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NEET-XII-Chemistry

exam-2 year:2016

with Solutions - page 2
Qstn# 160 Prvs-QstnNext-Qstn
  • #160
    The decomposition of phosphine (``PH_3``) on tungsten
    at low pressure is a first-order reaction. It is because
    the
    (1) rate is independent of the surface coverage
    (2) rate of decomposition is very slow
    (3) rate is proportional to the surface coverage
    (4) rate is inversely proportional to the surface
    coverage
    digAnsr:   3
    Ans : (3)
    Sol. The decomposition of PH3 on tungsten at low
    pressure is a first order reaction because rate is
    proportional to the surface coverage.