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The hydrogen bond is strongest in...

The hydrogen bond is strongest in

A

S-H.. O

B

O-H... S

C

F- H...F

D

O- H. N

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The correct Answer is:
C
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It is a common observation that many compounds containing hydrogen attached to highly electronegative elements such as oxygen, nitrogen, or fluorine, often exhibit unexpected properties, such as relatively high melting points, boiling points, viscosity, solubility in water etc Such an unexpected behaviour can be explained on the basis of hydrogen bonding. When a hydrogen atom is attached to a highly electronegative element of small size such as F. N, 0. etc. the electronegative atoms strongly attracts the shared pair of electrons towards it self. As a result, the hydrogen atom becomes slightly positive and the electronegative element becomes slightly negative when two molecules of such a substance say HF come close to each other, the negatively charged fluorine atom of one molecule attracts the positively charged hydrogen atom of the other molecule. A hydrogen atom, thus links to highly electronegative atoms, one by a strong covalent bond and the other by weak electrostatic attraction as shown ahead overset(delta+)H-overset(delta-)F....overset(delta+)H-overset(delta-)F , the dotted line represents a hydrogen bond. Hydrogen bond is strongest in

DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-REVISION
  1. Which of the following molecule is linear?

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  2. Which of the following is correct ?

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  3. The hydrogen bond is strongest in

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  4. Match list and list II and pick out correct matching from the given ch...

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  5. The sequence that correctly describes the relative bond strengths pert...

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  6. Consider the following molecules or ions CH2Cl2 (ii) NH4^+ (iii) SO...

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  7. The decreasing order of the boiling points of the following hydrides ...

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  8. Match list and list II and pick out correct matching from the given ch...

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  9. The energy of hydrogen bond is of the order of

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  10. The number of lone pairs of electrons present on the central atom of C...

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  11. Bond order of nitric oxide is

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  12. How many types of F-S-F bonds are present in SF4?

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  13. The number of sigma and pi- bonds in allyl isocyanide are

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  14. In TeCl4, the central tellurium involves the hybridization

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  15. Match the compounds in the List with that in List II {:("List I","Li...

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  16. The correct order of bond order values among the following (i) NO^(...

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  17. The bond lengths and bond angles in the molecules of methane, ammonia,...

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  18. Which one of the following pairs consists of only paramagnetic species

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  19. The hybridization of oxygen atom in H2O2 is

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  20. Which of the following is paramagnetic with bond order 0.5?

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