The invention of the common military defensive structure known as Barbed Wire was patented in its definitive commercial form by whom? MCQ with Answer and Explanation

Question

The invention of the common military defensive structure known as Barbed Wire was patented in its definitive commercial form by whom?

A. Cyrus McCormick

B. Eli Whitney

C. John Deere

D. Joseph Glidden

Answer: Option D

Solution (By JKSSB Mock Tests)

Joseph Glidden patented the two-wire twisted barb lock mechanism in 1874, changing open-range farming and livestock control.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The invention of the common household aerosol spray can configuration was developed by whom?

A. Leo Baekeland

B. Erik Rotheim

C. Roy Plunkett

D. Wallace Carothers

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Correct Answer: Option B

Explanation:
Norwegian engineer Erik Rotheim patented the first aerosol can layout featuring pressure valves and liquid propellant mixtures in 1926.

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Question #2

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Who discovered that the speed of chemical reactions increases when specific non-consumed agents are added, coining the term 'Catalysis'?

A. Jöns Jacob Berzelius

B. Robert Boyle

C. Wilhelm Ostwald

D. Antoine Lavoisier

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Correct Answer: Option A

Explanation:
Berzelius identified chemical catalytic force in 1835, which Ostwald later formalized thermodynamically.

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Question #3

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Who discovered the element Sodium through the process of electrolysis?

A. Antoine Lavoisier

B. Jöns Jacob Berzelius

C. Humphry Davy

D. Michael Faraday

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Correct Answer: Option C

Explanation:
Sir Humphry Davy isolated sodium, potassium, calcium, and magnesium using electrolysis in the early 1800s.

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