Home
Class 12
CHEMISTRY
Assertion: A catalyst is more effective ...

Assertion: A catalyst is more effective in finely divided form.
Reason: Finely divided form has more surface area.

A

If both assertion and reason are terue and the reason is the correct explanation of the assertion .

B

If both assertion ans reason are true but reason is not the correct explanation of the assertion .

C

If assertion is true but reason is false .

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A

A catalyst is more effective in finely divided form because finely divided form has more surface area. Therefore there is an increase in active centres on the surcface .
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST

    A2Z|Exercise Assertion-Reasoning|5 Videos
  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS

    A2Z|Exercise Section D - Chapter End Test|30 Videos
  • ORGANIC COMPOUNDS CONTAINING HALOGENS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

each question constain STATEMENT-1(Assertion ) and STATEMENT - 2 (reason). examine the statement carefully and work the correct answer accoridng to the instructions given below : STATEMENT-1: A catalyst is more effective in finely divided form. STATENENT-2: Finely divided form has more surface area.

Catalysts are more effective in

Assertion :- Catalyst is more effective in powdered form. Reason :- Number of free valencies increase.

A catalyst in the finely divided form is most effective because :

If a solid is finely divided:

Assertion : Catalysts increase the reaction velocity. Reason : Catalysts provide large surface area for reactions to occur.

Finely divided iron combines with CO to give

A2Z-MOCK TEST-Mock Test 2
  1. Select the incorrect statement for a dry cell:

    Text Solution

    |

  2. The rate constatnt of a second order reaction is 10^(-2) "mol"^(-1) l...

    Text Solution

    |

  3. Which statement about enzymes is not corect ?

    Text Solution

    |

  4. Formic acid is obtained when :

    Text Solution

    |

  5. Whin (NH4)2SO4 are heated, we get :

    Text Solution

    |

  6. The destruction of the biological bature and activity of proteins by h...

    Text Solution

    |

  7. The weakest interparticle forces are present in :

    Text Solution

    |

  8. Cerium (Z= 58) is an important nember of the lanthanoids . Which of th...

    Text Solution

    |

  9. One mole of complex compound Co(NH3)5Cl3 gives 3 moles of ions on diss...

    Text Solution

    |

  10. Consider the reaction, Cl(2)(aq) + H(2)S(aq) rarr S(s) + 2H^(+) (aq)...

    Text Solution

    |

  11. The molality of a urea solution in which 0.0100 g of urea, [(NH(2))...

    Text Solution

    |

  12. Consider the acidity of the carboxylic acids: (1) PhCOOH (2) o-NO(...

    Text Solution

    |

  13. Ortho -nitrophenol is less soluble in water than p-and m-nitrophenols ...

    Text Solution

    |

  14. The compound formed on heation cholrobenzed with cholral in presence ...

    Text Solution

    |

  15. For the complete combustion of ethanol, C(2)H(5)OH(l)+3O(2)(g)rarr2CO(...

    Text Solution

    |

  16. For the Daniell cell Zn| Zn^(2+) || Cu^(2+) | Cu with The questions c...

    Text Solution

    |

  17. Assertion: A catalyst is more effective in finely divided form. Reas...

    Text Solution

    |

  18. For the Daniell cell Zn| Zn^(2+) || Cu^(2+) | Cu with The questions c...

    Text Solution

    |

  19. For the Daniell cell Zn| Zn^(2+) || Cu^(2+) | Cu with The questions c...

    Text Solution

    |

  20. For the Daniell cell Zn| Zn^(2+) || Cu^(2+) | Cu with The questions c...

    Text Solution

    |