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Chemistry

Chemistry
Nitric acid does not react with

Gold
Iron
Zinc
Copper

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Chemistry
Ultraviolet radiation striking the earth is due to the depletion of

Ozone
Carbon dioxide
Oxygen
Carbon monoxide

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Chemistry
Solder is an alloy of

Copper, lead
Lead, zinc
Tin, lead
Sodium, lead

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Chemistry
Two moles of an ideal gas expand freely into vacuum. The work done by the gas is

4J
Infinity
2J

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Chemistry
Which of the following phenomenon is considered responsible for Global Warming?

Trade winds
Dry farming
Fire in coal mines
Greenhouse effect

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Chemistry
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

100 years
13 days
3 billion years
0.01 minute

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