Who discovered the radioactive elements Radium and Polonium? MCQ with Answer and Explanation

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Who discovered the radioactive elements Radium and Polonium?

A. Marie and Pierre Curie

B. Ernest Rutherford

C. Otto Hahn

D. Henri Becquerel

Answer: Option A

Solution (By JKSSB Mock Tests)

Marie Skłodowska-Curie and her husband Pierre isolated polonium and radium from pitchblende ore in 1898.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that the planet Saturn possesses a wide gap inside its ring bands, known as the Cassini Division?

A. Galileo Galilei

B. Giovanni Domenico Cassini

C. Christiaan Huygens

D. William Herschel

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Correct Answer: Option B

Explanation:
Cassini discovered the distinct gap separating Saturn's A and B rings in 1675 from the Paris Observatory.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered that atomic structural properties are governed by specific continuous wave function coordinates, formulating Wave Mechanics?

A. Niels Bohr

B. Erwin Schrödinger

C. Max Born

D. Werner Heisenberg

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Correct Answer: Option B

Explanation:
Erwin Schrödinger formulated the Schrödinger Equation in 1925, introducing wave function dynamics to quantum models.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

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Who invented the first practical modern typewriter with a QWERTY keyboard layout?

A. Thomas Edison

B. Pellegrino Turri

C. William Austin Burt

D. Christopher Latham Sholes

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Correct Answer: Option D

Explanation:
Christopher Latham Sholes invented the first commercially practical mechanical typewriter and developed the QWERTY keyboard layout to prevent jamming.

This question belongs to: Static General Knowledge Inventions and Discoveries

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