Who discovered that atomic radioactive decay emits discrete high-energy electromagnetic waves named 'Gamma Rays'? MCQ with Answer and Explanation

Question
Who discovered that atomic radioactive decay emits discrete high-energy electromagnetic waves named 'Gamma Rays'?
A. Ernest Rutherford
B. Henri Becquerel
C. Paul Villard
D. Marie Curie
Answer: Option C
Solution (By JKSSB Mock Tests)
French chemist Paul Villard discovered gamma radiation in 1900 while studying uranium emission shielding paths.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the first practical household mechanical washing machine is attributed to which developer?
A. Walter Hunt
B. Elisha Otis
C. Alva J. Fisher
D. Thomas Edison
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Correct Answer: Option C

Explanation:
Alva J. Fisher is credited with inventing the electric-motor-driven 'Thor' washing machine, introduced by the Hurley Machine Company in 1908.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered the antibiotic Streptomycin, the first effective cure for tuberculosis, winning a Nobel Prize in 1952?
A. Alexander Fleming
B. Selman Waksman
C. Howard Florey
D. Edward Abraham
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Correct Answer: Option B

Explanation:
Selman Waksman discovered several antibiotics produced by soil microbes, including streptomycin.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who discovered that certain types of mold produce enzymes that slice viral genetic strains, known as CRISPR-Cas9 genome editing?
A. Emmanuelle Charpentier and Jennifer Doudna
B. James Watson
C. Kary Mullis
D. Alec Jeffreys
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Correct Answer: Option A

Explanation:
Charpentier and Doudna adapted the bacterial immune mechanism into an exceptionally precise genetic engineering tool, winning the 2020 Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
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