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Explain law of chemical combinations....

Explain law of chemical combinations.

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CHETANA PUBLICATION- SOME BASIC CONCEPTS OF CHEMISTRY-EXERCISE
  1. Which of the following has the largest number of atoms ?

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  2. A sample of pure water , whatever the source always contains……………… by ...

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  3. The number of molecules in 22.4 cm^3 of nitrogen gas at STP is

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  4. In reaction N 2 + 3H2 rarr 2NH3 the ratio by volume ofN2 , H2 and NH...

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  5. The temperature at absolute zero is.

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  6. Define the term unit .

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  7. What is the ratio of molecules in 1 mole of NH3 and 1 mole of HNO3 ?

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  8. What is a chemical reaction ?

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  9. Calculate number of moles of hydrogen in 0.448 litre of hydrogen gas a...

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  10. How do atoms of an element exist in nature ?

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  11. How does Dalton 's atomic theory explain laws of chemical combination ...

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  12. Explain law of chemical combinations.

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  13. Explain the need of term Average atomic mass.

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  14. 3.49 g of ammonia at STP occupies volume of 4.48 dm^3. Calculate molar...

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  15. How many grams does an atom of hydrogen weigh ?

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  16. Calculate the number of moles and molecules of sulphur dioxide obtaine...

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  17. Define atomicity with example and explain Dalton 's atomic theory.

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  18. Explain the need of term Average atomic mass.

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  19. Calculate the mass of potassium chlorate required to librate 6.72 dm^3...

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  20. Define atomic mass. Chlorine has two stable isotopes , Cl-35 and Cl-...

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