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Chemistry

Chemistry
Vinegar made by fermentation from cane sugar contains

Lactic acid
Palmitic acid
Citric acid
Acetic acid

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Chemistry
The metal that is usually extracted from sea water is

K
Mg
Na
Ca

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Chemistry
Permanent – hardness of water may be removed by addition of

Lime
Potassium Permangante
Alum
Sodium carbonate

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Chemistry
In its reaction with silver nitrate, C2H2 shows

Basic property
Reducing property
Acidic property
Oxidising property

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Chemistry
The mass number of an atom is equal to

the number of protons and electrons
the number of protons
the number of neutrons
the number of nucleons

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Chemistry
Which variety of coal contains recognisable traces of the original plant material ?

Bitumen
Anthracite
Peat
Lignite

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