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Balance the chemical equation by oxidati...

Balance the chemical equation by oxidation number method : `P + NaOH + H_(2)O to PH_(3) + NaH_(2)PO_(2) `

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CHHAYA PUBLICATION-PREVIOUS YEAR QUESTION PAPER 2016-WBCHSE 2016 SECTION II ( GROUP C)
  1. Why does the PCl(5) exist but NCl(5) does not ?

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  2. Why does BaSO(4) is not stable in water ?

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  3. For which property of the liquid the shape of a liquid drop is spheric...

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  4. In a 10 litre volumetric flask contains 1 gram He and 6.4 gram O(2) at...

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  5. If the standard formation- enthalpy of CS(2) , CO(2) and SO(2) are 117...

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  6. State Hess's Law .

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  7. Judge the spontaneity of the following reaction at 298 K temperature a...

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  8. Mention the oxidation number of two chlorine atoms in Ca(O Cl) Cl mole...

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  9. Balance the chemical equation by oxidation number method : P + NaOH + ...

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  10. What is the oxidation number of N atom is NaN(3) molecule ?

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  11. Balance the chemical equation by ion electron method : MnO(4)^(1-) + (...

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  12. A water sample contains 1 millimol of Mg^(2+) ion per litre . Calculat...

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  13. What do you understand by 'Trailing of Mercury' ?

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  14. Why do most of the lithium salts are present as hydrated one ?

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  15. Which of the alkaline earth metal hydroxides are amphoteric in nature ...

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  16. What is hydrolith ?

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  17. Why does BF(3) behave as Lewis acid ?

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  18. Write with equation what happens when ? Water is added to calcium carb...

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  19. By which property the stability of (CH(3))(3) C^(+) ion could be expla...

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  20. Why methane could not be prepared by Wurtz reaction ?

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