EASY
9th CBSE
IMPORTANT
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An alloy is a mixture of two or more elements. Bronze is an alloy of
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Important Questions on Is Matter around Us Pure
EASY
9th CBSE
IMPORTANT
Which is the incorrect pair?
EASY
9th CBSE
IMPORTANT
Oil and water is separated by separating funnel. What could be the justification?
EASY
9th CBSE
IMPORTANT
Given below is the characteristic of mixtures. Which of these is / are not true?
I. A mixture has no definite melting point
II. A mixture is always homogeneous in nature
III. Water is an example of mixture
IV. A mixture has a definite boiling point
EASY
9th CBSE
IMPORTANT
Which of these can be classified as elements?
Salt, water, hydrogen, sodium, oxygen
EASY
9th CBSE
IMPORTANT
Identify what will happen if wheat flour is added to a glass of water and stirred properly?
MEDIUM
9th CBSE
IMPORTANT
Solid-solid homogeneous mixture can be separated by
EASY
9th CBSE
IMPORTANT
Air is a mixture, why, choose proper reasons:
I. It has no fixed chemical formula
II. It varies in its composition
III. It involves energy change
EASY
9th CBSE
IMPORTANT
Which of the following are not physical changes?
(i) Juice freezes in refrigerator
(ii) Gasoline is ignited
(iii) Rusting of iron rod
(iv) Water evaporates from the river
