Some Basic Concepts Of Chemistry Question 199
Question: $ 100\ mL $ of $ PH _3 $ on decomposition produced phosphorus and hydrogen. The change in volume is [MNR 1986]
Options:
A) $ 50\ mL $ increase
B) $ 500\ mL $ decrease
C) $ 900\ mL $ decrease
D) Nil.
Show Answer
Answer:
Correct Answer: A
Solution:
$ \underset{100ml}{\mathop{\underset{2ml}{\mathop{2PH _3}},}},\to \underset{\text{(solid)}}{\mathop{2P}},+\underset{150ml}{\mathop{\underset{3ml}{\mathop{3H _2}},}}, $ Increase in volume $ =150ml-100ml=50ml $ increase.
