Home
Class 12
CHEMISTRY
Assertion (A) : in CsCl crystal, Cs^(o+)...

Assertion (A) : in `CsCl` crystal, `Cs^(o+)` ions asopt bcc arragement.
Reason (R ) : For `N` atoms adopting bcc arragement, there are `2N OVs`.
a.If both `(A)` and `(R)` are correct, and `(R)` is the correct explanation of `(A)`
b.If both `(A)` and `(R)` are correct, but `(R)` is not the correct explanation of `(A)`
c.If `(A)` is correct, but `(R)` is incorrect.
d.If both `(A)` is incorrect, but `(R)` is correct.

A

If both `(A)` and `(R)` are correct, and `(R)` is the correct explanation of `(A)`

B

If both `(A)` and `(R)` are correct, but `(R)` is not the correct explanation of `(A)`

C

If `(A)` is correct, but `(R)` is incorrect.

D

If both `(A)` is incorrect, but `(R)` is correct.

Text Solution

Verified by Experts

The correct Answer is:
C
(A) is correct but (R) is wrong.
Correct (R): For `N` atoms adopting fcc arrangement, there are `2NTVs`.
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Interger)|9 Videos

  • SOLID STATE

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Fill In The Blanks)|15 Videos

  • SOLID STATE

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Single Correct)|72 Videos

  • REDUCTION AND OXIDATION REACTION OF ORGANIC COMPOUNDS

    CENGAGE CHEMISTRY ENGLISH|Exercise SUBJECTIVE TYPE|4 Videos

  • SOLUTIONS

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 2.3 (Objective)|9 Videos

Similar Questions

Explore conceptually related problems

Assertion (A) : CsCl crystal, the coordination number of Cs^(o+) ion is 8 . Reason (R ) : Cl^(ɵ) ion in CsCl adopt bcc type of packing, a.If both (A) and (R) are correct, and (R) is the correct explanation of (A) b.If both (A) and (R) are correct, but (R) is not the correct explanation of (A) c.If (A) is correct, but (R) is incorrect. d.If both (A) is incorrect, but (R) is correct.

Assertion (A): I_(2) can displace Cl_(2) form NaClO_(3) . Reason (R ): I is more electronegative than CI. If both (A) and (R) are correct, and (R) is the correct explanation of (A) If both (A) and (R) are correct, but (R) is not the correct explanation of (A). If (A) is correct, but (R) is incorrect. If (A) is incorrect, but (R) is correct.

Assertion (A) : In sodium chloride crystal, the coordination number of Na^(o+) IS 6 . Reason (R ) : The sodium atom is smaller than chloring atom. a.If both (A) and (R) are correct, and (R) is the correct explanation of (A) b.If both (A) and (R) are correct, but (R) is not the correct explanation of (A) c.If (A) is correct, but (R) is incorrect. d.If both (A) is incorrect, but (R) is correct.

Assertion (A) : Galvanized iron is protected from Rusting. Reason (R): Zn is less reactive than Fe . (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) . (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A) . (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, (R) is correct.

Assertion (A): The flourine has lower reactivity. Reason (R ): F-F bond has low bond dissociation energy. If both (A) and (R) are correct, and (R) is the correct explanation of (A) If both (A) and (R) are correct, but (R) is not the correct explanation of (A). If (A) is correct, but (R) is incorrect. If (A) is incorrect, but (R) is correct.

Assertion (A) : Group- 15 -doped crystal of Si are called n -type semiconductors. Reason (R ) : Neutrons are responsible for the semi-conducting properties. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A) (c)If (A) is correct, but (R) is incorrect. (d)If both (A) is incorrect, but (R) is correct.

Assertion (A): Na^(o+) ions are discharged in preference to H^(o+) ions at Hg cathode. Reason (R) : The nature of the cathode can affect the order of discharge of ions. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) . (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A) . (c)If (A) is correct, but (R) is incorrect. (d) If (A) is incorrect, (R) is correct.

Assertion: A reaction cannot become fast by itself unless a catalyst is added. Reason: A catalyst always increases the speed of a reaction. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is the correct explanation of (A). (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, but (R) is correct.

Assertion: La should be the f-block element according to Aufbau principle. Reason: 57th electron exceptionally enters in 5d orbital. If both (A) and (R) are correct and (R) is the correct explanation of (A). If both (A) and (R) are correct, but (R) is not the correct explanation of (A). If (A) is correct, but (R) is incorrect. If (A) is incorrect but (R) is correct.

Assertion (A) : Cu gets readily corroded in acidic aqueous solution. Reason (R) : Free energy of the process is positive. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) . (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A) . (c)If (A) is correct, but (R) is incorrect. (d)If both (A) and (R) are incorrect.

CENGAGE CHEMISTRY ENGLISH-SOLID STATE-Exercises (Assertion-Reasoning)
  1. Assertion (A) : in CsCl crystal, Cs^(o+) ions asopt bcc arragement. ...

    Text Solution

    |

  2. Assertion (A) : CsCl crystal, the coordination number of Cs^(o+) ion i...

    Text Solution

    |

  3. Assertion (A) : In sodium chloride crystal, the coordination number of...

    Text Solution

    |

  4. Assertion (A) : The density of crystal having Schottky defect is lowe...

    Text Solution

    |

  5. Assertion (A) : In sodium chloride crystal, Na^(o+) ions occupy OVs wh...

    Text Solution

    |

  6. Assertion (A) : Solids containing F centres are paramagnetic. Reason...

    Text Solution

    |

  7. STATEMENT -1 : Electrical consuctivity of semi -conductors incresase ...

    Text Solution

    |

  8. Assertion (A) : Group-13-doped crystals of Si are called p-type semico...

    Text Solution

    |

  9. Assertion (A) : Group-15-doped crystal of Si are called n-type semicon...

    Text Solution

    |

  10. Assertion (A) : Non-stoichiometric compounds are called Bertholide com...

    Text Solution

    |

  11. Assertion (A) : Graphite is an example of tetragonal crystal system. ...

    Text Solution

    |

  12. Assertion (A) : The size of a cation is larger in TV than in OV. Rea...

    Text Solution

    |

  13. STATEMENT -1 : Antiferromagnetic subatance becomes paramagentic on he...

    Text Solution

    |

  14. Assertion (A) : Zinc blende and wurtzite both have fcc arrangement of ...

    Text Solution

    |

  15. Assertion (A) : Covalent crystals have higher melting point. Reason ...

    Text Solution

    |

  16. Assertion (A) : hcp is more closely packed than ccp. Reason (R ) : h...

    Text Solution

    |

  17. Assertion (A) : Frenkel defects are shown by AgX. Reason (R ) : Ag^(...

    Text Solution

    |

  18. Assertion (A) : Triclinic systeam is the most unsymmetrical systeam. ...

    Text Solution

    |

  19. Assertion (A) : In the rock salt type structure, all the OV(s) are occ...

    Text Solution

    |