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Chemistry

Chemistry
Plastic is a type of

Acrylic
Polyester
Polymer
None of these

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Chemistry
Which of the following is a commercial source of energy?

Dried dung
Natural gas
Agricultural waste
Sun

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Chemistry
High concentration hydrocarbon pollutants in atmospheric air causes

Reduced crop yield
Respiratory diseases (e.g.asthma)
Silicosis
Cancer

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Chemistry
The most electronegative element among the following is

fluorine
oxygen
sodium
bromine

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Chemistry
The advantage of detergents over soaps is

Detergents could not give much lather
Detergents are soluble in water
Detergents give lather even with hard water
Soaps give lather with only soft water

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Chemistry
The molecular mass of a gas is

Twice its vapour pressure
Not related to its vapour pressure
Half its vapour pressure
Equal to its vapour pressure

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