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Chemistry

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

0.323
0.273
0.158
0.201

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Chemistry
Hard steel contains

0.5 to 1.5 per cent carbon
2 to 5 per cent carbon
0.01 to 0.04 per cent carbon
0.1 to 0.4 per cent carbon

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Chemistry
Which one is the most reactive gaseous element

Flourine
Bromine
Iodine
Chlorine

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Chemistry
Gas released during Bhopal tragedy was :

Ethyl isothiocyanate
Methyl isothiocyanate
Sodium isothiocyanate
Potassium isothiocyanate

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Chemistry
Which one of the following nonmetals shows allotropy in the liquid state?

Bromine
Carbon
Phosphorous
Sulphur

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Chemistry
Heating of a ore below its melting point in the absence of air is known as

Roasting
Calcination
Refining
Smelting

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MORE MCQ ON Chemistry

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