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Expres the following up to three signifi...

Expres the following up to three significant figures:
(i) 4.309251 (ii) 49.793500 (iii) 0.005728 (iv) 7000
(v) `2.67876xx10^(3)`
(vi) decimal equivalent of 2/3,

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CHHAYA PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-WARM UP EXERCISE
  1. Name two drugs which causes intoxication when consumed.

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  2. How many significant figures are there in each of following number: (i...

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  3. Expres the following up to three significant figures: (i) 4.309251 (...

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  4. Is it correct to consider the law of conservation of mass as the law o...

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  5. Mention the limitations of the law of conservation of mass.

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  6. Mention the limitations of the law of constant proportions.

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  7. On heating of 4.9g of KClO(3),1.92g" of "O(2) is evolved and 2.97g of ...

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  8. Is the converse of the law of definite proportions always correct? Exp...

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  9. State gay-lussac's law of gaseous volumes.

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  10. 10.1g of HCl is mixed with 6.3g of NaHCO(3). Calculate the mass of CO(...

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  11. According to Dalton's theory, 'during chemical combination, atoms of d...

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  12. Define an atom in view of Dalton's atomic theory.

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  13. Which postulate of Dalton's atomic theory is more or less valid even t...

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  14. Mention of limitations of Dalton's atomic theory.

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  15. What are Daltonide compounds and Berthollide compounds?

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  16. Mention a compound where the constituents atoms are not present in a s...

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  17. How do the discoveries of isotopes and isobars modify Dalton's atomic ...

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  18. State the converse statement of Avogadro's hypothesis and indicate its...

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  19. What are elementary molecules and compound molecules? Give examples?

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  20. Apply Avogadro's hypothesis to establish gay-lussac's law of gaseous v...

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