Home
Class 12
CHEMISTRY
(A) In any ionic solid with Schottky def...

(A) In any ionic solid with Schottky defects the number of positive and negative ions is same. (R) Equal number of cation and anion vacan­cies are present

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:
A
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

In Fe_(0.96)O , per one Avogadro number of oxide ions, x xx 10^(22) Avagadro number of cation vacancies are present x value is

(A) Between any two given energy levels, the number of absorption transitions is always less than or equal to the number of emission transitions. (R): Absorption transitions start from the lowest energy level only and may end at any higher energy level. But emission transitions may start from any higher energy level and end at any energy level below it.

(A) Crystals exhibiting Frenkel type defects do not show any change in density due to defect (R) In Frenkel defect the interstitial cations and cation vacancies are equal in number

In the crystallisation of 71.75 grams of AgCl , in molten state 1 xx 10^(4) mole of cadmium chloride is added to cause impurity defect. Calculate (a) the number of Ag^+ ions present, (b) the number of Cd2+ ions present and (c) the number of lattice vacancy defects.

10 moles of NaF and 10 moles of AlF_(3) are mixed and uniformly recrystallised to get an FCC Lattice of Fluoride ions. The number of cationic octahedral vacancies formed due to this is 5x. What is x ? (Cations occupy 'oh' voids)

Assertian (A)Equal males of dfferent substance contain sme number of constituent particle. Reason (R) Equal weight of different substance contain the same number of connstituent particle. The correct answer is s

Avogadro's lasw states that under conditions of constant temp. and pressure equal volume of gases contain equal no. of particles. Experimental investigation shows that at one atmosphere pressure and a temperature of 273 k, one mole of any gas occupies a volume of which is very close to 22.4 lit. Therefore, the number of moles in any gas sample canbe found by comparing its volume at STP with 22.4 lit. Number of gram atoms of oxygen present in 0.3 gram mole of H_(2)C_(2)O_(4).2H_(2)O is

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The size of iso electronic species -F^(-) , Na^(+) and Mg^(2+) is effected by

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The correct order of radii is

AAKASH SERIES-SOLID STATE-OBJECTIVE EXERCISE -4
  1. (A) Conductivity of silicon increases by doping it with group-15 eleme...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  13. (A) Diamond and graphite are polymorphic forms (R) Carbon adopts diffe...

    Text Solution

    |

  14. (A) : During vacancy defect the density of solid decreases (R): The ...

    Text Solution

    |

  15. (A) : In many crystal structures of ionic substances cations occupy th...

    Text Solution

    |

  16. (A) Single crystals are formed when the process of crystallization is ...

    Text Solution

    |

  17. (A): Crystalline solids are anisotropic (R): Crystalline solids are ...

    Text Solution

    |

  18. (A) In any ionic solid with Schottky defects the number of positive an...

    Text Solution

    |

  19. (A) Every substance is super conducting at room temperature. (R) A sup...

    Text Solution

    |

  20. (A) All types of magnetic solids become paramagnetic at elevated tempe...

    Text Solution

    |