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Chemistry

Chemistry
Which one of the following is not coal variety?

Peat
Dolomite
Bituminous
Lignite

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Chemistry
The new strain of bacteria produced by biotechnology in alcohol industry is

Pseudomonas putida
Bacillus subtilis
Saccharomyces cerevisiae
Escherichia coli

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Chemistry
Which gas does not form the part of atmosphere ?

None of these
Nitrogen
Helium
Chlorine

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Chemistry
The most electronegative element among the following is

sodium
fluorine
oxygen
bromine

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Chemistry
Which one of the following is not a fertilizer?

Potassium nitrate
Calcium ammonium nitrate
Calcium sulphate
Ammonium sulphate

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Chemistry
What is the atomic number of Oxygen

22
12
8
5

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