The main component of natural gas used for cooking is MCQ with Answer and Explanation

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The main component of natural gas used for cooking is

A. Ethane

B. Butane

C. Methane

D. Propane

Answer: Option C

Solution (By JKSSB Mock Tests)

Methane (CH₄) is primary component. LPG is mainly propane and butane. CNG is compressed methane. This relates to everyday physics and chemistry.

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Question #1

If the momentum of a body is doubled, its kinetic energy becomes

A. Double

B. Four times

C. Half

D. Same

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Correct Answer: Option B

Explanation:
K = p²/(2m), if p'=2p, K'=4p²/(2m)=4K. Quadratic relation.

This question belongs to: Science Physics

Question #2

The number of base SI units is

A. 7

B. 8

C. 6

D. 5

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Correct Answer: Option A

Explanation:
Seven base units: metre, kilogram, second, ampere, kelvin, mole, candela. All other units derived. This is standard definition. Supplementary units radian and steradian now considered dimensionless derived units.

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Question #3

The device used to convert DC to AC is

A. Rectifier

B. Inverter

C. Generator

D. Transformer

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Correct Answer: Option B

Explanation:
Inverter converts DC to AC. Rectifier AC to DC.

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