Miscellaneous

Which of the following is the correct ranking from the least stable to the most stable?

$\mathrm{I}.$  

$\mathrm{II}.$   

$\mathrm{III}.$   

$\mathrm{IV}.$    

The reaction in which free radicals can be formed by homolytic fission is

$\left(\mathrm{a}\right)$  

$\left(\mathrm{b}\right)$  

$\left(\mathrm{c}\right)$  

What is the correct order of the above rate of reactions?

Which of the following effects of the methoxy group operate on negative charge of the below carbanion?

Consider the following carbocation and identify the incorrect statement.

All effects, namely inductive, mesomeric and hyperconjugation, can be applied in which of the following molecules?

Which of the following statement is incorrect?

Which one of the following does not have an ${\mathrm{sp}}^2$ hybridised carbon?

$\stackrel{\mathrm{A}}{\mathrm{C}}{\mathrm{H}}_3\stackrel{\mathrm{B}}{\mathrm{C}}\mathrm{H}=\mathrm{CH}-\stackrel{\mathrm{C}}{\mathrm{C}}{\mathrm{H}}_2-\stackrel{\mathrm{D}}{\mathrm{C}}{\mathrm{H}}_2-\stackrel{\mathrm{E}}{\mathrm{C}}\mathrm{H}{\left({\mathrm{CH}}_3\right)}_2$

The order of homolytic bond dissociation energy of different $\mathrm{C}-\mathrm{H}$ bonds is:

Which of the following compounds possess $\mathrm{C}-\mathrm{H}$ bond with the lowest bond dissociation energy?

Which of the following intermediate sites have a similar geometry?

$\left(\mathrm{i}\right)$ $\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2{\mathrm{CH}}_3$

$\left(\mathrm{ii}\right)$ $\stackrel{-}{\mathrm{C}}{\mathrm{H}}_2{\mathrm{CH}}_3$

$\left(\mathrm{iii}\right)$ $:\stackrel{-}{\mathrm{C}}{\mathrm{H}}_2{\mathrm{COCH}}_3$

$\left(\mathrm{iv}\right)$ ${\mathrm{CH}}_2=\mathrm{CH}-\stackrel{-}{\mathrm{C}}{\mathrm{H}}_2$

What is the order of stability of the following carbocations?

What is the correct stability order of the following carbanions?

$\left(\mathrm{i}\right) {\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\stackrel{\ominus }{\mathrm{C}}{\mathrm{H}}_2$

$\left(\mathrm{ii}\right) {\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\stackrel{\ominus }{\mathrm{C}}({\mathrm{CH}}_3{)}_2$ 

$\left(\mathrm{iii}\right) {\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\stackrel{\ominus }{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_3$

The most stable anion among the following will be:

Amongst the following, the least basic character is shown by

Which of the following chemical species are not related through resonance?

(a) ${\mathrm{CH}}_3{\mathrm{COCH}}_2{\mathrm{COOC}}_2{\mathrm{H}}_5 \text{and} {\mathrm{CH}}_3\left(\mathrm{OH}\right)={\mathrm{CHCOOC}}_2{\mathrm{H}}_5$

(b)  

(c)  

(d)  

What is the correct order of stability for the following resonating structures?

(A)  

(B)  

(C)  

What is the correct order of the acidic character of hydrogen in the following compounds?

Which of the following is incorrect about the applications of hyperconjugation?

Delocalization of charge occurs in which of the following structures?

(a) 

(b) 

(c) 

(d) 

(e)