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Chemistry

Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Magnesium
Silicon
Iron
Oxygen

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Chemistry
Quartz is made of

Calcium Silicate
Sodium Sulphate
Sodium Silicate
Calcium Sulphate

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Chemistry
The process of removing calcium and magnesium from hard water is known as

Flocculation
Filtration
Water softening
Sedimentation

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Chemistry
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is

CO2
CO
O3
All of these

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Chemistry
Silicon is used in

All of these
Solar energy devices
Semiconductors
Transistors

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

Natural gas
Geothermal powder
Coal
Uranium

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MORE MCQ ON Chemistry

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