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Question

In a process, the density of a gas remains constant. If the temperature is doubled, then the change in pressure will be:


A
100% increase 
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B
200% increase 
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C
50% decrease 
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D
25% decrease
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Solution

The correct option is C 100% increase 
We have
ρ=PMRT
ρ=constant
P1MRT1=P2MRT2
P1T1=P2T2 
P1T1=P22T1
P2=2P1 
Change in pressure = P2P1P1×100
=2P1P1P1×100
=100%
Since PT, P will increase by 100%.

Physics

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