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Chemistry

Chemistry
White phosphorus is generally kept under

Glycerine
Alcohol
Kerosene oil
Water

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Chemistry
The highest volume of gases in lower atmosphere is comprised of

Carbon dioxide
Oxygen
Nitrogen
Hydrogen

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Chemistry
The gas used in the artificial ripening of fruits is

Acetylene
Butane
Methane
Ethane

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Chemistry
Which is the purest commercial form of iron ?

Wrought iron
Pig iron
Steel
Stainless steel

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Chemistry
Conduction band electrons have more mobility than holes because they

Need less energy to move them
Experience collision less frequently
Are lighter
Have negative charge

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Chemistry
Which of the following gases is most toxic ?

Carbon dioxide
Carbon monoxide
Chlorine
Sulphur dioxide

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MORE MCQ ON Chemistry

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