JEE Main 2026 — Apr 2, Shift 1 — Chemistry solution

JEE Main2026Apr 2, Shift 1Chemistry

Given below are two statements :

Statement (I) : Oxidising power of halogens decreases in the order $F_{2} > C l_{2} > B r_{2} > I_{2}$ , which is the basis of "Layer test".

Statement (II) : "Layer test" to identify $B r_{2}$ and $I_{2}$ in aqueous solution involves the oxidation of bromide or iodide into $B r_{2}$ or $I_{2}$ respectively with $C l_{2}$ , which is a type of displacement redox reaction.

In the light of the above statements, choose the correct answer from the options given below :

A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true

Solution

The oxidising power of halogens decreases down the group as $F_{2} > C l_{2} > B r_{2} > I_{2}$ , so $C l_{2}$ can oxidise both $B r^{-}$ and $I^{-}$ . Statement I is correct.

The layer test uses this displacement behaviour: $C l_{2}$ water is added to the salt and the liberated halogen is extracted into an organic layer for colour identification:

$2 N a B r + C l_{2} \to 2 N a C l + B r_{2}$ (orange/brown layer)

$2 N a I + C l_{2} \to 2 N a C l + I_{2}$ (violet layer)

Both statements are true.

← Back to full paper

Practice more Chemistry

Concept-wise practice with instant solutions on Fundamenthol.

Start practicing →