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Chemistry

Chemistry
Which of the following pollutants is main product of automobile exhaust ?

NO
CO
CO2
Hydrocarbons

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Chemistry
Which one of the following is also known as solution ?

A compound
A homogeneous mixture
A suspension
A heterogeneous mixture

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Chemistry
The element with highest first ionisation energy is

Helium
Hydrogen
Lithium
Sodium

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Chemistry
Concentration of a material which is lethal to 50% animal is called

NOAEL
ADI
LD50
LC50

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Chemistry
Which metal is extracted from sea water?

Potassium
Aluminium
Beryllium
Magnesium

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Chemistry
Which of the following is biodegradable ?

Aluminium
Paper
Plastic
D.T.

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