Home
Class 12
CHEMISTRY
In the equation: M+8CN^(-)+2H(2)O+O(2)...

In the equation:
`M+8CN^(-)+2H_(2)O+O_(2)to4[M(CN)_(2)]^(-)+4OH^(-)` metal M is:

A

Copper

B

Iron

C

Gold

D

Zinc

Text Solution

Verified by Experts

The correct Answer is:
C
Least reactive metals like silve (Ag ) and gold (Au) are obtained by cyanide proces. In this process, the impure metal is treated with NaCN (solution ) and air is passed. Metal is converted into soluble complex as `4Au+8CN^(-) +2H_(2)O+O_(2) to underset("Soluble")(4[Au(CN)_(2)]^(-))+4OH^(-)`
Promotional Banner

Topper's Solved these Questions

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|14 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|14 Videos

  • ELECTROCHEMISTRY

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|32 Videos

  • HYDROGEN

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise EXERCISE 2|20 Videos

Similar Questions

Explore conceptually related problems

Following reactions take place during extraction of gold 4Au+8CN^(-)+ 2H_(2)O + O_(2) to 4[Au(CN)_(2)]^(-)+ 4OH^(-) 2[Au(CN)_(2)]^(-) + Zn to 2Au + [Zn(CN)_(4)]^(2-) Zinc in the extraction of gold acts as a/an

Name the metal M which is extracted on the basis of following reactions : 4M + 8CN^(-)+2H_(2)O+O_(2) rarr 4[M(CN)_(2)]^(-)+4OH^(-) 2[M(CN)_(2)]^(-)+Zn rarr [Zn(CN)_(4)]^(2-)+ 2M

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Exercise 2
  1. Sulphide ores of metals are usually concentrated by both floatation pr...

    Text Solution

    |

  2. The fluorspar (CaF2) is added in small quantities in the electrolytic ...

    Text Solution

    |

  3. In the equation: M+8CN^(-)+2H(2)O+O(2)to4[M(CN)(2)]^(-)+4OH^(-) meta...

    Text Solution

    |

  4. Match the following . The correct answer is

    Text Solution

    |

  5. Bell metal is an alloy of

    Text Solution

    |

  6. Specific gravity of slag is

    Text Solution

    |

  7. Match the following Columns and choose the correct option from the co...

    Text Solution

    |

  8. For the reduction of FeO at the temperature corresponding to point D, ...

    Text Solution

    |

  9. Which of the following statement(s) is/are incorrect ? I. Zinc can b...

    Text Solution

    |

  10. Match Column I with Column II and select the correct answer using the ...

    Text Solution

    |

  11. Consider the following reaction at 1000^(@)C (A) Zn (s) + (1)/(2) O...

    Text Solution

    |

  12. In Mac Arthur Forest method, silver is extracted from the solution of ...

    Text Solution

    |

  13. Which method of purification is represented by the following equations...

    Text Solution

    |

  14. In aluminium extraction by Bayer process, alumina is extracted from ba...

    Text Solution

    |

  15. Which of the following statement is incorrect?

    Text Solution

    |

  16. Match the following Columns and choose the correct option from the cod...

    Text Solution

    |

  17. Aluminothermic process is used for the extraction of metals, whose oxi...

    Text Solution

    |

  18. Match the column I and column II and pick the correct matching from th...

    Text Solution

    |

  19. To obtain pure germanium which of the following methods of refining is...

    Text Solution

    |

  20. Which one of the following statement is false ?

    Text Solution

    |