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Chemistry

Chemistry
The hottest part of the gas flame is known as

luminous zone
dark zone
blue zone
non-luminous zone

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Chemistry
Aerated water contains

H2
CO2
NO2
SO2

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Chemistry
'Fire-fighting clothes' are made from

Talc
Mica
Steatite
Asbestos

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Chemistry
Which of the following chemicals is used in photography ?

Aluminium hydroxide
Silver bromide
Sodium chloride
Potassium nitrate

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Chemistry
Which one of the following is used for dating very old objects of archaeological importance?

Phosphorus-31
Radium
Tritium
Carbon-14

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Chemistry
The molecular mass of a gas is

Equal to its vapour pressure
Half its vapour pressure
Not related to its vapour pressure
Twice its vapour pressure

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