Home
Class 12
CHEMISTRY
Assertion : In the extraction of Ag, com...

Assertion : In the extraction of Ag, complex `Na[Ag(CN)_(2)]` is reacted with Zn.
Reason : Zn is d-block transition metal.

A

If both assetion and reason are CORRECT, and reason is the CORRECT explanation of the assertion

B

If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion

C

If assertion is CORRECT but reason is INCORRECT

D

If assertion is INCORRECT but reason is CORRECT

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • METALLURGY

    VK JAISWAL ENGLISH|Exercise MATCH THE COLUMN|20 Videos
  • ENVIRONMENTAL CHEMISTRY

    VK JAISWAL ENGLISH|Exercise ASSERTION-REASON TYPE QUESTIONS|14 Videos
  • p-BLOCK ELEMENTS

    VK JAISWAL ENGLISH|Exercise SUBJECTIVE PROBLEMS|35 Videos

Similar Questions

Explore conceptually related problems

Statement-I : In the extraction of Ag the complex Na[Ag(CN)_(2)] is reacted with Zn Statement-II : Zn is transition metal according to electronic theory

The complex Na_(2)[Fe(CN)_(5)NO] is called :

The hybridisation of Ag in [Ag(NH_3)]_2^(+) complex is

The process of AgCN+KCNtoK[Ag(CN)_(2)] involves the oxidation of Ag.

Explain the following (a) Although Au is soluble in aqua-regia, Ag is not (b) Zinc and hot copper is used for recovery of Ag from the complex [Ag(CN)_(2)]^(-) (c) Aluminium metal is frequently used as a reducing agent for extraction of metal such as chromium manganese etc. (d) Partial roasting of sulphide ore is done in the metallurgy of copper.

STATEMENT-1 : NaCN acts as a depresent for ZnS but does not prevent PbS from the formation of froth. and STATEMENT-2 : NaCN combines with ZnS to form a complex Na_(2)[Zn(CN)_(4)] on the surface of ZnS and thus prevents it from formation of froth.

Assertion : Transition metals are poor reducing agents. Reasons : Transition metals form numerous alloys with other metals.

Assertion: When a solution of Na_(2)ZnO_(2) is acidified with dilute HCl and treated with H_(2)S, a precipitate of ZnS is formed. Reason: Na_(2)ZnO_(2) is decomposed by HCl to give Zn^(2+) ions.

Assertion: Gases are easily adsorbed on the surface of metals, especially transition metals. Reason: Transition metals have free valencies

Ag_(2)S + NaCN + Zn" = "Ag This method of extraction of Ag by complex formation and then its displacement is called

VK JAISWAL ENGLISH-METALLURGY-ASSERTION-REASON TYPE QUESTIONS
  1. Assertion : Wrought iron is more malleable and ductile than steel. R...

    Text Solution

    |

  2. Assertion : Lead, tin and bismuth are purified by liquation method. ...

    Text Solution

    |

  3. Assertion : Al(2)O(3) is converted into Al by reduction with carbon at...

    Text Solution

    |

  4. Assertion : Reduction of ZnO with carbon is done at 1100^(@)C. Reaso...

    Text Solution

    |

  5. Assertion : Desilverisation of lead is done by Parke's method DeltaG. ...

    Text Solution

    |

  6. Statement-I : All the ores are mineral Statement-II : Most of the or...

    Text Solution

    |

  7. Assertion : PbSiF(6)+H(2)SiF(6)+ gelatine is taken as electrolyte in e...

    Text Solution

    |

  8. Assertion : Nitriding is the process of heating steel in presence of N...

    Text Solution

    |

  9. Assertion : Ores are generally converted into oxides, prior to reducti...

    Text Solution

    |

  10. Assertion : In the extraction of Ag, complex Na[Ag(CN)(2)] is reacted ...

    Text Solution

    |

  11. Assertion : Thermite mixture Fe(2)O(3) +Al (powder) is used in the wel...

    Text Solution

    |

  12. Assertion : In froth floatation process sodium ethyl xanthate is used ...

    Text Solution

    |

  13. Assertion: CuFeS(2) is concentrated by froath floatation method Reas...

    Text Solution

    |

  14. Assertion : In the electrolytic reduction of Al(2)O(3), cryolite is us...

    Text Solution

    |

  15. Assertion : Wrought iron is more malleable and ductile than steel. R...

    Text Solution

    |

  16. Assertion : Lead, tin and bismuth are purified by liquation method. ...

    Text Solution

    |

  17. Assertion : Al(2)O(3) is converted into Al by reduction with carbon at...

    Text Solution

    |

  18. Reduction of ZnO with carbon is done at 1100^(@)C. Reason : Delta G^...

    Text Solution

    |

  19. Assertion : Desilverisation of lead is done by Parke's method. Reaso...

    Text Solution

    |

  20. Assertion : All the ores are mineral. ltbr. Reason : Ores contains met...

    Text Solution

    |