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Why the bond length of BF3 is less than ...

Why the bond length of `BF_3` is less than that of `BF_4`? Find the hybridi, sation of Cl in `CIO_4^+`.

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UNITED BOOK HOUSE-MODEL QUESTION PAPER 11-EXERCISE
  1. Arrange the element as per increasing electronegativity O, Te, Se, S. ...

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  2. Why the boiling point of NH3 is higher than that of PH3? Give an examp...

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  3. Why the bond length of BF3 is less than that of BF4? Find the hybridi,...

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  4. Calculate th r.m.s. velocities of CO2 at 27^@C. Show that C(rms) =sqrt...

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  5. Why the rain drops are spherical? Why the surface-tension of pb is hig...

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  6. Calculate the enthalpy for the reaction at 27^0C. C2 H5 Cl (s) rarr C...

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  7. Calculate Delta H-DeltaU at 25^@C for the reaction:H2(g)+( 1/2)O2(g) =...

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  8. What is the oxidation number of Mn in K2 Mn O4?

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  9. Calculate the oxidation no of * marked atom:*Fe (CO)5

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  10. Balance the equation by oxidation no method :AI + NaOH + H2O rarr NaAl...

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  11. Balance by oxidation number method P4 +NaOH + H2O rarr NaH2 PO2 + PH3...

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  12. What do you mean by Interstitial and non stoichiometric hydrides? Give...

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  13. Why K2 CO3 can’t be prepared by solvey process? What is backing soda?

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  14. What is carbene? How many types of carbene present? Give example.

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  15. 2AB2 (g) = 2AB (g) + B2 (g) if the degree of dissociation and total pr...

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  16. Calculate the pH 0.01 (m) ch3COOH at 25^@C. (Given dissociation con...

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  17. Write the, equation what happen when:Borax is' heated with ethanol and...

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  18. Write the, equation what happen when:Mixture of diborane and Ammonia i...

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  19. State reason :Why born nitrides is called inorganic graphite..

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  20. State reason :BH3 forms dimer.

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