Who is credited with the invention of the submarine 'Turtle', used in military action? MCQ with Answer and Explanation

Who is credited with the invention of the submarine 'Turtle', used in military action?

A. Robert Fulton

B. Cornelis Drebbel

C. David Bushnell

D. John Philip Holland

Answer: Option C

David Bushnell invented the Turtle in 1775, the first submarine ever used in combat.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1 Report Error

Who discovered that the chemical element Iodine is isolated from seaweed ash matrices?

A. Bernard Courtois

B. Antoine Lavoisier

C. Humphry Davy

D. Joseph Louis Gay-Lussac

Correct Answer: Option A

Explanation:
Bernard Courtois isolated violet iodine vapors accidentally in 1811 while adding excess sulfuric acid to seaweed extract solutions.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2 Report Error

The discovery of the mechanism of the greenhouse effect in the atmosphere is first attributed to which scientist?

A. John Tyndall

B. Guy Stewart Callendar

C. Svante Arrhenius

D. Joseph Fourier

Correct Answer: Option D

Explanation:
Joseph Fourier recognized in 1824 that Earth's atmosphere acts like an insulator, warming the planet's surface.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3 Report Error

Who discovered the exact value of the charge of an electron through the famous Oil-Drop Experiment?

A. Max Planck

B. Robert Millikan

C. Ernest Rutherford

D. J.J. Thomson

Correct Answer: Option B

Explanation:
Robert A. Millikan measured the elementary electric charge of electrons using balanced oil droplets in 1909.

This question belongs to: Static General Knowledge Inventions and Discoveries