The given reaction is a pinacol-pinacolone rearrangement. Which of the following is not correct about the product formed?

Which of the following statements is $NOT$ correct for heterolysis?

Identify the mechanism of the following reaction:

In the following reaction,compound $Q$ is obtained from compound $P$ via an ionic intermediate. What is the degree of unsaturation of $Q$?

In the above reaction,the electrophile is substituted at the meta position only,due to:
$I$. Electron density is more at ortho $\&$ para positions
$II$. Electron density is relatively less at ortho $\&$ para positions
$III$. Electron density is less at meta position
$IV$. Electron density is relatively more at meta position
The correct answer is:

Among the given compounds,the correct order of enol content is:
$(I)$ Cyclopentanone
$(II)$ $4$-hydroxycyclopent-$2$-en-$1$-one derivative
$(III)$ $\gamma$-butyrolactone derivative