Which of the following statements is incorrect?

  • A
    The molecularity of a reaction is independent of temperature and pressure.
  • B
    The order of a reaction depends on temperature and pressure.
  • C
    The order of a reaction is independent of temperature and pressure.
  • D
    The order of a reaction can be derived from the rate expression.

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For the reaction,$PCl_5 \longrightarrow PCl_3 + Cl_2$,the rate and rate constant are $1.02 \times 10^{-4} \ mol \ L^{-1} \ s^{-1}$ and $3.4 \times 10^{-5} \ s^{-1}$ respectively at a given instant. The molar concentration of $PCl_5$ at that instant is

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