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what is the other name for impure substances? Give two example of impure substance .

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LAKHMIR SINGH & MANJIT KAUR-IS MATTER AROUND US PURE -Exercise
  1. What are the two types of pure substance ? Give one example o...

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  2. Which of the following materials fall in the category of a pure substa...

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  3. what is the other name for impure substances? Give two exampl...

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  4. which of the following substance are elements ? water , salt ...

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

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  6. Name two solid , two liquid and two gaseous elements at the r...

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  7. Explain why , hydrogen and oxygen are considered elements where...

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  8. what are the three group into which all the elements can be div...

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  9. State two physical properties on the basis of which metals can ...

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  10. Compare the properties of metals and non -metals with respect to...

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  11. state any two properties for believing that aluminium is a meta...

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

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

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

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

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

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

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

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

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

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