Home
Class 12
CHEMISTRY
(A) Insulators are generally good conduc...

(A) Insulators are generally good conductors (R) Insulators have free electrons

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    AAKASH SERIES|Exercise LEVEL - I (EXERCISE - I)|68 Videos
  • SOLID STATE

    AAKASH SERIES|Exercise LEVEL - I (EXERCISE - II)|77 Videos
  • SOLID STATE

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE -3|22 Videos
  • REVISION EXERCISE

    AAKASH SERIES|Exercise COMPLEX COMPOUNDS|47 Videos
  • SOLIDS STATE

    AAKASH SERIES|Exercise PRACTICE EXERCISE|63 Videos

Similar Questions

Explore conceptually related problems

(A): Metals are generally good conductors of electricity (R) : Electrical conductivity of metals is due to Schottky type defects

(A) Metallic solids are electrical and thermal conductors (R) Metallic solids have mobile electrons

Which allotropes are used as good conductors ? Why ?

An electronic conductor is

Graphite is a good conductor - explain.

(A): Most of good conductors of heat are also good conductors of electricity and vice versa. (R): Mainly electrons are responsible for these conductions.

Graphite is a good conductor. Explain.

(A): Diamond is an insulator and graphite is a conductor. (R): Diamond is used as abrasive and graphite as lubricant.

AAKASH SERIES-SOLID STATE-OBJECTIVE EXERCISE -4
  1. (A) Electrical conductivity of semiconductors increases with increasin...

    Text Solution

    |

  2. (A) On heating ferromagnetic or ferrimagnetic substances, they become ...

    Text Solution

    |

  3. (A) Insulators are generally good conductors (R) Insulators have free...

    Text Solution

    |

  4. (A) Anti ferromagnetic substances posses zero magnetic moment. (R) MnO...

    Text Solution

    |

  5. (A) Ionic solids conduct electricity in solid state. (R) Their conduct...

    Text Solution

    |

  6. (A) Ionic solids are characterized by high melting and boiling point. ...

    Text Solution

    |

  7. (A) Molecular solids are characterized by low melting point. (R) Molec...

    Text Solution

    |

  8. (A) Amorphous Substances are isotropic (R) Properties like refractive ...

    Text Solution

    |

  9. (A) Conductivity of silicon increases by doping it with group-15 eleme...

    Text Solution

    |

  10. (A) Cadmium sulphide is perfectly covalent (R) The difference of elect...

    Text Solution

    |

  11. (A) Crystalline solids are anisotropic in nature (R) Crystalline subs...

    Text Solution

    |

  12. (A) Packing efficiency of hep and CCP are not equal (R) hep, ccp both ...

    Text Solution

    |

  13. (A) Visible light can not be used to study crystals (R) The wave lengt...

    Text Solution

    |

  14. (A) All covalent solids are non conductors (R) Graphite is a ionic so...

    Text Solution

    |

  15. (A) I(2), CO(2) have low melting point (R) I(2), CO(2) have weak disp...

    Text Solution

    |

  16. (A) Metallic solids are electrical and thermal conductors (R) Metallic...

    Text Solution

    |

  17. (A) Orthorhombic crystal system has four Bravis lattices (R) Orthorhom...

    Text Solution

    |

  18. (A) F- centre brings about colour (R) Vacancy with a trapped cation is...

    Text Solution

    |

  19. (A) Zinc oxide is yellow coloured when hot (R) Zinc oxide has metal e...

    Text Solution

    |

  20. (A) : Crystalline solids have sharp and chara cteric melting points. ...

    Text Solution

    |