Atoms-and-Molecules UPSC Questions

Chemistry

Atoms-and-Molecules MCQ Questions


1.
The word ‘atom’ has been derived from the Greek word ‘a-tomio’ which means _____
A.
Non-divisible
B.
Uncuttable
C.
Both a and b
D.
Divisible
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ANSWER :
C. Both a and b
2.
Who was the first to propose the atomic theory of matter on a firm scientific basis?
A.
Albert Einstein
B.
John Dalton
C.
Robert Boyle
D.
James Chadwick
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ANSWER :
B. John Dalton
3.
Like charges repel each other and unlike charges _____ each other.
A.
Attract
B.
Repel
C.
Unbend
D.
Break
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ANSWER :
A. Attract
4.
Which one of the following is synthesized in the human body that dilates blood vessels and increases blood flow?
UPSC - 2024
A.
Nitric oxide
B.
Nitrous oxide
C.
Nitrogen dioxide
D.
Nitrogen Pentoxide
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ANSWER :
A. Nitric oxide
5.
What is the charge of cathode?
A.
Plus
B.
Neutral
C.
Positive
D.
Negative
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ANSWER :
D. Negative
6.
Who showed that if electricity is passed through a solution of an electrolyte, chemical reactions occurred at the electrodes, that resulted in the liberation and deposition of matter at the electrode?
A.
Hans Gieger
B.
Michael Faraday
C.
Ernest Rutherford
D.
J.J.Thomson
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ANSWER :
B. Michael Faraday