Which gas is used in balloons? MCQ with Answer and Explanation

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Which gas is used in balloons?

A. Carbon dioxide

B. Oxygen

C. Nitrogen

D. Helium

Answer: Option D

Solution (By JKSSB Mock Tests)

Helium is lighter than air and non-flammable, making it safe for balloons.

This question belongs to: Static General Knowledge Science and Technology

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Question #1

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What is the purpose of a firewall in network security?

A. To enhance graphic display

B. To speed up internet connection

C. To store backup files

D. To block unauthorized access to a network

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Correct Answer: Option D

Explanation:
A firewall monitors and controls incoming and outgoing network traffic based on security rules.

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Question #2

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CRISPR is derived from:

A. Human genome

B. Plant genetics

C. Animal cloning

D. Bacterial immune system

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Correct Answer: Option D

Explanation:
It is an adaptive immune system in bacteria.

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Question #3

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What is the SI unit of force?

A. Newton

B. Joule

C. Watt

D. Pascal

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Correct Answer: Option A

Explanation:
The Newton (N) is the SI unit of force.

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