Q43 of 68 Page 44

Arrange the following bonds in order of increasing ionic character giving reason

N—H, F—H, C—H and O—H


To arrange the molecules in the increasing order of ionic character, we have to look at the electronegativity difference.


The ionic character is greater in the molecules that are having the greatest electronegativity difference because the electron pair shifts toward a more electronegative atom increasing the ionic character.


The electronegativity difference order in the molecules is as follows:


C-H<N-H<O-H< F-H


Thus, the ionic character order will be:


C-H<N-H<O-H< F-H


More from this chapter

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41

Give reasons for the following :

(i) Covalent bonds are directional bonds while ionic bonds are nondirectional.


(ii) Water molecule has bent structure whereas carbon dioxide molecule is linear.


(iii) Ethyne molecule is linear.


 42

What is an ionic bond? With two suitable examples explain the difference between an ionic and a covalent bond?

 44

Explain why CO32- ion cannot be represented by a single Lewis structure. How can it be best represented?

 45

Predict the hybridisation of each carbon in the molecule of organic compound given below. Also indicate the total number of sigma and pi bonds in this molecule.