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Chemistry

Chemistry
The water pollution in river is measured by the dissolved amount of

Chlorine
Ozone
Nitrogen
Oxygen

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Chemistry
Silicon is used in

Semiconductors
All of these
Transistors
Solar energy devices

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Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.201
0.273
0.323
0.158

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Chemistry
One carat of diamond is equal to

100 mg
250 mg
200 mg
150 mg

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Chemistry
The common name of sodium bicarbonate is

Baking soda
Soda ash
Soda lime
Baking powder

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Chemistry
Smoke is formed due to

Solid dispresed in liquid
Gas dispersed in gas
Gas dispresed in solid
Solid dispersed in gas

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