chemical reactions-oxidation,reduction,corrosion,rancidity

chemical reactions-oxidation,reduction,corrosion,rancidity

25 Qs

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chemical reactions-oxidation,reduction,corrosion,rancidity

chemical reactions-oxidation,reduction,corrosion,rancidity

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karthik SK

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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • Ungraded

Oxidation involves:
A)Gain of hydrogen
B) Loss of oxygen
C) Loss of hydrogen
D) Loss of electrons

2.

MULTIPLE CHOICE QUESTION

1 min • Ungraded

In a redox reaction, the substance that gets reduced:
A)Loses electrons
B) Gains electrons
C) Loses oxygen
D) Gains hydrogen

3.

MULTIPLE CHOICE QUESTION

1 min • Ungraded

Which of the following is an example of oxidation?
A)Cl₂ → 2Cl⁻
B) Fe²⁺ → Fe³⁺
C) Cu²⁺ → Cu
D) H₂ → 2H⁺

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which statement is correct for a redox reaction?
A)Both oxidation and reduction occur separately
B) Only oxidation occurs
C) Oxidation and reduction occur simultaneously
D) Only reduction occurs

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In the reaction: Zn + CuSO₄ → ZnSO₄ + Cu, the reducing agent is:
A)Zn
B) Cu
C) Cu²⁺
D) SO₄²⁻

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What happens to the oxidation number of a substance when it is oxidized?
A)Decreases
B) Increases
C) Remains same
D) Doubles

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which reaction shows reduction?
A)Fe → Fe²⁺
B) Cu → Cu²⁺
C) O₂ → 2O²⁻
D) H₂O → H₂

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