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

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

A. Michael Faraday

B. Jöns Jacob Berzelius

C. Humphry Davy

D. Antoine Lavoisier

Answer: Option C

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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Question #1 Report Error

The invention of the common mechanical device known as the modern coin-operated parking meter was patented by whom?

A. Carl Magee

B. James Ritty

C. Garrett Morgan

D. Walter Hunt

Correct Answer: Option A

Explanation:
Carl Magee patented the 'Park-O-Meter' in Oklahoma City in 1935 to regulate downtown vehicle traffic turnover.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2 Report Error

The invention of the safety razor with disposable stamped steel blades was introduced by whom?

A. King Camp Gillette

B. John Loud

C. Walter Hunt

D. Elisha Otis

Correct Answer: Option A

Explanation:
King Camp Gillette patented the safety razor system with cheap, replaceable double-edged blades in 1904.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3 Report Error

The discovery of the Raman Effect, which won the Nobel Prize in Physics in 1930, was made by whom?

A. C.V. Raman

B. Satyendra Nath Bose

C. Homi J. Bhabha

D. Jagadish Chandra Bose

Correct Answer: Option A

Explanation:
Sir Chandrasekhara Venkata Raman discovered the inelastic scattering of light, known as the Raman Effect, on February 28, 1928.

This question belongs to: Static General Knowledge Inventions and Discoveries