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Chemistry

Chemistry
What is the chemical symbol of mercury

Hg
Mg
None of these
Mr

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Chemistry
The graphite rods in the nuclear reactor

react with U to release energy
undergo combustion which triggers the nuclear fission
convert fast moving neutrons into thermal neutrons
produce neutrons

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Chemistry
When cathode rays strike a target of high atomic weight, they give rise to

? and ? rays
Positive rays
?-rays
X-rays

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Chemistry
Number of neutrons in an atom of hydrogen is

Zero
Three
Two
One

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Chemistry
Chemical name of vinegar is

Acetic acid
Ethanol
Acetone
Formaldehyde

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Chemistry
'Atomic theory' of matter was given by

Avogadro
Dalton
Newton
Pascal

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