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Chemistry

Chemistry
An example of heterocyclic compound is

Furan
Naphthalene
Anthracene
Benzene

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Chemistry
Hardness of the water is commonly measured in terms of

Magnesium carbonate equivalents
Calcium sulphate equivalents
Calcium carbonate equivalents
Magnesium sulphate equivalents

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Chemistry
Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as

Independent
Synergism
Antagonism
Additives

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Chemistry
Dry powder fire extinguishers contain

Sand and sodium carbonate
Sand and potassium carbonate
Sand
Sand and sodium bicarbonate

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Chemistry
In chemical terms, what are alums used for purifying water for drinking purposes ?

Nitrates of aluminium
Double nitrate
Double sulphates
Hydrated chlorides

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Chemistry
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

0.01 minute
13 days
3 billion years
100 years

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MORE MCQ ON Chemistry

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