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Chemistry

Chemistry
Which is a natural colloid ?

Cane-sugar
Urea
Blood
Sodium chloride

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Chemistry
The percentage of carbon in cost iron is :

0.01 to 0.25
3 to 5
0.5 to 1.5
6 to 8

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Chemistry
The presence of ozone in the stratosphere is responsible for

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

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Chemistry
Detergents are

Sodium salt of benzoic acid
Sodium salts of sulphonic acids
None of these
Sodium salts of fatty acids

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Chemistry
Burning pyrites ore gives out

Nitrogen dioxide gas
Nitric oxide gas
Carbon dioxide gas
Sulphur dioxide gas

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Chemistry
The basic chemical building block of natural rubber obtained from trees is

Vinyl Chloride
Isoprene
Acetylene
Neoprene

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MORE MCQ ON Chemistry

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