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Chemistry

Chemistry
The main constituent of natural gas is

Methane
Propane
Ethane
Butane

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Chemistry
The presence of ozone in the stratosphere is responsible for

Supplying oxygen for people travelling in jets
Higher rate of photosynthesis
Increasing the average global temperature in recent years
Checking the penetration of ultra-violet rays to the earth

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Chemistry
Conduction band electrons have more mobility than holes because they

Experience collision less frequently
Have negative charge
Are lighter
Need less energy to move them

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Chemistry
In drinking water supply, which of the following treatments is not involved

Sedimentation
Softening
Coagulation
Disinfection

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Chemistry
Which one of the following vegetable oils is used in the manufacture of paints?

Palm oil
Linseed oil
Cottonseed oil
Sunflower oil

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Chemistry
Silicon is a

Insulator
Conductor
Semiconductor
Nonconductor

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MORE MCQ ON Chemistry

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