Set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one among the following statements regarding the properties of mixtures and compounds is not correct?

a) The constituents of a mixture can be separated by physical methods but those of a compound cannot be separated by physical methods

b) A mixture shows the properties of its constituents but the properties of a compound are entirely different from its constituents

c) A mixture may be homogeneous or heterogeneous but a compound is a homogeneous substance

d) Energy is either absorbed or evolved during the preparation of a mixture but not in the preparation of a compound

Question : 2

When a gas is compressed keeping temperature constant, it results in

a) decrease in speed of gaseous molecules

b) increase in speed of gaseous molecules

c) increase in collision among gaseous molecules

d) decrease in collision among gaseous molecules.

Question : 3

Blue vitriol is

a) Iron sulphate

b) Copper sulphate

c) Calcium sulphate

d) Sodium sulphate

Question : 4

In which one of the following situations a chemical reaction does not occur?

a) Sodium is placed in water

b) Common salt is exposed to air

c) Coal is burnt in air

d) Iron is kept in moist air

Question : 5

Who among the following is called 'The father of modern chemistry?

a) Proust

b) Michael Faraday

c) Lavoisier

d) Linus Pauling

Question : 6

At higher altitudes

a) no change in boiling point

b) boiling point of a liquid increases

c) boiling point of a liquid decreases

d) melting point of solid increases