NDA General Ability 13 April 2025 | Chemistry Question 150 | General Science

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NDA General Ability 13 April 2025

MCQ (Single Correct Answer)

-1.33

For acid rain, the pH of rain water should be less than

7·0

6·6

5·6

8·0

NDA General Ability 13 April 2025

MCQ (Single Correct Answer)

-1.33

What happens when the fat and oil containing food materials are left outside for a long time?

Fats and oils in the food get oxidized

Fats and oils in the food get reduced

Fats and oils in the food get ice-covered

No reaction takes place

NDA General Ability 13 April 2025

MCQ (Single Correct Answer)

-1.33

Which one among the following elements is known to be discovered the earliest?

Copper

Gold

Oxygen

Uranium

NDA General Ability 21 April 2024

MCQ (Single Correct Answer)

-1.33

The relative atomic mass of boron (which exists in two isotopic forms ¹⁰B and ¹¹B) is 10.81. What will be the abundance of ¹⁰B and ¹¹B, respectively (consider a sample of 100 atoms)?

19% and 81%

81% and 19%

38% and 62%

62% and 38%

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