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Chemistry

Chemistry
Which of the following is the strongest base in aqueous solution ?

Diethylamine
Ammonia
Ethylamine
Triethylamine

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Chemistry
The chief source of naphthalene is

Coal-tar
Camphor
Diesel
Charcoal

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Chemistry
Which of the following is not present in RNA

Thymine
Phosphate
Ribose
Uracil

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Chemistry
Earth’s atmosphere is an envelope of gases extending to a height of

300 km
150 km
100 km
200 km

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Chemistry
The iron ore magnetite consists of

Fe2O3
Fe3OH4
FeCO3
3Fe2O3 .. 3H2O

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Chemistry
Copper is refined by

Oxidation
Zone refining
Electrolysis
Roasting

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