Who discovered that the chemical element Iodine is isolated from seaweed ash matrices? MCQ with Answer and Explanation

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

A. Antoine Lavoisier

B. Joseph Louis Gay-Lussac

C. Bernard Courtois

D. Humphry Davy

Answer: Option C

Solution (By JKSSB Mock Tests)

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

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Who discovered that blood can be categorized into various Rh factors (positive and negative)?

A. Karl Landsteiner and Alexander Wiener

B. William Harvey

C. Robert Koch

D. Edward Jenner

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Correct Answer: Option A

Explanation:
Karl Landsteiner and Alexander S. Wiener discovered the Rhesus (Rh) factor in blood in 1937.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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The invention of the widely used computer programming language C was developed by whom at Bell Labs in 1972?

A. Guido van Rossum

B. James Gosling

C. Bjarne Stroustrup

D. Dennis Ritchie

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Correct Answer: Option D

Explanation:
Dennis Ritchie created the C language to rewrite the Unix operating system, laying foundations for modern system software.

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Question #3

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Who discovered that the planet Saturn has a prominent ring system and its largest moon, Titan?

A. Galileo Galilei

B. Christiaan Huygens

C. Giovanni Cassini

D. William Herschel

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Correct Answer: Option B

Explanation:
Christiaan Huygens correctly identified Saturn's rings in 1655 and discovered its largest moon, Titan.

This question belongs to: Static General Knowledge Inventions and Discoveries

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