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Chemistry

Chemistry
The fiber least prone to catch fire is

Polyester
Nylon
Terylene
Cotton

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Chemistry
Cement is made hard with

Dissociation of water
Polymerisation
Hydration and dissociation of water
Dehydration

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Chemistry
The two metal ions that cause hardness to water are:

Sodium, Calcium
Sodium, Magnesium
Calcium, Magnesium
Sodium, Potassium

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Chemistry
Zinc sulphide is commonly used as

Deodorant
Rodenticide
Fungicide
Herbicide

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Chemistry
The Bhopal tragedy was caused by the gas

Phosgene
Chlorine
Methyl isocyanate
Carbon monoxide

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

Lime
Potassium Permangante
Sodium carbonate
Alum

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MORE MCQ ON Chemistry

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