Which are not hydrophilic? A) Cl-ions B) CH3-groups C) -O-H groups D) NH4 + ions
ID: 843493 • Letter: W
Question
Which are not hydrophilic?
A) Cl-ions
B) CH3-groups
C) -O-H groups
D) NH4+ ions
CH3CH2OH, ethanol, and water are miscible in all proportions because __________.
A) they can freely disperse in one another
B) they contain OH
groups
C) their attractions are similar
D) all of the above
Which example demonstrates a net decrease in dispersion (becomes less dispersed or decreases in disorder/entropy)?
A) adding cream to hot coffee
B) assembling a 1000piece
jigsaw puzzle
C) melting an ice cube
D) ripping a finished jigsaw puzzle into a thousand pieces
Explanation / Answer
1. B
2.D
3.B