Figure represents on the log-log scale pressure (P) dependence of adiabatic compressibility (K) of two gasses. Mark the correct option/s.

Options

A. Line 1 & 2 may represent monoatomic and diatomic gas respectively.
B. Line1 & 2 may represent diatomic and monoatomic gasses respectively.
C. Degree of freedom for the gas represented by line 1 is more then the degree of freedom for line 2
D. Degree of freedom for the gas represented by line 2 is more than the degree of freedom for line 1.

Answer

B, C

Explanation

Adiabatic compressibility (K) `=1//(gammaP)` Taking log
In `K=-l ngammaP=-l nP-l ngamma`
Let `l nK=y,l nP=x and l ngamma=c`
` Rightarrow y=-x-c`
intercept on y axis is-c `=-l n gamma`
`Rightarrow gamma_(2) gt gamma_(1)`
Higher `gamma` means lower atomicity and lower degree of freedom. So (B) and (C)