Home
Class 12
CHEMISTRY
The decomposition of phosphine (PH3) on ...

The decomposition of phosphine (`PH_3`) on tungsten at low pressure is a first-order reaction. It is because the

A

rate is proportional to the surface coverage

B

rate is inversely proportional to the surface coverage

C

rate is independent of the surface coverage

D

rate of decomposition is very slow.

Text Solution

Verified by Experts

The correct Answer is:
A
At low pressure, rate is proportional to the surface coverage and is of first order while at high pressure, it follows zero order kinetics due to complete coverage of surface area.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    MTG GUIDE|Exercise CHECK YOUR NEET VITALS|25 Videos

  • BIOMOLECULES

    MTG GUIDE|Exercise AIPMT/NEET (MCQS)|19 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    MTG GUIDE|Exercise AIPMT/NEET |9 Videos

Similar Questions

Explore conceptually related problems

Catalytic decomposition of phoshine on hot tungsten at high pressure is _______ reaction .

Assertion : The decomposition of gaseous ammonia on a hot platinum surface is a zero order reaction at high pressure. For a zero order reaction the rate of reaction is independent of initial concentration.

MTG GUIDE-CHEMICAL KINETICS-AIPMT/NEET (MCQs)
  1. The rate of the reaction, 2NO + Cl2 rarr 2NOCI is given by the rat...

    Text Solution

    |

  2. Which one of the following statements for the order of a reaction is i...

    Text Solution

    |

  3. The rate of the reaction : 2N2O5 rarr 4NO2 + O2 can be written in thre...

    Text Solution

    |

  4. The unit of rate constant for a zero order reaction is

    Text Solution

    |

  5. In a reaction, A + B rarr product, rate is doubled when the concentrat...

    Text Solution

    |

  6. In a zero-order reaction for every 10^@C rise of temperature, the rate...

    Text Solution

    |

  7. Activation energy (Ea) and rate constants (k1" and "k2) of a chemical ...

    Text Solution

    |

  8. What is the activation energy for a reaction if its rate doubles when ...

    Text Solution

    |

  9. The activation energy of a reaction can be determined from the slope o...

    Text Solution

    |

  10. When initial concentration of a reactant is doubled in a reaction, its...

    Text Solution

    |

  11. The rate constant of the reaction A rarr B is 0.6 xx 10^(-3) mol L^(-1...

    Text Solution

    |

  12. The rate of first-order reaction is 0.04 mol L^(-1)s^(-1) at 10 second...

    Text Solution

    |

  13. The addition of a catalyst during a chemical reaction alters which of ...

    Text Solution

    |

  14. The decomposition of phosphine (PH3) on tungsten at low pressure is a ...

    Text Solution

    |

  15. Mechanism of a hypothetical reaction X2+Y2rarr2XY, is given below ...

    Text Solution

    |

  16. A first order reaction has a specific reaction rate of 10^(-2) sec^(-1...

    Text Solution

    |

  17. The correct difference between first and second order reactions is tha...

    Text Solution

    |

  18. When initial concentration of the reactant is doubled, the half-life p...

    Text Solution

    |

  19. If the rate constant for a first order reaction is k, the time (t) req...

    Text Solution

    |

  20. For the chemical reaction, N(2(g)) + 3H(2(g)) hArr2NH(3(g)) the correc...

    Text Solution

    |