An aromatic compound ‘X’ with molecular formula C8H10 on nitration gives one mononitro derivative and three dinitro derivatives. Compound ‘X’ would be

In the following figure, A, B, C and D are the given options. Out of which only p- Xylene on nitration gives one possibility (1 and 2) of mono nitro derivative product. 1 and 2 are identical to each other i.e. same molecule. Also, p- Xylene on nitration gives three possibilities (1, 2, 3, 4, 5 and 6) of di- nitro derivative products. Where, 1 and 2 are identical to each other i.e. same molecule. 3 and 4 are identical to each other i.e. same molecule. 5 and 6 are identical to each other i.e. same molecule. HYDROCARBONS 45