NEET
- Exam
- NEET
- Subject
- Chemistry
- Chapter
- Redox Reactions
NEET · Chemistry · Redox Reactions
In the reaction given below: (A) (H _ 2 S_ (a) +Cl_ 2(a) 2 HCl_ (a)...
In the reaction given below:
(A) (\mathrm{H}}_{2} \mathrm{ S}_{(a)}+\mathrm{Cl}_{2(a)} \longrightarrow2 \mathrm{HCl}_{(a)}+\mathrm{S}_{(a)})
(B) (3 \mathrm{Fe}}_{3} \mathrm{O}_{4(5)}+8 9 4 \mathrm{Al}}_{2} \mathrm{O}_{3(6)})
The related statements are:
Statement-I : In (A) (\mathrm{H}}_{2} ) is oxidised because a more electronegative element (\mathrm{Cl}}_{2}) is added to hydrogen.
Statement-II : In (B) Aluminium is oxidised because oxygen is added to it.
Statement-III : In (B) Ferrous ferric oxide is reduced.
Statement-IV : Individual oxidation or reduction reactions never possible but redox reactions occurs.
The correct one is :
Options
- AStatement-I, II, III and IV are correct
- BStatement-I, II are correct but III and IV are incorrect
- CStatement-I, II, III and IV are incorrect
- DStatement-II, IV are incorrect but I and III are correct
Correct answer
D. Statement-II, IV are incorrect but I and III are correct
Step-by-step solution
- Statement I: Incorrect. (\mathrm{H}_2 \mathrm{~S}) is oxidized, but not because (\mathrm{Cl}_2) is more electronegative. It's due to sulfur's oxidation state change.
- Statement II: Incorrect. Aluminium is oxidized, but the reasoning is wrong. It's oxidized because it loses electrons, not just due to oxygen addition.
- Statement III: Correct. (\mathrm{Fe}_3 \mathrm{O}_4) (ferrous ferric oxide) is reduced to Fe.
- Statement IV: Correct. Redox reactions involve both oxidation and reduction together. Individual redox reactions don't happen in isolation.