In the reaction 2H₂S+SO₂ → 3S+2H₂O

(a) H₂S has been oxidized
(b) SO₂ has been oxidized
(c) H₂S is the oxidizing agent
(d) SO₂ is the oxidizing agent





Questions No:2
In the reaction MnO₂ + 4HCl → MnCl₂ + CI₂ + 2H₂O, which species is oxidized?

(a) HCl is oxidized to Cl₂
(b) MnO₂ is oxidized to MnCl₂
(c) HCl is oxidized to H₂O
(d) None of these





Questions No:3
Combination of phosphorus and oxygen is an example of

(a) oxidation
(b) reduction
(c) rancidity
(d) None of these





Questions No:4
Which of the following is a redox reaction?

(a) Evaporation of H₂O
(b) Both oxidation and reduction
(c) H₂SO₄ and NaOH




Questions No:5
(d) In atmosphere O₃ from O₂ by lighting

Which of the following is not an example of redox reaction?

(a) 2PbO + C→ 2Pb+CO₂
(b) Fe₂O₃ + 3CO → 2Fe +3CO₂
(c) 2K+ F₂ → 2KF
(d) AgNO₃ + NaCl → AgCl + NaNO₂





Questions No:6
Match the columns:
Column I

(A) Addition of oxygen
(B) Removal of electropositive element
(C) Removal of hydrogen
(D) Addition of electronegative element
Column-II

(I) Oxidation reaction
(II) Reduction reaction

Codes:A-B-C-D

I-II-II-I
II-I-I-II
I-I-II-II
II-II-I-I





Questions No:7
Match the columns:
Column-I

A)2Mg(s)+O₂(g) → 2MgO(s)
B)2H₂S(g)+O₂ → 2S(s)+2H₂O(l)
C)2FeCl₃(aq)+H₂(g) →2FeCl₂(aq)+2HCl(aq)
D)2HgCl₂(aq)+SnCl₂(aq) → Hg₂Cl₂(s) +SnCl₄(aq)

Column II
(I) removal of hydrogen
(II) addition of oxygen
(Ill) addition of electropositive element
(IV) removal of electronegative element
Codes:A-B-C-D

I-II-III-IV
II-I-IV-III
II-III-I-IV
IV-III-II-I





Questions No:8
Consider the following statement:
(A)2Fe₂Cl₂ (aq) + H₂(g) → 2FeCl₂ (aq) + 2HCl(aq) is a redox reaction.
(B) BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl is not a redox reaction.
Select the correct option:

(a) A is true. B is false
(b) Both A and B are false
(c) A is false B Is true
(d) Both A and B are true





Questions No:9
Reduction is a gain of

(a) electrons
(b) protons
(c) neutrons
(d) oxygen





Questions No:10
Loss of electrons is found in

(a) oxidation
(b) reduction
(c) redox reaction
(d) All of the above





Questions No:11
Oxidation reduction reaction involves

(a) transfer of neutrons
(b) transfer of protons
(c) transfer of electrons
(d) None of the above





Questions No:12
It one half of an equation shows oxidation and remaining hall reflects reduction, then we call them:

(a) half equation
(b) oxidation equation
(c) reduction equation
(d) redox equation





Questions No:13
In the reaction Br₂ + 2I^-1→ 2Br^-1+I₂, the oxidizing agent is

Br₂
I^-1
Br^-1
I₂





Questions No:14
Which of the following is/are TRUE regarding oxidation/reduction reactions?
I. Oxidation Involves the gain of electrons
II. Electrons are transferred from one substance to another
III. The number of electrons lost/gained must be equal

(a) I only
(b) II only
(c) III only
(d) II and Ill.





Questions No:15
Electrons are lost by the

(a) reducing agent as it undergoes oxidation.
(b) reducing agent as it undergoes reduction
(c) oxidizing agent as it undergoes oxidation.
(d) oxidizing agent as it undergoes reduction.