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Chemistry

Chemistry
Silicon is a

Insulator
Semiconductor
Nonconductor
Conductor

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Chemistry
Percentage of carbon in steel ranges from

1.5 to 3.0
0.1 to 1.5
3.0 to 4.0
4.0 to 6.0

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Chemistry
The atmospheric gas that is mainly responsible for Green House effect :

Carbondioxide
Nitrogen
Ozone
Oxygen

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Chemistry
Rock salt is a mineral containing

Magnesium
Sodium
Iron
Potassium

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Chemistry
In which of the following substances all carbon atoms are quaternary in nature ?

Napthalene
Graphite
Teflon
Diamond

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Chemistry
Which one of the following is commonly used for pulp bleaching in the paper industry?

Mild sulphuric acid
Hydrogen peroxide
Glucose isomerase
Iodine and water

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