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Chemistry

Chemistry
The weight of 6.023 × 1022 atoms of carbon is

0.12 gms
1.2 gms
12 gms
120 gms

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Chemistry
In deep-sea diving, divers use a mixture of gases consisting of oxygen and

Helium
Argon
Hydrogen
Nitrogen

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Chemistry
Which one is a sublime substance?

Sugar
Potassium Iodide
Iodine
Table salt

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Chemistry
Which of the following is used as a preservative to protect processed food?

Saccharin
Sodium metabisulphite
Sodium sulphate
BHT

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Chemistry
Which type of radiations are absorbed by the upper layer of the atmosphere?

Ultraviolet
Infrared
Visible
Radio-waves

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Chemistry
The elements with atomic numbers 9, 17, 35, 53, 85 are all

Halogens
Light metals
Noble gases
Heavy metals

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