Which of the following statements regarding oxidation and reduction are correct? 1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place. 2. In oxidation, gain of electron takes place whereas in reduction, loss of

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Q: 19 (NDA-I/2012)

Which of the following statements regarding oxidation and reduction are correct?
1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place.
2. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place.
3. Oxidizing agent decreases the oxidation number but reducing agent increases the oxidation number.
4. Oxidizing agent increases the oxidation number but reducing agent reduces the oxidation number.
Select the correct answer using the code given below ; Code:

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,13,25,9,11,5,13

keywords: 

{'oxidation number': [0, 0, 1, 2], 'oxidation': [0, 0, 1, 0], 'reduction': [2, 4, 2, 13], 'electron': [0, 0, 0, 2]}

Option 1 states that oxidation involves the loss of electrons, while reduction involves the gain of electrons. This statement is correct.

Option 2 states that oxidation involves the gain of electrons, while reduction involves the loss of electrons. This statement is incorrect. The correct statement is provided in Option 1.

Option 3 states that an oxidizing agent decreases the oxidation number, while a reducing agent increases the oxidation number. This statement is incorrect. The correct statement is that an oxidizing agent increases the oxidation number, while a reducing agent decreases the oxidation number.

Option 4 states that an oxidizing agent increases the oxidation number, while a reducing agent reduces the oxidation number. This statement is correct.

Therefore, the correct statements regarding oxidation and reduction are:

1. In oxidation, loss of electrons takes place, whereas in reduction, gain of electrons takes place.

4. An oxidizing agent increases the oxidation number, while a reducing agent reduces the oxidation number.

The correct answer is Option 4.