Which of the Following Best Describes the Experimental Conditions Under

Multiple Choice

Which of the following best describes the experimental conditions under which an alkane can be chlorinated or brominated?

A) in the dark at room temperature
B) only at room temperature upon exposure to light
C) only in the dark at temperatures exceeding about 100°C
D) either at room temperature upon exposure to light or in the dark at temperatures exceeding about 100°C