Home
Class 12
CHEMISTRY
Give reason (one each) for the following...

Give reason (one each) for the following:
(a) Transition metals are good catalytic agent
(b) Second ionisation enthalpy of copper is very high.
(c) The spin only magnetic moment of `Sc^(3+)` is zero (Z = 21).

Text Solution

Verified by Experts

(a) Multiple oxidation state or (i) incompletely filled d-orbitals
(c) `Sc^(3+)` has do configuration no .d. electrons `mu = 0`
Promotional Banner

Topper's Solved these Questions

  • D - BLOCK ELEMENTS F - BLOCK ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC-1 (D - BLOCK ELEMENTS, THEIR PROPERTIES AND COMPONDS)LONG ANSWER TYPE QUESTIONS - II|12 Videos

  • D - BLOCK ELEMENTS F - BLOCK ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC - 2 (F - BLOCK ELEMENT , LANTHANOIDS AND ACTINOIDS)(VERY SHORT ANSWER TYPES QUESTIONS)|17 Videos

  • D - BLOCK ELEMENTS F - BLOCK ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC-1 (D - BLOCK ELEMENTS, THEIR PROPERTIES AND COMPONDS)(SHORT ANSWER TYPE QUESTIONS - I)|30 Videos

  • CO-ORDINATION COMPOUNDS

    OSWAAL PUBLICATION|Exercise TOPIC-2 (WERNER.S THEORY BONDING IN CO-ORDINATION COMPOUND , VBT, CFT AND IMPORTANCE OF CO-ORDINATION COMPOUNDS) (Very Answer Type Questions)|19 Videos

  • ELECTRO-CHEMISTRY

    OSWAAL PUBLICATION|Exercise Topic - 3 ELECTROLYSIS , LAWS OF ELECTROLYSIS, BATTERIES, FUEL CELLS AND CORROSION (LONG ANSWER TYPE QUESTIONS)|4 Videos

Similar Questions

Explore conceptually related problems

Give reason (one each) for the following. a) Transition metals are good catalytic agents. b) Second ionisation Enthalpy of copper is very high. c) The spin only magnetic moment of Sc^(3+) is zero (Z = 21) .

Give reason (one each) for the following : Transition metal are good catalytic agent

Give reason (one each) for the following : Second ionisation enthalpy of copper is very high.

Give reason (one each) for the following : The spin only magnetic moment of Se^(3+) is zero (Z=21)

(a) 3d Transition metals and their compounds are good catalysts. Give two reasons?2 (b) Give the formula for the calculation of spin only magnetic moment.

Give reasons for the following: a. Ionic compounds in general have high melting and boiling points. b. Highly reactive metals cannot be obained from their oxides by heating them with carbon. c. Copper vessel get a green coat when left exposed to air in the rainy season.

The elements Be, Mg, and 20Ca each having two valence electrons in their valence shells are in periods 2, 3, and 4 respectively of the Modern Periodic Table. Answer the following questions associated with these elements, giving reason in each case. a] In which group should they be? b] Which one of these is least reactive? c] Which one of them has the largest atomic size?

OSWAAL PUBLICATION-D - BLOCK ELEMENTS F - BLOCK ELEMENTS -TOPIC-1 (D - BLOCK ELEMENTS, THEIR PROPERTIES AND COMPONDS) LONG ANSWER TYPE QUESTIONS - I
  1. (a) Transition metals show variable oxidation states. Explain. (b) Whi...

    Text Solution

    |

  2. How is K(2)Cr(2)O(7) manufactured from chromite ore.

    Text Solution

    |

  3. (i) Write the two chemical equations to show the inter conversion of ...

    Text Solution

    |

  4. D-block elements form co-ordination compounds. Give reasons.

    Text Solution

    |

  5. Name the metal of the 1^(st) row transition series that (i) has maxi...

    Text Solution

    |

  6. Write ionic equations for the reaction of dichromate ions with (i) h...

    Text Solution

    |

  7. (a) What are interstitial compounds ? Write any one of their character...

    Text Solution

    |

  8. (a) Which gas is liberated when (i) crystals of potassium permangan...

    Text Solution

    |

  9. Give reason : (i) Most of the transition metals have high melting po...

    Text Solution

    |

  10. (i) What happens when H2S is passed into potassium dichromate in acidi...

    Text Solution

    |

  11. (a) Transition metals and their compounds are used as catalysts. Give ...

    Text Solution

    |

  12. How is potassium permanganate (KMnO(4)) prepared from MnO(2) ? Write t...

    Text Solution

    |

  13. Give reason (one each) for the following: (a) Transition metals are ...

    Text Solution

    |

  14. With reference to the first row transition series: i) Name the metal...

    Text Solution

    |

  15. What may be the stable oxidation state of the transition element with ...

    Text Solution

    |

  16. Explain colour of transition metal compounds based on crystal field sp...

    Text Solution

    |

  17. For M^(2+)//M and M^(3+)//M^(2+) systems the E0 values for some metals...

    Text Solution

    |

  18. Predict which of the following will be coloured in aqueous solution ? ...

    Text Solution

    |

  19. How would you Account for the following: (i) Of the d^4 species, Cr^...

    Text Solution

    |

  20. Comment on the statement that elements of the first transition series ...

    Text Solution

    |