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Chemistry

Chemistry
Vinegar made by fermentation from cane sugar contains

Citric acid
Palmitic acid
Lactic acid
Acetic acid

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Chemistry
The number of neutrons present in an element having mass number 226 and atomic number 88 is :

138
88
314
50

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Chemistry
Freon' used as refrigerants is chemically

Fluorinated aromatic compound
Fluorinated hydrocarbon
Chlorinated hydrocarbon
Chlorofluoro hydrocarbon

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Chemistry
Which one of the following minerals is found in pure form?

Iron
Copper
Manganese
Bauxite

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Nitrogen
Sulphur
Alcohol
Silicon

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Chemistry
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

leaching
levigation
magnetic separation
liquation

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