Excess of Kl reacts with CuSO₄ solution and then Na₂S₂O₃ solution is added to it. Which of the statements is incorrect for this reaction?

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

Na₂S₂O₃is oxidised

Cul₂ is formed

CO₂ +O₂ is formed

Evolved I₂ is formed

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Copper sulphate reacts with potassium iodide to form cuprous iodide and iodine.
2CuSO₄+4KI→Cu₂I₂↓+I₂+2K₂SO₄
Thus, CuI₂ is not formed in this reaction.
Hence, the option B is incorrect and option A is correct.
The liberated iodine is titrated with sodium thiosulphate to form sodium tetrathionate.
2Na₂S₂O₃+I₂→Na₂S₄O₆+2NaI
Iodine is reduced and sodium thiosulphate is oxidized.