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Chemistry

Chemistry
Which of the following is used for refrigeration?

Phosphine
Chlorine
Sulphur dioxide
Freon

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Chemistry
Cinnabar is an ore/mineral of

Molybdenum
Mercury
Lead
Manganese

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Chemistry
Which of the following is an iron ore ?

Bauxite
Magnetite
Lignite
Nitrite

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Chemistry
How many electrons can be accommodated in d-orbital

8
10
3
6

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Chemistry
Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ?

Methyl orange
Methylene blue
Methyl red
Phenolphthaline

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Chemistry
Laughing gas is

Nitrogen pentoxide
Nitric oxide
Nitrous oxide
Nitrogen trioxide

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MORE MCQ ON Chemistry

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