Correct option (3) Z<1 and attractive forces are dominant
Explanation:
- Compressibility factor \((Z)=V_{\text {res }} / V_{\text {ides }} .\)
\(\therefore V_{\text {rea }} / V_{\text {ideal }} ;\) Hence \(Z<1\)
- If Z < 1, attractive forces are dominant among gaseous molecules and liquefaction of gas will be easy.