In the industrial hydrogenation of vegetable oil, a finely divided nickel catalyst is used to increase the rate of reaction. The rate of hydrogenation is directly proportional to the active surface area of the catalyst.
Which of the following catalyst preparations provides the highest rate of reaction?
8.5×10−3 m28.5 \times 10^{-3}\text{ m}^28.5×10−3 m2
7.5×101 cm27.5 \times 10^1\text{ cm}^27.5×101 cm2
6.0×103 mm26.0 \times 10^3\text{ mm}^26.0×103 mm2
5.0×10−1 dm25.0 \times 10^{-1}\text{ dm}^25.0×10−1 dm2