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Chemistry

Chemistry
The heaviest naturally occurring element is:

Thorium
Polonium
Mercury
Uranium

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Chemistry
By-product obtained by soap industry is

Naphthalene
Glycerol
Caustic potash
Caustic soda

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Chemistry
Which one of the following chemicals helps in fruit ripening?

Ethephon
Atrazine
Malathion
Isoproturan

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Chemistry
Which of the following laser types is used in a laser printer?

Dye laser
Gas laser
Excimer laser
Semiconductor laser

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Chemistry
Silicon is a

Insulator
Semiconductor
Conductor
Nonconductor

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Chemistry
The gas produced in marshy places due to decomposition of vegetation is

Carbon monoxide
Sulphur dioxide
Methane
Carbon dioxide

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MORE MCQ ON Chemistry

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