Who discovered the planet Neptune using mathematical calculations before it was verified by telescope? MCQ with Answer and Explanation

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Who discovered the planet Neptune using mathematical calculations before it was verified by telescope?

A. Galileo Galilei

B. William Herschel

C. Urbain Le Verrier and John Couch Adams

D. Johannes Kepler

Answer: Option C

Solution (By JKSSB Mock Tests)

Urbain Le Verrier and John Couch Adams independently calculated the location of Neptune based on irregularities in Uranus's orbit.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that the chemical element Calcium is isolated via electrolysis of lime and mercuric oxide mixtures?

A. Antoine Lavoisier

B. Jöns Jacob Berzelius

C. Humphry Davy

D. Joseph Black

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Correct Answer: Option C

Explanation:
Sir Humphry Davy isolated elemental calcium metal in 1808 using a mercury-cell electrolysis setup.

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Question #2

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The invention of the common domestic non-stick cookware surface pan coating was developed using which material?

A. Kevlar

B. Nylon

C. Bakelite

D. PTFE (Teflon) by Marc Grégoire

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Correct Answer: Option D

Explanation:
French engineer Marc Grégoire developed the process to bond Teflon to aluminum pan matrices, founding the Tefal brand.

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Question #3

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The invention of the highly reflective silver glass surface mirror layout was developed by which chemist?

A. Antoine Lavoisier

B. Robert Bunsen

C. Carl Wilhelm Scheele

D. Justus von Liebig

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Correct Answer: Option D

Explanation:
Liebig developed the chemical process of depositing thin metallic silver onto glass panes using chemical reduction reactions in 1835.

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