Who discovered that certain types of chemical reactions produce electricity spontaneously, formalizing electrochemical cells? MCQ with Answer and Explanation

Question

Who discovered that certain types of chemical reactions produce electricity spontaneously, formalizing electrochemical cells?

A. Georg Ohm

B. Michael Faraday

C. Humphry Davy

D. Luigi Galvani and Alessandro Volta

Answer: Option D

Solution (By JKSSB Mock Tests)

Galvani observed muscle contractions from static discharges, and Volta channeled this into the continuous current metallic pile.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the common electronic storage method known as the floppy disk was developed by which company?

A. Apple

B. IBM engineering team led by Alan Shugart

C. Xerox

D. Sony

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Correct Answer: Option B

Explanation:
IBM introduced the 8-inch magnetic coated flexible disk system in 1971 to load microcode patches into mainframes.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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The invention of Teflon (PTFE) was an accidental discovery by which chemist in 1938?

A. Wallace Carothers

B. Roy Plunkett

C. Gideon Sundback

D. Leo Baekeland

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Correct Answer: Option B

Explanation:
Roy J. Plunkett accidentally discovered polytetrafluoroethylene (Teflon) while researching alternative chlorofluorocarbon refrigerants.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

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Who discovered Hydrogen gas, which he called 'inflammable air'?

A. Antoine Lavoisier

B. Joseph Priestley

C. John Dalton

D. Henry Cavendish

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Correct Answer: Option D

Explanation:
Henry Cavendish isolated hydrogen gas in 1766 and recognized it as a discrete substance.

This question belongs to: Static General Knowledge Inventions and Discoveries

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