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How would you confirm that a colourless liquid given to you is pure water ?

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LAKHMIR SINGH & MANJIT KAUR-IS MATTER AROUND US PURE -Exercise
  1. state any two properties for believing that aluminium is a meta...

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  2. Give reason why : (a) Copper metal is used for making electric...

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  3. How would you confirm that a colourless liquid given to you is pu...

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  4. Choose the solutions from among the following mixttures : Soil,...

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  5. state three reasons why you think air is a mixture and water ...

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  6. state three reasons why you think air is a mixture and water ...

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  7. Define a compounds Give two points of evidence to show that sodi...

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  8. Define a mixture ,Give two points of evidence to show that su...

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  9. state two reasons for supposing that brass is a mixture and no...

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  10. List five characteristics by which compounds can be distingushed ...

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  11. Explain why ,a solution of salt in water is comsidered a mixture ...

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  12. state one property in which a solution of sugar in water resembl...

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  13. How will you distinguish a colloid from a solution ?

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  14. Name a non- metal: (a) which is lustrous (b) which is requi...

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  15. Name a metal : (a) which can be easily cut with a knife (b) ...

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  16. Which of the following are not compounds? (a) Chlorine gas (b) Pota...

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  17. (a) state the main points of difference between homogenous and ...

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  18. (a) what is meant by (i) element (ii) compounds ,and (iii ) mixt...

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  19. (a) what are (i) metals (ii) non-metals ,and (iii) metallloids ? Giv...

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  20. List the points of differences between homogeneous and heterogenous mi...

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