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Chemistry

Chemistry
Pyrethrin used in mosquito coil is obtained from

A fungus
A bacterium
A seed plant
An insect

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Chemistry
Which one of the following elements is used in the manufacture of fertilizers ?

Lead
Aluminium
Fluorine
Potassium

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Chemistry
The chemical name of rat poison is

Zinc oxide
Zinc phosphide
Lead nitrate
Potassium cyanide

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Chemistry
Which metal does not undergo corrosion due to the formation of oxide layer?

Zinc
Iron
Copper
Aluminium

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Chemistry
Emulsifier is an agent which

Homogenizes the emulsion
Stabilizes an emulsion
Accelerates the dispersion
Aids the flocculation of emulsion

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Chemistry
Coal is formed from

Coke
Deposit of animal waste
Crude oil
Compressed and hardened biomass

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