Who invented the first practical electronic calculator utilizing a microprocessor chip? MCQ with Answer and Explanation

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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. Alan Turing

D. Charles Babbage

Answer: Option A

Solution (By JKSSB Mock Tests)

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

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Who invented the first functional polymer-based synthetic rubber, Neoprene?

A. Wallace Carothers

B. Roy Plunkett

C. Charles Goodyear

D. Leo Baekeland

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Correct Answer: Option A

Explanation:
Wallace Carothers' research group at DuPont synthesized chloroprene polymer, marketing it as Neoprene in 1931.

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Question #2

The structure of benzene ring ($C_6H_6$) was discovered by which chemist?

A. Robert Boyle

B. Antoine Lavoisier

C. Dmitri Mendeleev

D. Friedrich August Kekulé

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Correct Answer: Option D

Explanation:
Friedrich August Kekulé discovered the ring structure of benzene after famously having a daydream of a snake biting its own tail.

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Question #3

Who discovered that the velocity of light transitions through changing gravitational coordinates, establishing the gravitational redshift?

A. Albert Einstein

B. Arthur Eddington

C. Edwin Hubble

D. Isaac Newton

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Correct Answer: Option A

Explanation:
Einstein's General Theory of Relativity predicted that photons lose energy and shift toward lower frequencies when climbing out of a gravitational well.

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