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Chemistry

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

0.658
0.727
0.305
0.509

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Chemistry
The anode of a dry cell is made up of

Zinc
Lead
Cadmium
Iron

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Chemistry
Which one is a sublime substance?

Table salt
Iodine
Potassium Iodide
Sugar

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Chemistry
An acid having basicity one is

Phosphoric acid
Disodium hydrogen phosphate
Sodium dihydrogen phosphate
Sodium phosphate

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Chemistry
Iodex, a pain relief balm, has the smell of ________ .

Methyl salicylate
Propyl salicylate
Butyl salicylate
Ethyl salicylate

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Chemistry
The most abundant constituent of atmospheric air is :

Carbon
Hydrogen
Nitrogen
Oxygen

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MORE MCQ ON Chemistry

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