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Hydrogen bonding is strongest in...

Hydrogen bonding is strongest in

A

O-H......S

B

S-H.......O

C

F-H.....F

D

F-H.......O

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The correct Answer is:
C
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The hydrogen bond is strongest in

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

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NIKITA PUBLICATION-P-BLOCK ELEMENT -Competitive Exam
  1. Hydrogen bonding is strongest in

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  2. In which of the following arrangements, the sequence is not strictly a...

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  3. Each of the following is true for white and red phosphorus except that...

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  4. Which of the following is not known

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  5. Which one of the following elements is most metallic?

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  6. Which of the following oxides of nitrogen is the anhydride of HNO(3)?

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  7. Dissociatuion of H(3)PO(4) occurs in following stages

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  8. Nitrogen forms how many oxides

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  9. The element which catches fire in air at 30^@C and is stored under wat...

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  10. A solution of ammonia in water contains

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  11. Which of the following is oxidised in air?

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  12. Which of the following exist in polymeric form ?

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  13. Which nitrogen trihalides is least basic

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  14. Which of the following oxide of nitrogen is a coloured gas?

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  15. Which oxide does not act as a reducing agent?

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  16. The basic character of hydrides of the 15th-group elements decreases i...

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  17. The strongest base is

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  18. Which has the lowest boiling point?

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  19. Of the following, the most acidic is

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  20. The correct order of the acidic nature of oxides is in the order

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  21. Nitrogen is relatively inactive element because is atom has a stable e...

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