Identify the solutions among the following mixtures.
- Soil
- Sea water
- Air
- Coal
- Soda water
The Correct Option is B, C,
Solution and Explanation
Sea water, air and soda water: Sea water is a homogeneous mixture of various minerals and salts in water. Air is a homogeneous mixture of nitrogen, oxygen and several other gases. Soda water is a homogeneous mixture of carbon dioxide gas dissolved in water.
Coal, Soil: Heterogeneous solution.Coal and soil may seem as a single phase, but due to their inconsistent composition, they cannot be categorized as solutions.
Thus, the correct options are (b), (c), and (e).
Top Questions on What are the Types of Pure Substances?
- Classify the following into elements, compounds and mixtures.
(a) Sodium
(b) Soil
(c) Sugar solution
(d) Silver
(e) Calcium carbonate
(f) Tin
(g) Silicon
(h) Coal
(i) Air
(j) Soap
(k) Methane
(l) Carbon dioxide
(m) Blood- CBSE Class IX
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Which of the following materials fall in the category of a “pure substance”?
(a) Ice
(b) Milk
(c) Iron
(d) Hydrochloric acid
(e) Calcium oxide
(f) Mercury
(g) Brick
(h) Wood
(i) Air- CBSE Class IX
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- Match the phrases in Column A with their meanings in Column B.
A B (i) broke out (a) an attitude of kindness, a readiness to give freely (ii) in accordance with (b) was not able to tolerate (iii) a helping hand (c) began suddenly in a violent way (iv) could not stomach (d) assistance (v) generosity of spirit (e) persons with power to make decisions (vi) figures of authority (f) according to a particular rule, principle, or system - CBSE Class IX
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ABC is a triangle in which altitudes BE and CF to sides AC and AB are equal (see Fig). Show that
(i) ∆ ABE ≅ ∆ ACF
(ii) AB = AC, i.e., ABC is an isosceles triangle.
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- What did his father say to this?
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Section
Number of girls per thousand boys Scheduled Caste (SC)
940
Scheduled Tribe (ST)
970
Non-SC/ST
920
Backward districts
950
Non-backward districts
920
Rural
930
Urban
910
(i) Represent the information above by a bar graph.
(ii) In the classroom discuss what conclusions can be arrived at from the graph.- CBSE Class IX
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