Question

2 gram of powdered copper sulphate are added to 20 cc of water and the contents thoroughly stirred. The products so obtained is called. A colloidal solution B heterogeneous solution C homogeneous solution
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Answer 1

Answer:

What is a Mixture?

Mixtures are constituted by more than one kind of pure form of matter, known as a substance. A substance cannot be separated into other kinds of matter by any physical process. We know that dissolved sodium chloride can be separated from water by the physical process of evaporation. However, sodium chloride is itself a substance and cannot be separated by physical process into its chemical constituents. Similarly, sugar is a substance because it contains only one kind of pure matter and its composition is the same throughout. Soft drink and soil are not single substances. Whatever the source of a substance may be, it will always have the same characteristic properties.Therefore, we can say that a mixture contains more than one substance.

Types of Mixtures

Depending upon the nature of the components that form a mixture, we can have different types of mixtures.

Activity : 1

Let us divide the class into groups A, B, C and D.

• Group A takes a beaker containing 50 mL of water and one spatula full of copper sulphate powder.

• Group B takes 50 mL of water and two spatula full of copper sulphate powder in a beaker.

• Groups C and D can take different amounts of copper sulphate and potassium permanganate or common salt (sodiumchloride) and mix the given components to form a mixture.

• Report the observations on the uniformity in colour and texture.