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Chemistry

Chemistry
Silicon is used in

Semiconductors
Transistors
All of these
Solar energy devices

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Chemistry
Where does the oxygen that keeps us alive come from?

Water
Carbonates absorbed from soil
Carbon dioxide
Oxides of minerals

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Chemistry
In an oxygen molecule, two atoms are united by

Three bonds
Two bonds
Four bonds
One bond

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Chemistry
Which of the following laser types is used in a laser printer?

Excimer laser
Semiconductor laser
Gas laser
Dye laser

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Chemistry
The most extensive, commercially useful source of thorium as monazite sand occurs in India at

West Bengal coast
Travancore coast
Gujarat coast
Orissa coast

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Chemistry
Which among the following is liquid non-metal ?

Alcohol
Mercury
Bromine
Water

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MORE MCQ ON Chemistry

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