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Chemistry

Chemistry
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?

Cement
Glass
Gun powder
Paint

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Chemistry
When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to

SO3
SO2
N2O
NO2

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Chemistry
The percentage of oxygen in air is approximately

0.21
1
0.78
0.01

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Chemistry
Which one is the most dense liquid from the below

None of these
Water
Gasolin
Choloform

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Chemistry
The enzyme that converts glucose to ethyl alcohol is :

Diastase
Invertase
Maltase
Zymase

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Chemistry
Non-stick kitchenwares are coated with

Graphite
Silicon
Teflon
PVC

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MORE MCQ ON Chemistry

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