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metal is alloyed with gold and silver fo...

____________ metal is alloyed with gold and silver for making coins and jewels.

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What are the favourable qualities given to gold when it is alloyed with copper of silver for the purpose of making oranaments?

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DINESH PUBLICATION-IS MATTER AROUND US PURE-SAQs
  1. The 'sea-water' can be classified as a homogeneous as well as heteroge...

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  2. While diluting a solution of salt in water, a student by mistake added...

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  3. What would you observe when (a) a saturated solution of potassium ch...

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  4. Explain why particles of a colloidal solution do not settle down when ...

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  5. Smoke and fog both are aerosols. In what way are they different?

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  6. Classify the following as physical or chemical properties. (a) The ...

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  7. The teacher instructed three students 'A', 'B' and 'C' respectively t...

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  8. Name the process associated with the following (a) Dry ice is kept a...

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  9. A sample of water under supply was found to boil at 102^(@)C at normal...

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  10. metal is alloyed with gold and silver for making coins and jewels.

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  11. An element is sonorous and highly ductile. Under which category would ...

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  12. Give an example each for the mixture having the following characterist...

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  13. Fill in the blanks. (a) A colloid is a ……… mixture and its component...

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  14. Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixe...

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  15. Give some examples of Tyndall effect observed in your surroundings?

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  16. Can we separate a mixture of alcohol and water by the use of a separat...

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  17. On heating calcium carbonate gets converted into calcium oxide and car...

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  18. Non-metals are usually poor conductors of heat and electricity. They a...

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  19. Classify the substances given in Figure into elements and compounds.

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  20. Which of the following are not compounds ? (a) Bromine gas (b) sodi...

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