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Sodium thiosulphate, Na(2)S(2)O(3).5H(2)...

Sodium thiosulphate, `Na_(2)S_(2)O_(3).5H_(2)O` is used in photography to

A

Reduce AgBr to metallic Ag

B

Remove reduced Ag

C

Remove undecomposed AgBr as a soluble complex

D

Convert metallic Ag to silver salt

Text Solution

Verified by Experts

The correct Answer is:
C

`AgBr+Na_(2)S_(2)O_(3)toNa_(3)[Ag(S_(2)O_(3))_(2)]`
Soluble complex
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In photography , Na_(2)S_(2)O_(3).5H_(2)O is used

Sodium thiosulfate ( Na_2S_2O_3 ) solution is used in photography to

Knowledge Check

  • Na_2S_2O_3. 5H_2O is used in photography to

    A
    Reduce AgBr to metallic Ag
    B
    Remove reduced Ag
    C
    Remove undecomposed AgBr as a soluble complex
    D
    Convert metallic Ag to silver salt
  • The equivalent mass of sodium thiosulphate (Na_(2)S_(2)O_(3). 5H_(2)O) in the reaction, 2Na_(2)S_(2)O_(3)+I_(2) to 2NaI+Na_(2)S_(4)O_(6) is :

    A
    248
    B
    124
    C
    596
    D
    62
  • Na_(2)S_(2)O_(3) is prepared by :

    A
    reaching `H_(2)S_(2)O_(3)` with `NaOH`.
    B
    reacting `Na_(2)SO_(4)` with S is alkaline medium.
    C
    heating `NaOH` and S
    D
    reducing `Na_(2)SO_(4)` with S in acidic medium.
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    12 gm of an impure sample oxide ( As_(2)O_(3) which is acidic in nature ) was dissolved in water containing sodium bicarbonate ( which is basic in nature ) and the resulting solution was diluted to 250 ml. 25 ml of this solution was completely oxidized by 22.4 ml of a solution 24.8 gm of hydrated sodium thiosulphate (Na_(2)S_(2)O_(3).5H_(2)O) in one litre . Calculate the percentage of arsenious oxide in the sample.

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    The density of 3 M solution of sodium thiosulphate (Na_(2)S_(2)O_(3)) is 1.25 g/mL. Calculate amount of sodium thiosulphate

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