MCQs on Oxidation Reduction

MCQs on Oxidation Reduction

1. The total of the oxidation number in an element is

1. charge
2. volatility
3. reduction
4. oxidation

Answer: (a)

2. The reduction is a gain of

1. electrons
2. protons
3. neutros
4. oxygen

Answer: (a)

3. Which of the following is not a reducing agent?

1. CO2
2. SO2
3. NO2
4. ClO2

Answer: (a)

4. A number which is assigned to each atom or ion in a compound which explains its degree of oxidation is called

1. oxidation state only
2. oxidation number
3. oxidation degree only
4. oxidation state and number

Answer: (d)

5. The gain of oxygen is known as

1. oxidation
2. reduction
3. halogenation
4. chlorination

Answer: (a)

6. Which of the following undergoes a maximum change in its oxidation number, when a mixture of oxalic acid, potassium chlorate and sulphuric acid is heated?

1. S
2. Cl
3. H
4. C

Answer: (b)

7. The oxidation number for oxygen will always be

1. 2
2. -2
3. 1
4. -1

Answer: (b)

8. The reduction is the decrease in

1. oxidation number
2. charge
3. solubility
4. none of the above

Answer: (a)

9. The reaction in which oxidation and reduction takes place at the same time is called

1. redox reaction
2. oxidation reaction
3. reduction reaction
4. none of the above

Answer: (a)

10. Hydrogen (H₂) is used for making

1. margarine only
2. ammonia only
3. salts
4. margarine and ammonia

Answer: (d)