Curved arrows are used in Organic Chemistry to show the movement of electrons in the mechanism of a reaction. The correct product of the following reaction is

The correct order of the rate of $ESR$ (Electrophilic Substitution Reaction) in the given compounds is:

In which of the following reactions is a carbanion $NOT$ formed as an intermediate?

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:

Which of the following orders is correct?

In an organic reaction,explain the reactant,substrate,and products obtained. What is the mechanism of the reaction?