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Account for the following: C and Si sh...

Account for the following:
C and Si show tetravalency in most of their compounds but Ge, Sn and Pb show bivalency.

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ICSE-SOME P-BLOCK ELEMENTS -NCERT TEXTBOOK EXERCISES (With Hints and Solutions)
  1. Account for the following: C and Si show tetravalency in most of the...

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  2. Discuss the pattern of variation in the oxidation states of (i) B to T...

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  3. Explain, why is the +2 oxidation state of lead more stable than the +2...

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  4. How can you explain higher stability of BCl(3) as compared to TlCl(3) ...

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  5. Why does boron triflouride behave as a Lewis acid ?

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  6. Consider the compounds, BCl(3)" and "C"C"l(4). How will they behave wi...

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  7. Is boric acid a protic acid ? Explain.

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  8. Explain what happens when boric acid is heated .

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  9. Describe the shapes of BF(3)" and "BH(4)^(-). Assign the hybridisation...

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  10. Write reactions to justify amphoteric nature of aluminium.

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  11. What are electron deficient compounds ? Are BCl(3)" and "SiCl(4) elect...

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  12. Write the resonance structures of CO(3)^(2-)" and "HCO(3)^(-).

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  13. What is the state of hybridisation of carbon in (a) CO(3)^(2-) (b) dia...

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  14. What is the state of hybridisation of carbon in (a) CO(3)^(2-) (b) dia...

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  15. What is the state of hybridisation of carbon in (a) CO(3)^(2-) (b) dia...

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  16. Explain the difference in properties of diamond and graphite on the ba...

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  17. Rationalise the given statements and give chemical reactions : • Lead(...

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  18. Rationalise the given statements and give chemical reactions : • Lead(...

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  19. Rationalise the given statements and give chemical reactions : • Lead(...

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  20. Suggest reasons why the B–F bond lengths in BF(3) (130 pm) and BF(4 )^...

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  21. If B–Cl bond has a dipole moment, explain why BCl(3) molecule has zer...

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