Q 21 :

In the above reaction, left hand side and right hand side rings are named as ‘A’ and ‘B’ respectively. They undergo ring expansion. The correct statement for this process is:     [2023]

• Ring expansion can go upto seven membered rings

   

• Only A will become 6 membered.

   

• Finally both rings will become five membered each

   

• Finally both rings will become six membered each

   

Q 22 :

For the given reaction:

The total number of possible products formed by tertiary carbocation of A is ________.          [2023]

Q 23 :

Match List - I with List - II.                     [2025]

Choose the correct answer from the options given below:           

• (A)–(IV), (B)–(III), (C)–(I), (D)–(II)

   

• (A)–(II), (B)–(III), (C)–(I), (D)–(IV)

   

• (A)–(IV), (B)–(III), (C)–(II), (D)–(I)

   

• (A)–(III), (B)–(IV), (C)–(II), (D)–(I)

   

Q 24 :

The reactions which produce alcohol as the product are:

A. ${\mathrm{CH}}_4+{\mathrm{O}}_2\underset{\mathrm{\Delta }}{\overset{{\mathrm{Mo}}_2{\mathrm{O}}_3}{\to }}$

B. $2{\mathrm{CH}}_3{\mathrm{CH}}_3+3{\mathrm{O}}_2\underset{\mathrm{\Delta }}{\overset{({\mathrm{CH}}_3\mathrm{COO}{)}_2\mathrm{Mn}}{\to }}$

C. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{CH}\stackrel{{\mathrm{KMnO}}_4}{\to }$

D. $2{\mathrm{CH}}_4+{\mathrm{O}}_2\stackrel{Cu/523 \mathrm{K}/100 \mathrm{atm}}{\to }$

E. ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{C}{\mathrm{H}}_3\stackrel{{\mathrm{KMnO}}_4/{\mathrm{H}}^{+}}{\to }$

Choose the correct  answer from the options given below: [2026]

• C and D Only

   

• B, D and E Only

   

• A and D Only

   

• A, C and E Only

   

Q 25 :

From the following, how many compounds contain at least one secondary alcohol?

Choose the correct answer from the options given below:                 [2026]

• Two

   

• Five

   

• Three

   

• Four