Which of the following is not correct?

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(D) The reaction between sodium thiosulphate $(Na_2S_2O_3)$ and iodine $(I_2)$ is given by: $2Na_2S_2O_3 + I_2 \rightarrow Na_2S_4O_6 + 2NaI$ In this

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Sodium thiosulphate reacts with iodine to form sodium sulphate.

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(D) The reaction between sodium thiosulphate $(Na_2S_2O_3)$ and iodine $(I_2)$ is given by: $2Na_2S_2O_3 + I_2 \rightarrow Na_2S_4O_6 + 2NaI$ In this reaction, sodium thiosulphate is oxidised to sodium tetrathionate $(Na_2S_4O_6)$. Therefore, option $A$ is correct. Sodium thiosulphate is highly soluble in water, so option $B$ is correct. Ozone reacts with alkenes to form ozonides, which is a standard test for unsaturation, so option $C$ is correct. Option $D$ states that sodium thiosulphate reacts with iodine to form sodium sulphate, which is incorrect as it forms sodium tetrathionate.

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