Who discovered that stable elements possess unique integer identifiers based on X-ray emission frequencies, restructuring atomic numbers? MCQ with Answer and Explanation

Question
Who discovered that stable elements possess unique integer identifiers based on X-ray emission frequencies, restructuring atomic numbers?
A. Ernest Rutherford
B. Henry Moseley
C. Dmitri Mendeleev
D. J.J. Thomson
Answer: Option B
Solution (By JKSSB Mock Tests)
Moseley proved that ordering chemical elements by nuclear charge (atomic number) resolved inconsistencies in Mendeleev's mass-ordered layout.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who invented the first practical electronic calculator utilizing a microprocessor chip?
A. Busicom team and Intel (Masatoshi Shima, Ted Hoff)
B. John von Neumann
C. Charles Babbage
D. Alan Turing
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Correct Answer: Option A

Explanation:
The partnership between Busicom and Intel led to the invention of the Intel 4004, the first commercial programmable microprocessor.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who invented the first practical alternating current (AC) motor and power transmission system?
A. Nikola Tesla
B. George Westinghouse
C. Michael Faraday
D. Thomas Edison
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Correct Answer: Option A

Explanation:
Nikola Tesla patented the AC induction motor and polyphase system, which revolutionized long-distance electrical grid power distribution.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the mass spectrometer, used to separate isotopes and determine chemical composition, was developed by whom?
A. Ernest Rutherford
B. Francis William Aston
C. J.J. Thomson
D. James Chadwick
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Correct Answer: Option B

Explanation:
Francis William Aston built the first fully functional mass spectrograph in 1919 and discovered isotopes in non-radioactive elements.
This question belongs to: Static General Knowledge Inventions and Discoveries
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