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Chemistry

Chemistry
Mercury is emitted into air by

Steam engine
Burning coal
Coal fire
Burning garbage

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Chemistry
Pollutant from motor car exhaust that causes mental disease is

NO2
Hg
SO2
Lead

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Chemistry
The chemical name of baking soda is

Sodium bicarbonate
Sodium chloride
Sodium carbonate
Sodium nitrate

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Chemistry
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

atomic structure
discovery of elements
periodic table of contents
metallurgy

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Chemistry
The rusting of iron is a/an

Electrochemical change
Electrical change
Physical change
None of these

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

LD50
ADI
LC50
NOAEL

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MORE MCQ ON Chemistry

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