Solution: The first organic compound to be synthesized in the laboratory was urea, by the German chemist Friedrich Wohler in 1828. He synthesized urea by heating ammonium cyanate, an inorganic compound, which rearranged to form urea: \[ \text{NH}_4\text{OCN} \rightarrow \text{NH}_2\text{CONH}_2 \] This experiment disproved the belief that organic compounds could only be formed in living organisms, marking the beginning of modern organic chemistry.
The correct option is (B): urea
Arrange the following set of carbocations in order of decreasing stability.

Choose the correct answer from the options given below:
What is meant by functional group in carbon compounds? Write in tabular form the structural formula and the functional group present in the following compounds:
(a) Ethanol
(b) Ethanoic acid