Passage II

Hydrocarbons contain carbon (C) and hydrogen (H) atoms joined by chemical bonds (which are represented in chemical notation by short straight lines). The carbon atoms are bonded to each other to form linear, branched, or cyclic structures (examples are presented in Table 1). The boiling points of these hydrocarbons were measured and listed in Table 2, and their densities (ratio of mass to volume) are listed in Table 3.

7. According to Table 2, by approximately how many degrees does the boiling point of a linear hydrocarbon differ from that of a branched hydrocarbon with the same number of carbon atoms ?

Answer and Explanation

Your Answer is

Correct Answer is B

Explanation

Look at table 2, take 4 C atoms as an example, the boiling point of linear is 0°C, the boiling point of branched is 12°C, the difference is 12°C, the 10°C of option B is the closest