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Chemistry

Chemistry
Nitrogen is an essential constituent of all :

Proteins
Fats
Carbohydrates
Vitamins

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Chemistry
Freon' used as refrigerants is chemically

Chlorofluoro hydrocarbon
Fluorinated hydrocarbon
Fluorinated aromatic compound
Chlorinated hydrocarbon

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Chemistry
When quick lime is added to water

Heat is absorbed
Heat is liberated
No heat change takes place
Temperature decreases

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Chemistry
Methanoic and ethanoic acids can be distinguished by the action of

NaHCO3
NaOH
Tollen's reagent
SOCl2

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Chemistry
In addition to hydrogen, the other abundant element present on Sun’s surface is

Oxygen
Argon
Neon
Helium

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Chemistry
The electronic configuration of an atom having atomic number ‘20’ is

2, 8, 8, 2
2, 10, 8
2, 6, 8, 4
2, 8, 10

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