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Chemistry

Chemistry
The most electropositive elements among the following is

Cs
Na
K
Ca

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Chemistry
Which of the following contains high content of lead?

Coal
Cooking gas
High octane fuel
Low octane fuel

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Chemistry
The chemical name of 'laughing gas' is

Nitrogen pentoxide
Nitrous oxide
Nitrogen dioxide
Nitric oxide

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Chemistry
Which of the following is not a precious/semi-precious stone?

Sapphire
Pearl
Emerald
Ruby

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Chemistry
The chief constituent of natural gas is:

Helium
Propane
Methane
Nitrogen

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Chemistry
Higher concentration of nitrogen dioxide in atmosphere air causes

Cancer
Asphyxiation
Corrosion
Bronchitis

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MORE MCQ ON Chemistry

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