NDA General Ability 13 April 2025 | Chemistry Question 146 | General Science

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NDA General Ability 13 April 2025

MCQ (Single Correct Answer)

-1.33

Which one of the following statements about a compound is NOT correct?

A compound is a substance composed of two or more elements, chemically combined in a fixed proportion

Properties of a compound are different from its constituent elements

A compound is an impure substance

The constituents of a compound can be separated only by chemical or electrochemical reactions

NDA General Ability 13 April 2025

MCQ (Single Correct Answer)

-1.33

Match List I with List II and select the answer using the code given below the Lists:

Code:

(a) - (4) , (b) - (2) , (c) - (1) , (d) - (3)

(a) - (4) , (b) - (1) , (c) - (2) , (d) - (3)

(a) - (3) , (b) - (1) , (c) - (2) , (d) - (4)

(a) - (3) , (b) - (2) , (c) - (1) , (d) - (4)

NDA General Ability 13 April 2025

MCQ (Single Correct Answer)

-1.33

Which one of the following nitrogen oxides may dimerize?

N₂O

NO₂

N₂O₃

N₂O₅

NDA General Ability 13 April 2025

MCQ (Single Correct Answer)

-1.33

Which one of the following statements regarding oxidation and reduction reactions is NOT correct?

If a substance loses hydrogen during reaction, it is reduced

If a substance loses oxygen during reaction, it is reduced

If a substance gains hydrogen during reaction, it is reduced

If a substance gains oxygen during reaction, it is oxidized

Questions Asked from Marks 4