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Solution


Q.

Given below are two statements:

Statement I: S8 solid undergoes disproportionation reaction under alkaline conditions to form S2- and S2O32-.

Statement II: ClO4- can undergo disproportionation reaction under acidic condition.

In the light of the above statements, choose the most appropriate answer from the options given below:            [2024]
1 Statement I is correct but statement II is incorrect  
2 Both statement I and statement II are incorrect  
3 Statement I is incorrect but statement II is correct  
4 Both statement I and statement II are correct  

Ans.

(1)

Statement (I): Sulphur, S8 undergoes a disproportionation reaction in the alkaline medium to form sulphide and thiosulphate.

Statement (II): In perchlorate ion (ClO4-), chlorine is in its maximum possible oxidation state i.e. +7. As it cannot be further oxidised it does not show a disproportionation reaction.