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Chemistry

Chemistry
Antacids are found in drugs that give relief to

Headache
Acne
Eye sight
Stomach ache

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Chemistry
Cement is usually a mixture of :

Calcium silicate and calcium aluminate
Lime stone and silicon dioxide
Calcium aluminate and calcium ferrate
Calcium silicate and calcium ferrate

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Chemistry
Iron is prevented from rusting by coating with zinc. This process is called as

Galvanisation
Reduction
Sublimation
Corrosion

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Chemistry
Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ?

Sulphur dioxide
Chlorofluorocarbon
Nitrous oxide
Carbon dioxide

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Chemistry
Percentage of lead in lead pencils is

40
80
31-66

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Chemistry
In silvery paints, the main constituent present is

White lead
Silver powder
Lead powder
Aluminium powder

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