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Assertion : PbSiF(6)+H(2)SiF(6)+ gelatin...

Assertion : `PbSiF_(6)+H_(2)SiF_(6)+` gelatine is taken as electrolyte in electrolytic refining of lead.
Reason : Discharge potential of `Pb^(2+)` is less than `H^(+)`.

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 : 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

Verified by Experts

The correct Answer is:
c
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In H_(2)SiF_(6) the covalency of silicon is

Statement-I : Aqueous solution of Na_(2)SO_(4) on electrolysis gives H_(2) and O_(2) gases in cathode and anode respectively. Statement-II : Discharge potential on H^(o+) is less than Na^(+) but discharge potential of OH^(-) is more than SO_(4)^(2-) .

Assertion (A): Magnesium can be obtained by the electronlysis of aqueous solution of MgCl_(2) . Reason (R ): The electrode potential of Mg^(2+) is much higher than H^(o+) .

Knowledge Check

  • Statement - 1 : PbSiF_(6) + H_(2) SiF_(6) + gelatine is taken as electrolyte in electrolytic refining of lead . Statement -2 : Discharge potential of Pb^(2+) is less than H^(+) .

    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 : 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

  • Assertion : Magnesium can be prepared by the electrolysis of aq. MgCl_2 . Reason : The reduction potential of Mg^(2+) is much lower than that of H^(+) .

    A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
    B
    If both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
    C
    If Assertion is true and Reason is false.
    D
    If Assertion is false and Reason is true

  • In H_(2)SiF_(6) the covalency of silicon is

    A
    2
    B
    4
    C
    6
    D
    8