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Arrange the following molecules/ions in ...

Arrange the following molecules/ions in order of decreasing H-N-H bond angle and explain the order.
`NH_(3),NH_(4)^(+),NH_(2)^(-)`.

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`NH_(3)` has one lone paiir and 3 bond pairs, `NH_(4)^(+)` has four bond pairs and `NH_(2)^(-)` has two lone pairs and two bond pairs. According to VSEPR theory since the repulsions follow the order: `lp-lp gt lp-bpgtbp-bp`, the bond angles (N-N-H) decrease in the order:
`NH_(4)^(+) gt NH_(3) gt NH_(2)^(-)`.
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CHHAYA PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-WARM UP EXERCISE
  1. Bond angle in H(2)O is greater than that of H(2)S- explain.

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  2. Arrange the following in order of increasing radii. F, Cl, Br

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  3. Arrange the following molecules/ions in order of decreasing H-N-H bond...

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  4. Write down the main postulates of valence bond theory.

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  5. What do you understand by the term atomic orbital?

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  6. Explain why covalent bonds possess directional property.

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  7. What do you meann by a sigma and pi-bond?

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  8. Why are the pi-bonds weaker and more reactive than the sigma-bonds?

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  9. Arrange (s-s), (s-p) and (p-p) sigma-bonds in order of decreasing bond...

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  10. Explain why the formation of a pi-bond is not possible between a p(y) ...

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  11. Which symmetry element is present in a pi-bond?

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  12. What is meant by hybridisation of atomic orbitals?

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  13. What will be the spatial distribution of (i) sp^(3), (ii) sp^(2) a...

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  14. Is hybridisation possible in an isolated atom?

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  15. The state of hybridisation of the central atom of which of the followi...

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  16. Name the type of hybridisation of the central atom which leads to eaac...

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  17. Identify the state of hybridisation of each carbon in: (i) CH(2)=CH-...

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  18. The four C-H bonds in methane are equivalent though carbon was differe...

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  19. Arrange ehthane, ethylene and acetylene in order of their decreasing C...

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  20. Total number of lone pair of electrons in I(3)^(-) ion is -

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