Pent-$2$-ene is heated with concentrated acidified potassium manganate($\mathrm{VII}$) solution. Draw the displayed formulae of the products and name them. 

Type of hybridisation in ethane molecule is:

(A) only $\mathrm{sp}$                    (B) only ${\mathrm{sp}}^2$                    (C) only ${\mathrm{sp}}^3$    

Enter your correct answer as A, B or C.

Here are three types of hybridisation of carbon atomic orbitals.

(A) only $\mathrm{sp}$                     (B) only ${\mathrm{sp}}^2$                    (C) only ${\mathrm{sp}}^3$

Which of the above do you find in the ethene molecule?

Enter your correct answer as $\mathrm{A}, \mathrm{B}$ or $\mathrm{C}$.

Here are four types of hybridisation of carbon atomic orbitals.

(A) only ${\mathrm{sp}}^2$                         (B) only ${\mathrm{sp}}^3$                          (C) ${\mathrm{sp}}^2$ and ${\mathrm{sp}}^3$

Which do you find in the propene molecule?

Enter your correct answer as A, B or C.

Write the word equation for an example of cracking ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_8{\mathrm{CH}}_3\underset{\mathrm{heat}}{\overset{{\mathrm{Al}}_2{\mathrm{O}}_3}{\to }}{\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_4{\mathrm{CH}}_3+{\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$