CNG stands for: MCQ with Answer and Explanation

CNG stands for:
A. Carbon Natural Gas
B. Clean Natural Gas
C. Compressed Natural Gas
D. Condensed Natural Gas
Answer: Option C
Solution (By JKSSB Mock Tests)
CNG stands for Compressed Natural Gas. It is primarily methane stored at high pressure. It is considered a cleaner fuel than petrol or diesel because it produces fewer pollutants like carbon monoxide and unburnt hydrocarbons, and it leaves no residue upon combustion.

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Practice More chemistry Questions

Question #1
According to Graham's law, the rate of diffusion of a gas is inversely proportional to the square root of its:
A. Temperature
B. Density (or molar mass)
C. Pressure
D. Volume

Correct Answer: Option B


Explanation:
Graham's law: r ∝ 1/√M (molar mass). At same T,P, rate inversely proportional to square root of density. Lighter gases diffuse faster. Used in uranium enrichment (UF₆).

This question belongs to: Science chemistry
Question #2
Identify the correct statement regarding the physical properties of matter.
A. Liquids have a definite volume but no definite shape.
B. Gases cannot be compressed.
C. Solids have the maximum intermolecular space.
D. Gases have the highest density among the three states.

Correct Answer: Option A


Explanation:
Liquids have a definite volume but take the shape of their container. Solids have the least intermolecular space and highest density. Gases have maximum intermolecular space and are highly compressible. This relates directly to the kinetic theory of matter, which describes particle arrangement and movement in different states.

This question belongs to: Science chemistry
Question #3
The major component of petroleum gas (associated gas) is:
A. Methane
B. Butane
C. Propane
D. Hydrogen

Correct Answer: Option A


Explanation:
Petroleum gas, also known as natural gas associated with oil deposits, is primarily methane (CH₄) with smaller amounts of ethane, propane, and butane. LPG is propane and butane. Methane is the lightest hydrocarbon. It is separated and used as fuel (CNG) or petrochemical feedstock.

This question belongs to: Science chemistry