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1
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following statements regarding oxidation and reduction reactions is NOT correct?
1
If a substance loses hydrogen during reaction, it is reduced
2
If a substance loses oxygen during reaction, it is reduced
3
If a substance gains hydrogen during reaction, it is reduced
4
If a substance gains oxygen during reaction, it is oxidized
2
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
For acid rain, the pH of rain water should be less than
1
7·0
2
6·6
3
5·6
4
8·0
3
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
What happens when the fat and oil containing food materials are left outside for a long time?
1
Fats and oils in the food get oxidized
2
Fats and oils in the food get reduced
3
Fats and oils in the food get ice-covered
4
No reaction takes place
4
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one among the following elements is known to be discovered the earliest?
1
Copper
2
Gold
3
Oxygen
4
Uranium
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