Which one of the following is considered as a compound?

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General Awareness

Which one of the following is considered as a compound?

This question was previously asked in

CDS 2 2025 Maths Question Paper (14-Sep-2025)

Silicon

Tin

Sugar solution

Calcium carbonate

The correct answer is

Calcium carbonate

Explanation: **Calcium carbonate (CaCO₃)** is a **compound** made of calcium, carbon, and oxygen atoms chemically combined.

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Important Questions from Mixtures and Compounds

Consider the following statements :
I. A colloid and a suspension are heterogeneous mixtures.
II. Colloids can be separated from the mixture by the process of centrifugation.
III. Particles of colloids and suspensions can be seen by naked eye.
IV. The aqueous solution of copper sulphate does not show Tyndall effect; however, the mixture of milk and water shows Tyndall effect.
Which of the statements given above is/are correct?
NDA - 2026
General Awareness
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1)

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

List I (Word/Expression/Specialised term)	List II (Meaning)
A. Incensed	1. Designed to cause fires
B. Incendiary	2. Unmindful of potential risks
C. Incautious	3. Giving out light when heated
D. Incandescent	4. Enraged

Code :
A B C D

2)

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

List I (Word/Expression/Specialised term)	List II (Meaning)
A. Bequeath	1. To pledge property as a security
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C. Endowment	3. Agreement for use of property against rent
D. Lease	4. To grant funds for running a socially-beneficial institution

Code :
A B C D

3)

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

List I (Word/Expression/Specialised term)	List II (Meaning)
A. Ascribe	1. Associate ownership or authorship with
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C. Proscribe	3. Lay down a rule
D. Inscribe	4. Officially forbid

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A B C D

4)

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

List I (Word/Expression/Specialised term)	List II (Meaning)
A. Implication	1. The act of communicating with / praying to a deity
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Code :
A B C D

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

List I (Word/Expression/Specialised term)	List II (Meaning)
A. Blizzard	1. Tropical cyclones over the western Pacific Ocean
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A B C D

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Either my brothers / or my friend / are coming to receive me at the airport. / No error.
(a) (b) (c) (d)

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

List I (Word/Expression/Specialised term)	List II (Meaning)
A. Pragmatist	1. Using too many words
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C. Promontory	3. A headland that juts into a large water body
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Code :
A B C D

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

List I (Word/Expression/Specialised term)	List II (Meaning)
A. Epitaph	1. Words written about a dead person
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9)

The passage draws attention to which one among the following ?

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The "biophilia hypothesis" :

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