell

It is non-poisonous

PH3 is more basic than NH3

In the presence of sunlight aqueous solution of PH3 decomposes slowly to give H2 gas and red phosphorus

answer is A.

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Detailed Solution

PH3 has rotten fish smell. It is highly poisonous. It is much less basic than NH3 due to lower electronegativity of phosphorus (2.11) than nitrogen (2.5).PH3 decomposes to phosphorus and H2 in aqueous solution but quite slowly.

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