Who discovered the presence of the cosmic entity known as the black hole through mathematical solutions to General Relativity equations? MCQ with Answer and Explanation

Question

Who discovered the presence of the cosmic entity known as the black hole through mathematical solutions to General Relativity equations?

A. Karl Schwarzschild

B. Albert Einstein

C. Stephen Hawking

D. Subrahmanyan Chandrasekhar

Answer: Option A

Solution (By JKSSB Mock Tests)

Karl Schwarzschild derived the exact solution for spherical non-rotating point mass objects in 1915, outlining the event horizon radius.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who invented the high-pressure industrial chemical synthesis of ammonia from raw nitrogen and hydrogen gases?

A. Fritz Haber and Carl Bosch

B. Antoine Lavoisier

C. Dmitri Mendeleev

D. Wilhelm Ostwald

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Correct Answer: Option A

Explanation:
The Haber-Bosch process synthesized ammonia efficiently on an industrial scale, revolutionizing agricultural fertilizers.

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Question #2

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Who formulated the Laws of Planetary Motion?

A. Johannes Kepler

B. Galileo Galilei

C. Isaac Newton

D. Nicolaus Copernicus

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Correct Answer: Option A

Explanation:
Johannes Kepler formulated the three laws of planetary motion in the early 17th century.

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Question #3

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Who invented the first mass-produced synthetic plastic material, Bakelite, in 1907?

A. Leo Baekeland

B. Wallace Carothers

C. Alexander Parkes

D. John Wesley Hyatt

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Correct Answer: Option A

Explanation:
Belgian-American chemist Leo Baekeland invented Bakelite, the first fully synthetic plastic valued for its electrical non-conductivity.

This question belongs to: Static General Knowledge Inventions and Discoveries

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