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How many significant figures the followi...

How many significant figures the following numbers possess?
(i) 3.60, (ii) 0.005, (iii) 5.629,(iv) `3.75 xx 10^(9)`

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(i) 3, (ii) 1, (iii) 4, (iv) 3
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ICSE-SOME BASIC CONCEPTS OF CHEMISTRY -VERY SHORT ANSWER TYPE QUESTIONS
  1. What for the abbreviation SI stands?

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  2. What are the units of acceleration, density and pressure in SI system?

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  3. How many significant figures the following numbers possess? (i) 3.60...

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  4. Express 6.022 xx 10^23 in the form of a number which contains only thr...

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  5. State Law of reciprocal proportions.

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  6. What is the unit of rate of chemical reaction ?

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  7. State Avogadro's hypothesis.

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  8. Which of the following molecules are homoatomic ? (i) H(2)O, (ii) O(...

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  9. What is meant by amu ?

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  10. Define the term mole.

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  11. What is the relationship between the atomic mass and actual mass of on...

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  12. An atom is 40.08 times as heavier as 1/12 mass of an atom of Cl2. What...

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  13. Name a compound whose empirical formula and molecular formula are equa...

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  14. How many gram atoms and gram molecules are present in 64.0 g of oxygen...

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  15. How many Ca^(2+) and Cl^(-) ions are present in one mole of CaCl2?

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  16. Is the following equation balanced ? C(2)H(5)OH + 2O(2) to 2CO(2) + ...

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  17. Define the term molarity.

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  18. What is the value of Avogadro's Number ?

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  19. What is the difference between the empirical formula and molecular for...

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  20. Why are atomic masses regarded as relative masses?

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