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Chemistry

Chemistry
Magnetite is

FeCO3
Fe3O4
2Fe2O3. 3H2O
Fe2O3

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Chemistry
The coloured discharge tubes for advertisement mainly contain

Helium
Neon
Xenon
Argon

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Chemistry
The enzyme that converts glucose to ethyl alcohol is :

Diastase
Invertase
Zymase
Maltase

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Chemistry
Which gas emitted by power stations causes acid rain?

Sulphur dioxide
Carbon dioxide
Helium
Nitrogen

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Chemistry
Nylon is a type of

Acrylic
Polyolefin
Polyamide
Polyester

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Chemistry
The water pollution in river is measured by the dissolved amount of

Ozone
Nitrogen
Chlorine
Oxygen

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