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Chemistry

Chemistry
Which amidst the following is not a gem stone ?

Opal
Cat's-eye
Topaz
Pearl

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Chemistry
The elements with atomic numbers 9, 17, 35, 53, 85 are all

Halogens
Light metals
Heavy metals
Noble gases

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Chemistry
Higher concentration of nitrogen dioxide in atmosphere air causes

Asphyxiation
Bronchitis
Cancer
Corrosion

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Chemistry
Which of the following substance's smell is similar to Ethanoic acid?

Vinegar
Kerosene
Lemon
Tomato juice

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Chemistry
________ is used for making vinegar.

Acetic acid
Malic acid
Tartaric acid
Oxalic acid

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Chemistry
Heavy metals got their name because compared to other atoms they have

Higher atomic radii
Higher densities
Higher atomic numbers
Higher atomic masses

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MORE MCQ ON Chemistry

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