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Chemistry

Chemistry
Which one of the following is a micro-element ?

Chlorine
Nitrogen
Hydrogen
Oxygen

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Chemistry
What is 'milk of magnesia' chemically?

Sodium bicarbonate
Magnesium carbonate
Magnesium hydroxide
Calcium hydroxide

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Chemistry
Threshold limit value of copper in the atmospheric air is

0.001 mg/m3
5.0 mg/m3
1.0 mg/m3
0.01 mg/m3

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Chemistry
In a period from Li to F, ionisation potential

Increases
Decreases
Cannot be predicted
Remains same

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Chemistry
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

2
5
zero
4

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Chemistry
Freon' used as refrigerants is chemically

Chlorofluoro hydrocarbon
Fluorinated hydrocarbon
Chlorinated hydrocarbon
Fluorinated aromatic compound

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MORE MCQ ON Chemistry

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