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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
(iii) Ethyne molecule is linear.

Chemistry - Exemplar Problems

Chapter 4. Chemical bonding and molecular structure


PURE COVALENT bond are not directional but covalent molecule made of diff. element are directional. 
          2. O in water has2 lone pair electron which repeal the bonded pair e of O-H 
bond ,asa result water molecule bend but in carbon di oxide this type of lone pair absent in central atom carbon. 
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