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Chemistry

Chemistry
The chemical name of rat poison is

Zinc phosphide
Potassium cyanide
Lead nitrate
Zinc oxide

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Chemistry
The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas

Will be reduced to half
Will be doubled
Will increase four-fold
Remains unchanged

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Chemistry
The polymer used in making plastic crockery is

Bakelite
Decron
Melamine
Nylon

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Chemistry
The presence of ozone in the stratosphere is responsible for

Checking the penetration of ultra-violet rays to the earth
Supplying oxygen for people travelling in jets
Higher rate of photosynthesis
Increasing the average global temperature in recent years

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Chemistry
The first metal used by man was

bronze
copper
iron
gold

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Chemistry
Soldering of two metals is possible because of the property of :

Cohesion
Surface tension
Viscosity
Osmosis

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MORE MCQ ON Chemistry

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