Who discovered the laws of planetary motion? MCQ with Answer and Explanation

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Who discovered the laws of planetary motion?

A. Galileo Galilei

B. Nicolaus Copernicus

C. Isaac Newton

D. Johannes Kepler

Answer: Option D

Solution (By JKSSB Mock Tests)

Johannes Kepler derived three laws describing the planetary motion around the Sun.

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Which of the following is a renewable energy technology?

A. Nuclear fission

B. Natural gas turbine

C. Solar photovoltaic

D. Coal gasification

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Correct Answer: Option C

Explanation:
Solar PV converts sunlight directly into electricity.

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Question #2

Bt Brinjal is a GM crop developed in:

A. USA

B. Brazil

C. China

D. India

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Correct Answer: Option D

Explanation:
Bt Brinjal was developed by Indian scientists.

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Question #3

Which of the following is the hardest natural substance on Earth?

A. Diamond

B. Platinum

C. Iron

D. Gold

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Correct Answer: Option A

Explanation:
Diamond is an allotrope of carbon and is the hardest known natural mineral.

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