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Chemistry

Chemistry
The highest volume of gases in lower atmosphere is comprised of

Nitrogen
Carbon dioxide
Oxygen
Hydrogen

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

4J
2J
Infinity

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Chemistry
Cyanide poisoning causes death in seconds because

It breaks the electron transport chain
It denatures enzymes of the heart/muscle
It causes Lysis of red blood cells
It causes cardiac arrest

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Chemistry
Pyrethrin used in mosquito coil is obtained from

An insect
A fungus
A bacterium
A seed plant

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Chemistry
Which one of the following minerals is found in Monazite sand ?

Thorium
Sodium
Uranium
Potassium

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Chemistry
A colloidal system in which a liquid is dispersed in a liquid is called

Emulsion
Gel
Sol
Precipitate

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