Positive deviation from ideal behaviour takes place because of

Options

A. The molecular interaction between atom and `PV//nRTgt1`
B. The molecular interaction between atom and `PV//nRTlt1`
C. The finite size of atoms and `PV//nRTgt1`
D. The finite size of atoms and `PV//nRTlt1`

Explanation

Compressibility factor
`Z=(PV)/(nRT)`
For ideal gas, `Z=1(PV=nRT)`
For ideal gas, `Zne1(PVnenRT)`
`Z gt 1(PVgtnRT)` is called positive deviation.
`Z lt 1(PVltnRT)` is called negative deviation.
The variation is due to molecular interactions.