Dispersion of White Light by a Glass Prism

By placing the prism in minimum deviation position images of the spectrum:

Mark the incorrect statement:

Two identical prisms $ABC$ and $A\text{'}B\text{'}C\text{'}$ are given. White light is passed through $ABC$ as shown below: Which of the following positions of $\mathrm{A}\text{'}\mathrm{B}\text{'}\mathrm{C}’$ will again yield white light:

A beam of white light falling on a glass prism gets split up into seven colours marked $\mathit{1}$ to $\mathit{7}$ as shown m the diagram.

Which two positions correspond closely to the colour of:  A solution of potassium permanganate? Danger or stop signal lights?

A beam of white light falling on a glass prism gets split up into seven colours marked $\mathit{1}$ to $\mathit{7}$ as shown in the diagram. A student makes the following statements about the spectrum observed on the screen:

The colours at positions marked $\mathit{3}$ and $\mathit{5}$ are similar to the colour of the sky and the core of a hard-boiled egg respectively.
Is the above statement made by the student correct or incorrect? Justify.

Describe an experiment to show that different colours of white light can be recombined to form white light.

Why does dispersion occur only on refraction and not on reflection?