Who discovered the specific virus responsible for causing AIDS (Human Immunodeficiency Virus)? MCQ with Answer and Explanation

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Who discovered the specific virus responsible for causing AIDS (Human Immunodeficiency Virus)?

A. Jonas Salk

B. Luc Montagnier and Robert Gallo

C. David Baltimore

D. Howard Temin

Answer: Option B

Solution (By JKSSB Mock Tests)

Luc Montagnier and Robert Gallo isolated and identified the retrovirus HIV as the causative agent behind AIDS in the 1880s.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the fundamental principle of chemical thermodynamics relating free energy, enthalpy, and entropy?

A. Sadi Carnot

B. Josiah Willard Gibbs

C. James Joule

D. Lord Kelvin

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Correct Answer: Option B

Explanation:
Josiah Willard Gibbs formulated Gibbs Free Energy ($G = H - TS$), establishing mathematical precision within physical chemistry.

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Question #2

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Who invented the acoustic phonograph, capturing audio playback on tin foil cylinders?

A. Alexander Graham Bell

B. Emile Berliner

C. Nikola Tesla

D. Thomas Edison

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Correct Answer: Option D

Explanation:
Thomas Alva Edison invented the phonograph in 1877, capturing acoustic sound waves mechanically via steel needles onto soft foils.

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Question #3

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Who discovered that the Milky Way is just one of many distinct independent galaxy clusters across space?

A. Galileo Galilei

B. William Herschel

C. Johannes Kepler

D. Edwin Hubble

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Correct Answer: Option D

Explanation:
Hubble identified Cepheid variable stars in the Andromeda Nebula, computing its enormous distance outside our own galactic boundaries.

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