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Chemistry

Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Silicon
Iron
Magnesium
Oxygen

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

0.201
0.273
0.158
0.323

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Chemistry
Milk tastes sour when kept in the open for sometime due to the formation of

Acetic acid
Citric acid
Lactic acid
Carbonic acid

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Chemistry
The influence of temperature on reaction rate is predicted by

Lewis equation
Van der Waals equation
Arrhenius equation
Kirchhoff's equation

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Chemistry
The hydronium ion is

H2+
H3O+
H+
HO -

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Chemistry
A thick paste of cement, sand and water is called

Kiln
R.C.C.
Mortar
Concrete

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MORE MCQ ON Chemistry

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