30. A hydrogen bond is usually depicted by a dashed or dotted line. Circle the p

Question

30. A hydrogen bond is usually depicted by a dashed or dotted line. Circle the picture that correctly represents an H-bonding interaction. HuH Hu HH-C-H H-CHH HC-HH c-H H-f-H orH H-C-H H-c-H H-c-H H H-C-H 31. Describe what is wrong with each of the other three pictures in the previous question. Use bond-line structures to show one water molecule participating in H-bonding with one molecule of 2- pentanone. Place the 84/8-symbols near each atom to indicate the polarity of the bonds. Put squares around the nonpolar region. 32.

Explanation / Answer

To form a hydrogen bond, there should be a polar bond. Oxygen is more polar than hydrogen(H) so these two hydrogen atoms only makes hydrogen bond with other hydrogen and oxygen atoms.

In the given all the 4 structures, B is most appropriate than the remaining. The electronegativity difference between C and H is small so it is very difficult to form a hydrogen bond connected to carbon and oxygen and also other hydrogen connected to an other carbon.

Electronegativity difference between two hydrogens is zero so they don't form hydrogen bonding. So A, C, D are ruled out. The perfect answer is only B.

I think u got the answer for both the questions.

Thanks and good luck.

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