Question

Question 12 Which of the following statements is false about CH3CH2CH3 and CH3CH2OH? Your answer: O Hydrogen bonding is the only type of intermolecular forces between CH3CH2OH molecules. O (C) atom makes sp hybridization in CH3CH2CH3 molecule. o Only dispersion forces exist between CH3CH2CH3 molecules. OCH3CH2OH has stronger intermolecular forces than CH3CH2CH3. O CH3CH2CH3 molecule has tetrahedral geometry. Clear answer Back Next

Answer 1

Opt a : Hydrogen bonding exists between two molecules of ethanol. However due to unsymmetrical distrubution of electron density , polarity is developed resulting in net dipole moment. So dipole- dipole forces also exist. Like all other molecules dispersion forces also exists. Therefore, hydrogen bonding is not the only type of force b/w two ethanol molecules. So opt a is false.

Opt b: yes all the carbon atoms in propane are sp³ hybridized at an angle of 109.5

Opt c: Dispersion force is the loosely vander waals force b/w two atoms and molecules. Between two propane molecules this is the only force present and can be easily overcome.

Opt d: Ethanol has intermolecular hydrogen bonding and propane has dispersion forces. So ethanol has strong intermolecular forces than propane.

Opt e: Propane has tetrahedral geometry as carbon is sp³ hybridization.