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Why are the bond angles of NH3 and H2O l...

Why are the bond angles of `NH_3` and `H_2O` less than the normal values of regular tetrahedron bond angles in spite of being `sp^3` hybridised?

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UNITED BOOK HOUSE-2015 Question Paper-EXERCISE
  1. Why is the first ionization enthalpy of helium maximum among all the e...

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  2. Arrange the following compounds is terms of ascending order of oxidisi...

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  3. Why are the bond angles of NH3 and H2O less than the normal values of ...

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  4. Find out the bond order of H2^+ ion.

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  5. What are the types of hybridisation of NH4^+.CO3^(2+) H2S and SF6?

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  6. C-O bond is polar but CO2 does not have a dipole moment. Why?

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  7. Explain the nature of the graphs of log P versus log V and log V versu...

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  8. Write the units of Vander Waals constants a and b.

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  9. Why is the enthalphy change for a chemical reaction more important tha...

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  10. What is meant by isolated system?

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  11. Find out the heat of formation of CH3COOH. Given that the heat of comb...

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  12. Balance by ion electron method : Zn + NaNO3 rarr Na2ZnO2 + NH3 + H2O

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  13. Give an example of a compound where the constituent element exhibit fr...

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  14. Although KHF2 is a stable compound, KHBr2 does not exist Explain why.

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  15. What happens when H2O2 is mixed with cold acidic potassium dichromate ...

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  16. Why is LiCl soluble in organic solvent?

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  17. Why are fumes seen when barium halides are kept in open air?

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  18. Alkali metals become opaque when they are kept open in air Why?

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  19. Write the basic principles of Solvey process.

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  20. Arrange the following compounds with ascending order of boiling point ...

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