Quiz 1
Which molecule is the most hydrophobic: a. Butanol b. Propanol c. Ethanol d. Methanol
a
Which of the following statement about hydrogen bond in water is not true: a. Hydrogen bond is short and strong, comparable to a covalent bond. b. Hydrogen bonds in liquid water are transient and flickering as water molecules rotate, bend and reorient themselves. c. One water molecule can form up to four hydrogen bonds. d. Water molecule can serve as either a hydrogen donor or a hydrogen acceptor.
a
Which one of the following molecules can NOT diffuse freely through a bilayer membrane? a. Na+ b. N2 c. CO2 d. O2
a
Which one of the following statements about hydrophobic effect in true: a. Hydrophobic interaction is due to the clustering of hydrophobic molecules in aqueous solution to minimize entropic penalty. b. Hydrophobic interaction comes from favorable charge-charge interaction between molecules. c. Hydrophobic interaction is a real, strong and favorable interaction between hydrophobic molecules.
a
Which of the following statement is not true about water: a. Water has high surface tension. b. Ice is less dense than liquid water. c. Water has high melting point. d. Water can only form hydrogen bond with other water molecules.
d
What would be the pH of 1L of water after addition of 10 uL of 1M NaOH: a. 5 b. 9 c. 10 d. 8
b
Which of the following statement about water molecule is not true: a. One water molecule contains two covalent bonds and two lone pair of electrons. b. The hydrogen atom in a water molecule is more electronegative than the oxygen atom. c. Water is a polar molecule. d. The oxygen atom in a water molecule is partially negatively charged.
b
Which one of the following can not be considered as an amphipathic molecule: a. Butyric acid b. Hydrochloric acid c. Butanol d. Detergent
b
Which one of the following statement is true: a. Nonpolar molecules can form hydrogen bonds with water molecules. b. Clustering of nonpolar molecules in water is thermodynamically unfavorable. c. Water molecules form ordered cage around nonpolar molecules. d. Solvation of nonpolar molecules is thermodynamically favorable.
c