The organic compound prepared by Wohler from an inorganic compound called ammonium cyanate was:

47 An alkyne has seventy-five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be: 48 A diamond-toothed saw is usually used for cutting: 50 One of the following is not an allotrope of carbon. This is: 51 The number of carbon atoms in the organic compound named as 2, 2-dimethylpropane is: