Single Choice

For the preparation of sodium thiosulphate by Springs reaction, the reactants used are :

A$$Na_{2}S+Na_{2}SO_{3}+Cl_{2}$$
B$$Na_{2}S+SO_{2}$$
C$$Na_{2}S+Na_{2}SO_{3}+I_{2}$$
Correct Answer
D$$Na_{2} SO_{3} + S$$

Solution

Springs reaction for the preparation of sodium thiosulphate is given below:

$$ { Na }_{ 2 }{ S + Na }_{ 2 }{ S }O_{ 3 } + { I }_{ 2 } \longrightarrow { Na }_{ 2 }S_{ 2 }{ O }_{ 3 } + 2 NaI $$

Hence, option C is correct.

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