How many of the following compounds contains higher $\mathrm{C}-\mathrm{H}$ bond energy than $\mathrm{C}-\mathrm{H}$ bond in cychlohexane?

 

How many $1,2$-shifts are involved during the course of following reaction:

How many following carbocation undergo re-arrangement-

(a) ${\mathrm{CH}}_3{\mathrm{CH}}_2{{\mathrm{CH}}_2}^{+}$

(b) ${\left({\mathrm{CH}}_3\right)}_2\mathrm{CH}\stackrel{+}{\mathrm{CH}}{\mathrm{CH}}_3$

(c) ${\left({\mathrm{CH}}_3\right)}_3\mathrm{C}\stackrel{+}{\mathrm{CH}}{\mathrm{CH}}_3$

(d) ${\left({\mathrm{CH}}_3{\mathrm{CH}}_2\right)}_3{{\mathrm{CCH}}_2}^{+}$

(e) 

(f) 

(g) 

(h)  

Which is a stronger acid, $\mathrm{A}$ or $\mathrm{B}$ and why ?

Which is a stronger acid, $\mathrm{A}$ or $\mathrm{B}$ and why ?