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Classify following substances as element...

Classify following substances as element, compounds and mixtures : water, tea, silver, steel, carbon dioxide and platinum.

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CBSE COMPLEMENTARY MATERIAL-SOME BASIC CONCEPTS OF CHEMISTRY -2-MARKS QUESTIONS
  1. Classify following substances as element, compounds and mixtures : wat...

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  2. The body temperature of a normal healthy person is 37^(@)C. Calculate ...

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  3. At what temperature will both the Celsius and Fahrenheit scales read t...

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  4. Convert 5L into m^(3).

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  5. What does the following prefixes stand for : (a) pico (b) ...

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  6. How many significant figures are present in the following : (i) 4...

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  7. Convert ‘450 pm’ into SI unit and write the answer in scientific notat...

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  8. Hydrogen peroxide and water contain 5.93% and 11.2 % of hydrogen respe...

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  9. The density (in g mL^(-1)) of a 3.60M sulphuric acid solution that is ...

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  10. The cost of table salt ( NaCl ) is Rs. 10 per Kg. calculate its cost ...

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  11. Calculate the mole fraction of the solute in a 1.00 molal aqueous sol...

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  12. Dissolving 120g of urea (mol wt = 60) in 1000g of water gave a solutio...

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  13. Calculate the percentage of N in urea. (Molar mass of urea = 60" g mo...

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  14. 25 mL of 3.0 M HCl are mixed with 75 mL of 4.0 M HCl. If the volumes a...

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  15. How many atoms and molecules are present in 1.24 gm of phosphorus (...

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  16. 45.4L of dinitrogen reacted with 22.7L of dioxygen and 45.4 L of nitro...

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  17. Give one example each of a molecule in which the empirical and molecul...

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  18. Calculate the number of moles in the following masses : (i) 7.85g o...

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  19. Calculate the percent of carbon, hydrogen and oxygen in ethanol (C(2)H...

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  20. How much copper can be obtained from 100 g of CuSO(4) ?

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