viii physics

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Cecil Convent School Science VIII M.M:10 1. What can be used as a substitute for wool? Why? 2. What happens when a metal reacts with a dilute acid? Explain with examples 3. Why is gold used for making jewellery? 4. What are metalloids? Name any two metalloids. 5. What are biodegradable and non-biodegradable materials? Give one example of each of them. 6. What is polymerisation? 7. What are blended fibres? Are they better than synthetic fibres? Give Examples. 8. Give reasons for the following: (a). Polythene bags should not be thrown along with garbage. (b). No gas is released when sulphur is added to dilute HCl . Cecil Convent School Science VIII M.M:10 1. What can be used as a substitute for wool? Why? 2. What happens when a metal reacts with a dilute acid? Explain with examples 3. Why is gold used for making jewellery? 4. What are metalloids? Name any two metalloids. 5. What are biodegradable and non-biodegradable materials? Give one example of each of them. 6. What is polymerisation? 7. What are blended fibres? Are they better than synthetic fibres? Give Examples. 8. Give reasons for the following: (a). Polythene bags should not be thrown along with garbage. (b). No gas is released when sulphur is added to dilute HCl .

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  • Cecil Convent School

    Science VIII

    M.M:10

    1. What can be used as a substitute for wool? Why?

    2. What happens when a metal reacts with a dilute acid? Explain with examples

    3. Why is gold used for making jewellery?

    4. What are metalloids? Name any two metalloids.

    5. What are biodegradable and non-biodegradable materials? Give one example of each

    of them.

    6. What is polymerisation?

    7. What are blended fibres? Are they better than synthetic fibres? Give Examples.

    8. Give reasons for the following:

    (a). Polythene bags should not be thrown along with garbage.

    (b). No gas is released when sulphur is added to dilute HCl .

    Cecil Convent School

    Science VIII

    M.M:10

    1. What can be used as a substitute for wool? Why?

    2. What happens when a metal reacts with a dilute acid? Explain with examples

    3. Why is gold used for making jewellery?

    4. What are metalloids? Name any two metalloids.

    5. What are biodegradable and non-biodegradable materials? Give one example of each

    of them.

    6. What is polymerisation?

    7. What are blended fibres? Are they better than synthetic fibres? Give Examples.

    8. Give reasons for the following:

    (a). Polythene bags should not be thrown along with garbage.

    (b). No gas is released when sulphur is added to dilute HCl .