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NEET-XII-Chemistry

Previous Year Paper year:2017

with Solutions - page 6
  • #84
    A gas at 350 K and 15 bar has molar volume
    20 percent smaller than that for an ideal gas
    under the same conditions. The correct
    option about the gas and its compressibility
    factor (Z) is :
    (1) Z > 1 and attractive forces are dominant
    (2) Z > 1 and repulsive forces are dominant
    (3) Z < 1 and attractive forces are dominant
    (4) Z < 1 and repulsive forces are dominant
    digAnsr:   3
    Ans : ( 3 )
    Sol. • Compressibility factor(Z) = real
    ideal
    V
    V
    ∵ V
    real
    < V
    ideal
    ; Hence Z < 1
    • If Z < 1, attractive forces are dominant
    among gaseous molecules and
    liquefaction of gas will be easy.