Decreasing order of stability of following carbocations is :-

(A) $\mathrm{m}-{\mathrm{CH}}_3\mathrm{O}-{\mathrm{C}}_6{\mathrm{H}}_4-{\mathrm{CH}}_2^{+}$

(B) $\mathrm{p}-{\mathrm{CH}}_3\mathrm{O}-{\mathrm{C}}_6{\mathrm{H}}_4-{\mathrm{CH}}_2^{+}$

(C) ${\mathrm{C}}_6{\mathrm{H}}_5-{\mathrm{CH}}_2^{+}$

(D) $\mathrm{p}-{\mathrm{NO}}_2-{\mathrm{C}}_6{\mathrm{H}}_4-{\mathrm{CH}}_2^{+}$

Consider the following compounds

Hyperconjugation occurs In :-

Which of the given compounds can exhibit tautomerism?

Which of the following statements is NOT CORRECT for a nucleophile?

The correct order of ${\mathrm{pK}}_{\mathrm{a}}$ is

(i) ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{OH}$

(ii) ${\mathrm{H}}_3\mathrm{C}-\underset{\stackrel{|}{{\mathrm{CH}}_3}}{\mathrm{CH}}-\mathrm{OH}$

(iii) ${\mathrm{H}}_3\mathrm{C}-\underset{\stackrel{|}{{\mathrm{CH}}_3}}{\overset{\underset{|}{{\mathrm{CH}}_3}}{\mathrm{C}}}-\mathrm{OH}$