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What does symbol SI signify ? Name the s...

What does symbol SI signify ? Name the seven basic SI units ?

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PRADEEP-SOME BASIC CONCEPTS OF CHEMISTRY-ADDITIONAL QUESTIONS (SHORT ANSWER QUESTIONS)
  1. Classify the following as pure substances or mixtures. Separate the pu...

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  2. Give three main points of difference between a compound and a mixture.

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  3. What does symbol SI signify ? Name the seven basic SI units ?

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  4. Define precision and accuracy.

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  5. What do you mean by significant figures?

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  6. Under what conditions the zeros in a number are significant ?

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  7. What do you understand by unit conversion factor ? How does it help to...

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  8. After rounding off 1.235 and 1.225, we will have their answer respecti...

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  9. Give one experiment involving a chemical reaction to prove that the la...

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  10. Copper oxide obtained by heating copper carbonate or copper nitrate co...

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  11. N and O combine with H to form NH(3) and H(2)O and they combine with e...

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  12. Define Gay Lussac's law of gaseous volume. Explain with one suitable e...

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  13. What are the postulates of Modern Atomic Theory?

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  14. Which isotope is used as a reference on the atomic scale ? What is one...

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  15. Why atomic mass is an average value ? Explain with suitable example.

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  16. How is mole related to (i) mass, (ii) volume and (iii) number of mol...

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  17. What is the SI definition of mole?

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  18. Comment on the statement : '1 mole of hydrogen'

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  19. What is the difference between (i)Normality and Molarity ? (ii) Molari...

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  20. Define Empirical formula and Molecular formula. What is the relationsh...

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