Materials: Metals and Non Metals Class 8 Science NCERT
Materials: Metals and Non Metals Class 8 Science NCERT
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30 mins
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Sep 2021
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What you will learn
Q.1. Which of the following can be beaten into thin sheets? (a) Zinc (b) Phosphorus (c) Sulphur (d) Oxygen
Q.2. Which is correct? All metals are ductile. (b) All non-metals are ductile. (c) Generally, metals are ductile. (d) S
3. Fill in the blanks. (a) Phosphorus is a very _________ non-metal. (b) Metals are conductors of heat and ____. (c) Iron is _________reactive than copper.
4. Mark ‘T’ if the statement is true and ‘F’ if it is false. (a) Generally, non-metals react with acds. (b) Sodium is a very reactive metal.
4. Mark True/False (c) Copper displaces zinc from zinc sulphate solution. (d) Coal can be drawn into wires.
Q. 5. Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties.
Q. 6. Give reasons (a) Aluminium foils are used to wrap food items. (b) Immersion rods for heating liquids are made of metallic substances.
Q. 6. Give reasons- (c) Copper cannot displace zinc from its salt solution. (d) Sodium and potassium are stored in kerosene.
Q. 7. Can you store lemon pickle in an aluminium utensil? Explain. Q.8. Match the substances given in Column A with their uses given in Column B.
Q. 9. What happens when (a) Dilute sulphuric acid is poured on a copper plate? (b) Iron nails are placed in copper sulphate solution?
Q. 10. Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. (a) How will she find the nature of the gas ?
Q.10 (b) Write down word equations of all the reactions taking place in this process.
Q.11. Reason for loss in weight of gold jewellery when it is returned by goldsmith after polishing?
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8/16/2021
course created date
9/12/2021
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