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JEE Main · 2021 · 16 Mar 2021 · Shift 2 · Hydrogen

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The correct statement about are:
(A) Used in the treatment of effluents.
(B) Used as both oxidizing and reducing agents
(C) The two hydroxyl groups lie in the same plane.
(D) Miscible with water.

Choose the correct answer from the options given below:
  1. (A)(B), (C) and (D) only
  2. (B)(A), (C) and (D) only
  3. (C)(A), (B) and (D) only✓ Correct
  4. (D)(A), (B), (C) and (D)

Answer: (C)

Solution

Hydrogen peroxide oxidises cyanide and organic matter in waste water and leaves only water behind, which is why it is used to treat effluents. Its oxygen sits in the intermediate state, so it can be pushed up to or pulled down to water, and it serves as both an oxidising and a reducing agent. It is miscible with water in all proportions through hydrogen bonding. Its shape, though, is an open book: the two bonds lie in planes meeting at a dihedral angle of about 111 degrees in the gas phase, so the two hydroxyl groups are not coplanar. The true statements are its use on effluents, its dual oxidising and reducing behaviour and its miscibility with water.

JEE Main · 2021 · 16 Mar 2021 · Shift 2 · Single correct option

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