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Chemistry

Chemistry
The purest form of Iron is :

Steel
Cast iron
Pig iron
Wrought iron

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Chemistry
The temperature of oxy-acetylene flame is around

3600°C
3200°C
4000°C
2800°C

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Chemistry
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

4.84 x 1017
6.023 x 1023
1.568 x 103
6.023 x 1019

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Chemistry
Muddy water is treated with alum in purification process, itis termed as :

Adsorption
Emulsification
Coagulation
Absorption

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Chemistry
The depletion of Ozone layer is mainly due to

Radioactive rays
Volcanic eruptions
Chlorofluorocarbons
Aviation fuels

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Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.201
0.323
0.158
0.273

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MORE MCQ ON Chemistry

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