Answer
a. $C_2H_6$ boils at $-89 \space ^o C$
b. $C_2H_6$ burns vigorously in air.
c. $NaBr$ is a solid at 250 $^o C$
d. $NaBr$ dissolves in water.
Work Step by Step
$C_2H_6$ is an organic compound, and $NaBr$ is an inorganic one. Thus, we can relate the common organic characteristics to ethane, and the common inorganic characteristics to sodium bromine.
See Table 12.1, page 445