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Chemistry

Chemistry
Which of the following is very reactive and kept in kerosene?

Potassium
Sodium
Iodine
Bromine

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Chemistry
Percentage of lead in lead pencils is

80
40
31-66

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Chemistry
Vinegar is an aqueous solution of

Acetic acid
Hydrochloric acid
Oxalic acid
Citric acid

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Chemistry
Iodine can be separated from a mixture of Iodine and Potassium Chloride by

Sedimentation
Sublimation
Distillation
Filtration

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Chemistry
How many atoms of oxygen are in a glucose molecule

6
4
10
3

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Chemistry
Chemical composition of cement is

Limestone and Gypsum
Limestone and Clay
Clay and Gypsum
Limestone, Clay and Gypsum

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