Chemistry 9 Chapter 7 MCQs Test 2

In Chemistry 9 Chapter 7 MCQs Test 2, there are 11 MCQs. We have prepared 21 multiple-choice questions, which are divided into 2 practice Tests and two Test yourself MCQs Tests. All MCQs are prepared from FBISE Book and Past Papers.

Practice
MCQs Test No 2

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Class 9 Chemistry
Chapter 7
Practice
MCQs Test No 2

1 / 11

Gain of electrons and loss of oxygen is called:

Oxidation

Reduction

Neutralization reaction

Redox reaction

2 / 11

What is the reducing agent in the following reaction?
CuO + H₂  →  Cu + H₂O

H₂

H₂O

CuO

Cu

3 / 11

The oxidation number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

+6 and +2

+3 and +6

+2 and +2

+4 and +7

4 / 11

The oxidation state of B in H₃BO₃ is:

+4

+3

+2

+5

5 / 11

The Oxidation number of ‘N’ in HNO₃ is:

+2

+3

+5

+7

6 / 11

The oxidation state of Hydrogen in metal hydride is?

-1

+2

-2

+1

7 / 11

Which of the following is the reaction taking place at anode?

Zn⁺² + 2e^- → Zn

Pb + Cl₂ → PbCl₂

Cr → Cr⁺² + 3e^-

2H₂ + O₂ → 2H₂O

8 / 11

An electrochemical cell in which electrical energy is used to derive a chemical reaction is called:

Voltaic cell D.

Galvanic cell

Electrolytic cell

Dry cell

9 / 11

In chrome plating, the compound used as an electrolyte is:

Cr₂O₃

Cr₂(SO₄)₃

Cr₂(SO₄)₃ and some drops of HCl

Only H₂SO₄

10 / 11

In chromium plating, the H₂SO₄ is added to Cr₂(SO₄)₃ in order to:

Make Cr neutral

Increase electrolytic power

Prevent hydrolysis

Increase hydrolysis process

11 / 11

Consider the following reaction:
CuO + H₂  →  Cu + H₂O
In this reaction CuO behaves as:

Electrolyte

Oxidizing agent

Catalyst

Reducing agent

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We have also made a test yourself MCQs Test No 2 for you so that you can prepare yourself well.

Test Yourself
MCQs Test No 2

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Class 9 Chemistry
Chapter 7
Test Yourself
MCQs Test No 2

1 / 11

What is the reducing agent in the following reaction?
CuO + H₂  →  Cu + H₂O

CuO

H₂

Cu

H₂O

2 / 11

An electrochemical cell in which electrical energy is used to derive a chemical reaction is called:

Dry cell

Galvanic cell

Electrolytic cell

Voltaic cell D.

3 / 11

The Oxidation number of ‘N’ in HNO₃ is:

+7

+5

+2

+3

4 / 11

The oxidation number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

+2 and +2

+3 and +6

+4 and +7

+6 and +2

5 / 11

In chrome plating, the compound used as an electrolyte is:

Cr₂(SO₄)₃

Cr₂(SO₄)₃ and some drops of HCl

Cr₂O₃

Only H₂SO₄

6 / 11

Gain of electrons and loss of oxygen is called:

Neutralization reaction

Oxidation

Redox reaction

Reduction

7 / 11

Which of the following is the reaction taking place at anode?

Pb + Cl₂ → PbCl₂

Cr → Cr⁺² + 3e^-

2H₂ + O₂ → 2H₂O

Zn⁺² + 2e^- → Zn

8 / 11

In chromium plating, the H₂SO₄ is added to Cr₂(SO₄)₃ in order to:

Prevent hydrolysis

Make Cr neutral

Increase hydrolysis process

Increase electrolytic power

9 / 11

The oxidation state of B in H₃BO₃ is:

+2

+3

+5

+4

10 / 11

Consider the following reaction:
CuO + H₂  →  Cu + H₂O
In this reaction CuO behaves as:

Electrolyte

Reducing agent

Catalyst

Oxidizing agent

11 / 11

The oxidation state of Hydrogen in metal hydride is?

+1

-2

-1

+2

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