The first practical steam-powered water pump, known as the 'Miner's Friend', was invented by whom in 1698? MCQ with Answer and Explanation

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The first practical steam-powered water pump, known as the 'Miner's Friend', was invented by whom in 1698?

A. Thomas Newcomen

B. James Watt

C. Thomas Savery

D. Richard Trevithick

Answer: Option C

Solution (By JKExamLibrary)

Thomas Savery patented the first commercial steam-driven machine to pump water out of flooded mines.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that plant respiration consumes oxygen and releases carbon dioxide in the dark, complementing early photosynthesis concepts?

A. Joseph Priestley

B. Jan Ingenhousz

C. Antoine Lavoisier

D. Jean Senebier

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Correct Answer: Option B

Explanation:
Ingenhousz discovered that light exposure is necessary for plants to emit oxygen, whereas they release carbon dioxide in unlit conditions.

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Question #2

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

A. Alexander Parkes

B. Leo Baekeland

C. Wallace Carothers

D. John Wesley Hyatt

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Correct Answer: Option B

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