125) In the figure above, which are isomers of compound (1)?
A) All are isomers of compound (1).
B) None are isomers of compound (1).
C) only (2) and (3)
D) only (4)
126) In the figure above, which are branched hydrocarbons?
A) All are branched hydrocarbons.
B) None are branched hydrocarbons.
C) only (1) and (4)
D) only (1), (2), and (4)
127) Which of the compounds shown above is correctly identified by the name pentane according to the
IUPAC system of naming compounds?
A) all
B) none
C) only (2)
D) only (3)
128) Which of the compounds shown above is correctly identified by the name 2-methylbutane?
A) all are 2-methylbutane
B) none
C) only (1)
D) only (1) and (4)