Who discovered the element Potassium via electrolytic extraction shortly after isolating Sodium? MCQ with Answer and Explanation

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Who discovered the element Potassium via electrolytic extraction shortly after isolating Sodium?

A. Michael Faraday

B. Humphry Davy

C. Jöns Jacob Berzelius

D. Antoine Lavoisier

Answer: Option B

Solution (By JKSSB Mock Tests)

Sir Humphry Davy isolated potassium in 1807 by running current through molten caustic potash ($KOH$).

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who formulated the mathematical equations governing the unified theory of electricity, magnetism, and optics?

A. James Clerk Maxwell

B. Michael Faraday

C. Heinrich Hertz

D. Albert Einstein

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Correct Answer: Option A

Explanation:
James Clerk Maxwell formulated Maxwell's Equations, proving that light is an electromagnetic wave.

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Question #2

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The first practical high-pressure steam engine was constructed by which mechanical pioneer?

A. Richard Trevithick

B. George Stephenson

C. Thomas Newcomen

D. James Watt

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Correct Answer: Option A

Explanation:
Richard Trevithick built high-pressure industrial engines capable of generating high power outputs from lightweight boilers.

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Question #3

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Who discovered that light waves shift in frequency relative to the relative motion between the source and observer?

A. Albert Einstein

B. Christian Doppler

C. Heinrich Hertz

D. Edwin Hubble

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Correct Answer: Option B

Explanation:
Christian Doppler proposed the Doppler Effect in 1842, which applies uniformly to both acoustic sound pitch adjustments and optical stellar shifts.

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