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Chemistry

Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.201
0.158
0.273
0.323

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Chemistry
Threshold limit value of copper in the atmospheric air is

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

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Chemistry
KMnO4 can be used as a/an

Disinfectant
Pesticide
Insecticide
Fertiliser

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Chemistry
Total number of elements in the Periodic table

127
118
112
115

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Chemistry
The oil used in the froth floatation process is

olive oil
kerosene oil
pine oil
coconut oil

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Chemistry
The number of electrons presents in H+ is

one
two
three
zero

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MORE MCQ ON Chemistry

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