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What do you mean by significant figures?...

What do you mean by significant figures?

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PRADEEP-SOME BASIC CONCEPTS OF CHEMISTRY-NCERT (QUESTIONS AND EXERCISES WITH ANSWERS)
  1. What is the S.I. unit of mass ? How is it defined?

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  2. Match the following prefixes with their multiples: {:(,"Prefixes","...

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  3. What do you mean by significant figures?

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  4. A sample of drinking water was found to be severely contaminated with ...

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  5. Express the following in the scientific notation: (i) 0.0048, (ii) 2...

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  6. How many significant figures are present in the following? (i) 0.004...

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  7. Round up the following upto three significant figures: a. 34.216 b...

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  8. The following data are obtained when dinitrogen and dioxygen react to ...

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  9. If the speed of light is 3.0xx10^(8)ms^(-1), calculate the distance co...

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  10. In the reaction, A+B(2) rarr AB(2), identify the limiting reagent, if ...

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  11. Dinitrogen and dihydrogen react with each other to produce ammonia acc...

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  12. How are 0.50 mol Na(2)CO(3) and 0.50 M Na(2)CO(3) different?

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  13. If ten volumes of dihydrogen gas reacts with five volumes of dioxygen ...

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  14. Convert the following into basic units : (i) 28.7 pm (ii) 15.15 mus...

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  15. Which one of the following will have the largest number of atoms? (i...

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  16. Calculate the molarity of a solution of ethanol in water in which the ...

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  17. What will be the mass of one .^(12)C atom in g?

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  18. How many significant figures should be present in the answer of the fo...

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  19. Use data given in the following table to calculate the molar mass of n...

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  20. Calculate the number of atoms in each of the following a. 52 mol of ...

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