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STATEMENT-1 : Zince and not copper is us...

STATEMENT-1 : Zince and not copper is used in the recovery of silver from the complex `[Ag(CN)_(2)]^(-)`
and
STATEMENT-2 : Zince is more powerful oxidising agent than copper.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1

B

Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for Statement-1

C

Statement-1 is True, Statement-2 is False

D

Statement-1 is False, Statement-2 is True

Text Solution

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Why is Zn but not copper used for the recovery of Ag from its cyanide complex [Ag(CN)_(2)]^(-)

Why is zinc and not copper used for the recovery of metallic silver from its cyanide complex [Ag(CN)_2]^(-) ?

Knowledge Check

  • Assertion : Zinc is used for the recovery of silver from the complex [Ag(CN)_(2)]^(-) Reason : Zinc is more electropositive than silver and is a better reducing agent.

    A
    Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
    B
    Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
    C
    Assertion is correct, but reason is wrong statement.
    D
    Assertion is wrong, but reason is correct statement.

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    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 donue in the metallurgy of copper.

    Answer th following questions beriefly (i) What is the actual reducing agent of haematite in blast furnace ? Gicve the equation for the reovery of lead from galena by air reduction ? (iii) Why is sodium choride added during electroysis of used anhydrous magnesium choride ? (iv) ZInc and not copper is used for the recovery of metallic silverfrom complex [Ag(CN)_(2)]^(-) explain. (V) why os chalcocite roasted and not calcined during revery of copper.

    Answer the following questions briefly. (i) What is the actual reducing agent of haematite in blast furnace ? (ii) Give the equations for the recovery of lead from galena by air reduction. (iii) Why is sodium chloride added during electrolysis of fused anhydrous magnesium chloride. (iv) Zinc, not copper, is used for the recovery of metallic silver from the complex [Ag(CN)_(2)] . Explain. (v) Why is chalcocite roasted and not calcinated during recovery of copper ?

    Explain the following : (i) Zinc but not copper is used for the recovery of Ag from [Ag(CN) ""_(2)]^(-) (ii) Partial roasting of sulphide ore is done in the metallurgy of copper. (iii) Why is chalcocite roasted and not calcined during extraction of copper ?

    Zinc is used but not copper for the recovery for metallic silver from the complex [Ag(CN)2]^-, although electrode potentials of both zinc and copper are less than that of Ag. Explain why ?

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