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Chemistry

Chemistry
The number of waves in n x 10th Bohr's orbit are

n3
n
n-2
n2

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Chemistry
How many neutrons does iron have

13
30
26
8

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Chemistry
Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ?

Nitrous oxide
Sulphur dioxide
Carbon dioxide
Chlorofluorocarbon

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Chemistry
Silk fibre chemically is :

Carbohydrate
Cellulose
Fat
Protein

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Chemistry
Molasses a by-product in the manufacture of sugar, is converted into

Paper
Alcohol
Pulp
Fuel

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Chemistry
Which of the following is a natural dye ?

Alizarin
Aniline blue
Crystal violet
Phenolphthalein

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MORE MCQ ON Chemistry

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