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Q.

100 mL of PH3 on decomposition, produced phosphorus and hydrogen. The change in volume is

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a

500 mL decrease

b

Nil

c

900 mL decrease

d

50 mL increase

answer is A.

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Detailed Solution

2PH32 ml100 ml→2P(solid)+3H23 ml150 ml
Increase in volume = 150 ml - 100 ml = 50 ml increase.

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