Suggest the most important type of intermolecular attractive interacti

1.	Suggest the most important type of intermolecular attractive interaction in the following pairs.(i) n-hexane and n-octane (ii) I2 and CCl4 (iii) NaClO4 and water (iv) methanol and acetone (v) acetonitrile (CH3CN) and acetone (C3H6O).
Answer» (i) Both are non-polar. Hence, inter molecular interactions in them will be London/ dispersion forces. (ii) Both are non-polar. Hence, inter molecular interactions in them will be London/ dispersion forces. (iii) NaClO4 gives Na+ and ClO4 - ions in the solution while water is polar molecule. Hence, intermolecular interactions in them will be ion – dipole interactions. (iv) Both are polar molecules. Hence intermolecular interactions in them will be dipole-dipole interactions. (v) Both are polar molecules. Hence intermolecular interactions in them will be dipole-dipole interactions.

Suggest the most important type of intermolecular attractive interaction in the following pairs.(i) n-hexane and n-octane (ii) I2 and CCl4 (iii) NaClO4 and water (iv) methanol and acetone (v) acetonitrile (CH3CN) and acetone (C3H6O).

Answer»

(i) Both are non-polar. Hence, inter molecular interactions in them will be London/ dispersion forces.

(ii) Both are non-polar. Hence, inter molecular interactions in them will be London/ dispersion forces.

(iii) NaClO4 gives Na+ and ClO4 - ions in the solution while water is polar molecule. Hence, intermolecular interactions in them will be ion – dipole interactions.

(iv) Both are polar molecules. Hence intermolecular interactions in them will be dipole-dipole interactions.

(v) Both are polar molecules. Hence intermolecular interactions in them will be dipole-dipole interactions.

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