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What mass of H2C2O4. 2H2O (mol.mass=126)...

What mass of `H_2C_2O_4. 2H_2O` (mol.mass`=126`) should be dissolved in water to prepare `250mL` of centinormal solution which act as a reducing agent ?

A

0.63g

B

0.1575g

C

0.126g

D

0.875g

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • In which reaction H_2O_2 acts reducing agent ?

    A
    `Ag_(2)O +H_2O_2 + 2Ag + H_(2)O + O_2`
    B
    `2KI + H_(2)O_(2) rarr 2KOH + I_2`
    C
    ` PbS + 4H_2O_ 2rarrPbSO_4 + 4H_2O`
    D
    `H_2O_2 +SO_2 rarr H_(2)SO_4`

  • In which of the following reaction, H_2O_2 is acting as a reducing agent

    A
    `SO_2 + H_2O_2 to H_2SO_4`
    B
    `2KI + H_2O_2 to 2KOH + I_2`
    C
    `Ag_2O + H_2O_2 to 2Ag + H_2O + O_2`
    D
    `PbS + 4H_2O_2 to PbSO_4 + 4H_2O`

  • In which of the following reactions, H_(2)O_(2) acts as a reducing reagent ?

    A
    `PbS_((s))+4H_(2)O_(2(aq))overset(H^(-))(to)PbSO_(4(s))+4H_(2)O_((l))`
    B
    `HOCl+H_(2)O_(2)overset(H^(-))(to)H_(3)O^(+)+Cl^(-)+O_(2)`
    C
    `Mn^(2+)+H_(2)O_(2)overset(HO^(-))(to)Mn^(4+)+2OH^(-)`
    D
    `2Fe^(2+)+H_(2)O_(2)overset(OH^(-))(to)2Fe^(3+)+2OH^(-)`

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    H_(2)C_(2)O_(4).2H_(2)O (Mol wt =126) can be oxidised into CO_(2) by acidified KMnO_(4) . 6.3 gms of oxalic acid can not be oxidised

    The volume of 40 vol. H_(2)O_(2) solution required to prepare 2L. of O_(2) at STP is

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