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Chemistry

Chemistry
The value of Avogadro Number is

6.023 × 1025
6.023 × 1023
6.023 × 1024
6.023 × 1022

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Chemistry
Copper is refined by

Zone refining
Electrolysis
Oxidation
Roasting

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Chemistry
The filter over which sewage is sprinkled is called as

Trickling filter
Intermittent sand filter
Percolating filter
Contact bed

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Chemistry
Bhopal gas tragedy is associated with leakage of

Nitrogen dioxide
Carbon dioxide
Methyl isocyanate
Sulphur dioxide

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Chemistry
What are the major pollutants of cigarette smoke?

Carbon monoxide and dioxin
Carbon monoxide and benzene
Dioxin and benzene
Carbon monoxide and nicotine

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Chemistry
The most abundant rare gas in the atmosphere is

Xe
Ar
He
Ne

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MORE MCQ ON Chemistry

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