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← JEE Advanced 2025 · Paper 2
ChemistrySingle correct+3 / -1Question 34 of 48

JEE Advanced 2025 · Paper 2, Chemistry question 2

The complete hydrolysis of ICl\ce{ICl}, ClFX3\ce{ClF3} and BrFX5\ce{BrF5}, respectively, gives

Choose one option
Answer and worked solution

Official answer: A

Hydrolysis keeps the oxidation state of the less electronegative (central) halogen:

Compound Central halogen Oxoanion formed
ICl\ce{ICl} I(+1) IOX−\ce{IO-} (via HOI)
ClFX3\ce{ClF3} Cl(+3) ClOX2X−\ce{ClO2-} (via HClOX2\ce{HClO2})
BrFX5\ce{BrF5} Br(+5) BrOX3X−\ce{BrO3-} (via HBrOX3\ce{HBrO3})

This is option (A).