NEET 2024 — Chemistry solution

NEET2024Chemistry

Which reaction is NOT a redox reaction?

A
H $_{2}$ + Cl $_{2} \to$ 2HCl
B
BaCl $_{2}$ + Na $_{2}$ SO $_{4} \to$ BaSO $_{4}$ + 2NaCl
C
Zn + CuSO $_{4} \to$ ZnSO $_{4}$ + Cu
D
2KClO $_{3}$ + I $_{2} \to$ 2KIO $_{3}$ + Cl $_{2}$

Solution

Check oxidation states in option 2: Ba(+2), Cl(-1), Na(+1), S(+6), O(-2). None change between reactants and products $\Rightarrow$ it is a double-displacement, not a redox.

The other three involve clear electron transfer.

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