States of Matter - Result Question 31
31. The density of neon will be highest at
(1990,1 M)
(a) STP
(b) $0^{\circ} C, 2 \hspace {1mm} atm$
(c) $273^{\circ} C, 1 \hspace {1mm} atm$
(d) $273^{\circ} C, 2 \hspace {1mm} atm$
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Answer:
Correct Answer: 31. (b)
Solution:
The ideal gas equation, $p V=n R T=\dfrac{w}{M} R T$
$\Rightarrow p M =\left(\dfrac{w}{V}\right) R T=d R T \quad(d=\text { density }) $
$\Rightarrow d =\dfrac{p M}{R T}$
i.e. density will be greater at low temperature and high pressure.
BETA
