Page 98 - ICSE Science 3 : E-book

B. Tick () the correct answer.

1. Which of these is a soluble substance?

(a) Oil (b) Sand (c) Salt

2. Solvent is commonly a ____________ substance.

(a) solid (b) gas (c) liquid

3. The substance present in larger quantity in which another substance

present in smaller quantity dissolves completely is called ____________.
(a) solute (b) solvent (c) solution

4. Which of these will fl oat on water?
(a) Sand (b) Stone (c) Ice

5. Which condition makes a solute dissolve faster in a solvent?

(a) When the solute is broken into smaller pieces

(b) When the quantity of solute is more
(c) When it is added in cold water

C. Answer the following in one word.

1. Formed when solute dissolves completely in solvent ____________
2. Has no taste, colour, smell or shape ____________

3. Substances that do not dissolve in water at all ____________

D. Write (T) for true and (F) for false statements.

1. A solute dissolves faster in cold water.

2. Most of the substances dissolve in water to form a solution.

3. Water has a fi xed shape.

4. Sand is insoluble in water.

5. Objects such as stones and coins are denser than water which
makes them to sink in it.

E. Answer the following questions.

1. Why does water has a fi xed volume but no fi xed shape?

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