Reference no: EM1381537
Question1. The fact that some pure solutions of hydrocarbons do not readily evaporate at room temperature is a result of- Select one:
a. London dispersion forces.
b. The hydrophobic effect.
c. Extensive hydrogen bonding.
d. The existence of a permanent dipoles.
e. All of the answers are correct.
Question2. The bonding geometry of C,O,N is determined by- Select one:
a. The number of electrons in their outer energy level
b. SP3 hybridization of orbitals in the valence shell
c. The number of double-or triple- bonds they make with other atoms in the molecule
d. All of the above
Question3. The greatest buffering capacity of weak acids is when- Select one:
a. They are almost completely dissociated
b. They are almost completely undissociated
c. They are nearly half dissociated
d. The ratio between [A-] and [HA] is very high
e. None of the answers is correct
Question4. The dominant bonds holding together non-polar compounds that are immersed in aqueous solution are _________, and the forces that hold pure solutions of non-polar compounds are ____________. Select one:
a. hydrogen bonds;dispersion
b. hydrogen bonds;hydrophobic
c. hydrophobic;dispersion
d. hydrophobic;hydrogen bonds
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