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Chlorine oxidizes sodium thiosulphate to...

Chlorine oxidizes sodium thiosulphate to form

A

`Na_(2)SO_(3)`

B

`Na_(2)O`

C

`Na_(2)SO_(4)`

D

`Na_(2)CO_(3)`

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The correct Answer is:
C
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Sodium thiosulphate is formed when:

632 g of sodium thiosulphate (a_(2)S_(2)O_(3)) reacts with copper sulphate to form cuproc thiosulphate which is reduced by sodium thiosulphate to give cuprous compound which is dissolved in excess of sodium thiosulphate to form a complex compound sodium cuprothisosulphate (Na_(4)[Cu_(6)(S_(2)O_(3))_(5)]) , (MW=1033) CuSO_(4) + Na_(2)S_(2)O_(3) rarr CuS_(2)O_(3) + Na_(2)SO_(4)" " [very fast] 2CuSO_(4)+Na_(2)S_(2)O_(3)+Na_(2)S_(2)O_(3) rarr Cu_(2)S_(2)O_(3) + Na_(2)S_(4)O_(6) 3Cu_(2)S_(2)O_(3) + 2Na_(2)S_(2)O_(3) rarr Na_(4)[Cu_(6)(S_(2)O_(3))_(5)] " " (Sodium cuprothisoulphate ) In this process , 0.2 mole of sodium cuprothiosulphate is formed .(O=16 , Na=23 , S=32) It instead of given amount of sodium thiosulphate, 2 moles of sodium thiosulphate along with 3 moles of CuSO_(4) were taken initially . Then, moles of sodiu cuprothiosulphate formed is:

Sodium thiosulphate is prepared by

How will you prepare the following (a) sodium carbonate from sodium chloride (b) Sodium thiosulphate from sodium sulphite (c ) Sodium cyanide from sodium metal. (d) Sodium silicate from silica.

When chlorine is bubbled through sodium thiosulphate solution what is formed ?

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