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Give reason: Sodium, potassium and lit...

Give reason:
Sodium, potassium and lithium are stored under oil

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Sodium and potassium are stored in kerosene because they are highly reactive elements. They can easily catch fire even when in contact with air.
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Give reasons (a) Platinum, gold and silver are used to make jewellery. (b) Sodium, potassium and lithium are stored under oil. (c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking. (d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

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NCERT-MATERIALS : METALS AND NON-METALS-QUESTION
  1. Fill in the blanks: Phosphorus is a very non-metal

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  2. Fill in the blanks: Metals are conductors of heat and .

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  3. Fill in the blanks: Iron is reactive than copper.

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  4. Metals react with acids to produce gas.

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  5. Mark 'T' if the statement is true and 'F' if it is false. Generally,...

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  6. Mark 'T' if the statement is true and 'F' if it is false. Sodium is ...

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  7. Mark 'T' if the statement is true and 'F' if it is false. Copper dis...

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  8. Mark 'T' if the statement is true and 'F' if it is false. Coal can b...

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  9. Some properties are listed in the following Table. Distinguish between...

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  10. Give reasons for the following. Aluminium foils are used to wrap foo...

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  11. Give reasons for the following. Immersion rods for heating liquids a...

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  12. Give reasons for the following. Copper cannot displace zinc from its...

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  13. Give reason: Sodium, potassium and lithium are stored under oil

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  14. Can lemon pickle be stored in an aluminium utensil? Explain.

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  15. Match the substances given in Column A with their uses given in Column...

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  16. What happens when Dilute sulphuric acid is poured on a copper plate?

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  17. What happens when Iron nails are placed in copper sulphate solution?...

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  18. Saloni took a piece of burning charcoal and collected the gas evolved ...

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  19. Prateek took a piece of burning charcoal and collected the gas evolved...

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  20. One day Kavita went to a jewellers shop with her mother. Her mother ga...

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