Which of the following statements is true ?

Options

A. van der Waals' strain in cis-1, 2-dimethylcyclopropane is the pricipal reason for its decreased stability relative to the trans isomer
B. Cycohexane gives off more heat per `CH_(2)` group on being burned in air than any other cycloalkane
C. The principal source of strain in the both conformation of cyclohexane is angle atrain
D. The principal source of strain in the gauche conformation of butane is torsional strain

Answer

a

Explanation

van der Wall's strain is known as strain or repulsion between van der Wall's radius of 2-groups in a molecule.