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Although geometries of NH(3) and H(2)O m...

Although geometries of `NH_(3)` and `H_(2)O` molecules are distorted tetrahedral, bond angle in water is less than that of ammonia. Discuss.

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In ` NH_(3)`, there is only one lone pair on N-atom to repel the bond pairs whereas in ` H_(2)O` , there are two lone
pairs on O-atom to repel the bond paris . Hence the repulsions on bond pairs are greater in ` H_(2) O ` than in
` NH_(3)` and hence the bond angle is less.
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The H-O-H bond angle in water is

Bond angle in H_(2)O is

Assertion (A): Though the central atom of both NH_(3) and H_(2)O molecules are sp^(3) hybridised, yet H-N-H bond angle is greater thant that of H-O-H. Reason(R): This is because nitrogen atom has one lone pair and oxygen atom has two lone pairs.

Why is the bond angle of water less than the bond angle of CH_(4) ?

Arrange H_(2)O,NH_(3) and CH_(4) molecules in decreasing order of bond angle.

PRADEEP-CHEMICAL BONDING AND MOLECULAR STRUCTURE-NCERT Questions And Exercises With Answers
  1. Write the favourable factors for the formation of ionic bond.

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  2. Discuss the shape of the following molecules using the VSEPR model: ...

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  3. Although geometries of NH(3) and H(2)O molecules are distorted tetrahe...

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  4. How do you express the bond strength in terms of bond order?

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  5. Define the bond length.

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  6. Explain the important aspects of resonance with reference to the CO(3)...

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  7. H(3) PO(3) can be represented by the structures 1 and 2 shown below . ...

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  8. Write the resonance structures for SO(3),NO(2), and NO(3)^(ө).

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  9. Use Lewis symbols to show electron transfer between the following atom...

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  10. Although both CO(2) and H(2)O are triatomic molecules, the shape of H(...

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  11. Write the significance/applications of dipole moment.

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  12. Define electronegativity. How does it differ from electron gain enthal...

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  13. Explain with the help of suitable example polar covalent bond.

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  14. Arrange the following molecules in order ionic character of their bond...

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  15. The skeletal structure of CH(3) COOH as shown below is correct , but...

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  16. Apart from tetrahedral geometry, another possible geometry for CH(4) ...

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  17. Explain why BeH(2) molecule has a zero dipole moment although the Be-H...

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  18. Which out of NH(3) and NF(3) has higher dipole ment and why ?

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  19. What is meant by hybridisation of atomic orbitals? Describe the shape ...

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  20. What is the change in hybridization (if any) of the Al atom in the fol...

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