NCERT Solutions

Visit your kitchen and observe how your parents have organised various edibles. Can you suggest a better sorting method? Write it in your notebook.

The containers which are used to store materials in shops and at home are usually transparent. Give your reasons for this.

You need to have containers for collection of: (i) food waste, (ii) broken glass and (iii) wastepaper. Which materials will you choose for containers of these types of waste? What properties of materials do you need to think of?

Imagine you have two mysterious materials, X and Y . When you try to press material X, it feels rigid and does not change its shape easily. On the other hand, material Y easily changes its shape when you press it. Now, when you mix both materials in water, only material X dissolves completely, while material Y remains unchanged. What can materials X and Y be? Can you identify whether material X is hard or soft? What about material Y? Justify your answer.

You are provided with the following materials-vinegar, honey, mustard oil, water, glucose and wheat flour.

Make any two pairs of materials where one material is soluble in the other. Now, make two pairs of materials where one material remains insoluble in the other material.

Find the companion.

Link the following words by putting arrows between words that have a connection.

Iron Transparent Copper Solid Bottle Plastic Lustrous Wood Opaque

Glass