Question

16 Ethyne gas may be tested for saturation in the laboratory. Which of these is a positive test?
a. It changes the colour of cobalt chloride paper from blue to pink
b. It changes the colour of bromine water from red to blue
c. It turns lime water milky
d. It decolorizes acidified potassium permanganate solution.

18 Breaking of a larger hydrocarbon molecule into a smaller one by heating in the presence of a catalyst is called ___.
a. Cracking
b. Orthofugation
c. Centrifugation
d. Thermogenation

Answer 1

16. d. It decolorizes acidified potassium permanganate solution.
17. a. Cracking