KVPY PROBLEMS (PREVIOUS YEARS)

In the reaction.

Glucose yeast $\to \times \dots {\mathrm{KMnO}}_4⟶\mathrm{Y}$ the products $\mathrm{X}$ and $\mathrm{Y}$, respectively, are

The major product of the reaction of $2$ -butene with alkaline ${\mathrm{KMnO}}_4$ solution is

Upon heating with acidic ${\mathrm{KMnO}}_4$, an organic compound produces hexan-$1,6$-dioic acid as the major product. The starting compound is

The major product of the following reaction

 is