Chemistry 9 Chapter 7 MCQs Test 4

In Chemistry 9 Chapter 7 MCQs Test 4, there are 13 MCQs. We have prepared 46 multiple-choice questions, which are divided into 4 practice Tests and 4 Test yourself MCQs Tests. All MCQs are prepared from FBISE Book and Past Papers.

Practice
MCQs Test No 4

/13

101

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Class 9 Chemistry
Chapter 7
Practice
MCQs Test No 4

1 / 13

What is the species that gain electrons in a redox reaction?

increases in oxidation number

oxidizing agent

is oxidized

reducing agent

2 / 13

H₂S +Cl₂ → 2HCl + S
Which of the following species gets reduced?

Cl₂

H₂S and Cl₂ both

S

H₂S

3 / 13

What is oxidation number of Ca in CaCl₂ ?

-1

+2

-2

+1

4 / 13

What is the oxidation number of O in O₂ ?

-2

-1

0

+2

5 / 13

2ZnO + C → 2Zn + CO₂
Identify the element which is oxidized.

Zn

C

ZnO

CO₂

6 / 13

What is the reducing agent of this reaction?
2Al(s) + 6H⁺(aq)   →  2Al⁺³ (aq) + 3H₂(g)

Al⁺³

H⁺

Al

H₂

7 / 13

The oxidation state of oxygen in OF₂  is _____.

+2

+1

0

-2

8 / 13

Which substance is reduced in the following reaction?
NaOH + Li → LiOH + Na

Na

O

Li

H

9 / 13

Which species undergoes a loss of electrons?

Fe (s) + Cl₂ (g)   →   Fe⁺² (aq)   +  Cl^- (aq)

Cl₂

Cl^-

Fe

Fe⁺²

10 / 13

Loss of hydrogen atom by an element is called _____.

decomposition

oxidation

hydrogenation

reduction

11 / 13

Oxidizing agents are mostly _____.

alkaline earth metals

non-metals

transition metals

alkali metals

12 / 13

The oxidation state of hydrogen in calcium hydride is _____.

+1

0

+2

-1

13 / 13

Zn → Zn⁺² + 2e^-

Zinc is reduced

Zinc is oxidized

Zinc is displaced

Zinc is decomposed

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We have also made a test yourself MCQs Test No 4 for you so that you can prepare yourself well.

Test Yourself
MCQs Test No 4

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18

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Class 9 Chemistry
Chapter 7
Test Yourself
MCQs Test No 4

1 / 13

What is oxidation number of Ca in CaCl₂ ?

+1

-1

-2

+2

2 / 13

Loss of hydrogen atom by an element is called _____.

decomposition

oxidation

reduction

hydrogenation

3 / 13

What is the oxidation number of O in O₂ ?

+2

-1

0

-2

4 / 13

Zn → Zn⁺² + 2e^-

Zinc is displaced

Zinc is reduced

Zinc is oxidized

Zinc is decomposed

5 / 13

What is the reducing agent of this reaction?
2Al(s) + 6H⁺(aq)   →  2Al⁺³ (aq) + 3H₂(g)

Al

Al⁺³

H⁺

H₂

6 / 13

2ZnO + C → 2Zn + CO₂
Identify the element which is oxidized.

C

ZnO

Zn

CO₂

7 / 13

H₂S +Cl₂ → 2HCl + S
Which of the following species gets reduced?

H₂S

Cl₂

S

H₂S and Cl₂ both

8 / 13

What is the species that gain electrons in a redox reaction?

increases in oxidation number

is oxidized

reducing agent

oxidizing agent

9 / 13

The oxidation state of oxygen in OF₂  is _____.

+2

+1

0

-2

10 / 13

The oxidation state of hydrogen in calcium hydride is _____.

0

+1

+2

-1

11 / 13

Which substance is reduced in the following reaction?
NaOH + Li → LiOH + Na

Li

H

O

Na

12 / 13

Which species undergoes a loss of electrons?

Fe (s) + Cl₂ (g)   →   Fe⁺² (aq)   +  Cl^- (aq)

Fe

Fe⁺²

Cl₂

Cl^-

13 / 13

Oxidizing agents are mostly _____.

transition metals

non-metals

alkali metals

alkaline earth metals

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