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Name any two laws of chemical combina...

Name any two laws of chemical combination.

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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. Which postulate of Dalton’s atomic theory can explain the law of def...

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  2. Which ancient India philosopher suggested that all matter is composed...

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  3. Name any two laws of chemical combination.

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  4. If 100 grams of pure water taken from different sources is decomposed ...

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  5. If 100 grams of calcium carbonate (whether in the form of marble or ...

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  6. What are the builiding blocks of matter ?

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  7. How is the size of an atom indicated ?

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  8. Name the unit in which the radius of an atom is usually expressed.

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  9. Write the relation between nanometre and metre.

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  10. The radius of an oxygen atom is 0.073 nm. What does the symbol 'nm' ...

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  11. State whether the following statement is true or false : The symbol...

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  12. Define 'molecular mass' of a substance.

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  13. What is meant by saying that 'the molecular mass of oxygen is 32'...

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  14. Fill in the following blanks with suitable words : (a) In water , t...

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  15. (a) Name the element used as a standard for atomic mass scale. (b) W...

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  16. Give one major drawback to Dalton's atomic theory of matter.

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  17. Dalton's atomic theory says that atoms are indivisible. Is this stat...

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  18. Is it possible to see atoms these days? Explain your answer.

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  19. What is meant by the symbol of an element ? Explain with example...

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  20. (a) Give two symbols which have been derived from the "English names ...

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