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Chemistry

Chemistry
When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to

N2O
SO2
SO3
NO2

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Chemistry
The constituents of automobile exhaust that can cause cancer is/are :

Oxides of nitrogen
Lead
Carbon monoxide
Polycyclic hydrocarbons

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Chemistry
Which one among the following is not a mixture?

Glass
Graphite
Brass
Steel

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Chemistry
Which among the following is used to dilute oxygen in the gas cylinders used by divers ?

Argon
Krypton
Neon
Helium

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Chemistry
Chemical name of common salt is

Sodium
Sodium Chloride
Sodium Bicarbonate
Sodium Oxide

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Chemistry
The inherited traits of an organism are controlled by

enzymes
nucleotides
DNA molecules
RNA molecules

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