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Chemistry

Chemistry
When formaldehyde and potassium hydroxide are heated, we get

Ethyl formate
Methyl alcohol
Methane
Acetylene

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Chemistry
The most abundant rare gas in the atmosphere is

Xe
Ne
He
Ar

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Chemistry
'Vinegar' is a commercial name of

Acetic acid
Hydrochloric acid
Citric acid
Oxalic acid

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Chemistry
Heavy metals got their name because compared to other atoms they have

Higher densities
Higher atomic masses
Higher atomic numbers
Higher atomic radii

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Chemistry
Which of the following is not a method of preparing oxygen?

Decomposition of manganese dioxide
Decomposition of potassium permanganate
Fractional distillation of liquid air
Electrolysis of water

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Chemistry
The graphite rods in the nuclear reactor

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

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