The 'Greenhouse Effect' is primarily caused by which gas? MCQ with Answer and Explanation

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The 'Greenhouse Effect' is primarily caused by which gas?

A. Nitrogen

B. Carbon Dioxide

C. Hydrogen

D. Oxygen

Answer: Option B

Solution (By JKSSB Mock Tests)

Carbon dioxide traps heat in the Earth's atmosphere, acting like the glass in a greenhouse.

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What is the use of 'Li-Fi' technology?

A. Radio waves

B. Sound waves

C. Magnetic fields

D. Data transmission using light

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Correct Answer: Option D

Explanation:
Li-Fi uses visible light for wireless communication.

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Question #2

What is a 'Graphic User Interface' (GUI)?

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Correct Answer: Option C

Explanation:
A GUI allows users to interact with electronic devices through visual icons and menus.

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Question #3

What is 'Encryption' used for?

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Correct Answer: Option C

Explanation:
Encryption encodes data so that only authorized parties can read it.

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