Q 11 :

‘A’ and ‘B’ formed in the following set of reactions are:              [2023]

Q 12 :

Compound A, ${\mathrm{C}}_5{\mathrm{H}}_{10}{\mathrm{O}}_5$, given a tetraacetate with ${\mathrm{Ac}}_2\mathrm{O}$ and oxidation of A with ${\mathrm{Br}}_2-{\mathrm{H}}_2\mathrm{O}$ gives an acid, ${\mathrm{C}}_5{\mathrm{H}}_{10}{\mathrm{O}}_6$. Reduction of A with HI gives isopentane. The possible structure of A is:                    [2023]

Q 13 :

Decreasing order of dehydration of the following alcohols is        [2023]

• a > d > b > c

   

• d > b > c > a

   

• b > a > d > c

   

• b > d > c > a

   

Q 14 :

A solution of ${\mathrm{CrO}}_5$ in amyl alcohol has a ______ colour.            [2023]

• Yellow

   

• Orange-Red

   

• Green

   

• Blue

   

Q 15 :

In the following reaction, ‘B’ is                        [2023]

Q 16 :

The strongest acid from the following is                  [2023]

Q 17 :

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Butan-1-ol has higher boiling point than ethoxyethane.

Reason R: Extensive hydrogen bonding leads to stronger association of molecules.

In the light of the above statements, choose the correct answer from the options given below:        [2023]

• Both A and R are true but R is not the correct explanation of A

   

• A is false but R is true

   

• Both A and R are true and R is the correct explanation of A

   

• A is true but R is false

   

Q 18 :

Incorrect method of preparation for alcohols from the following is:                [2023]

• Reaction of ketone with RMgBr followed by hydrolysis

   

• Reaction of alkyl halide with aqueous NaOH.

   

• Ozonolysis of alkene.

   

• Hydroboration–oxidation of alkene.

   

Q 19 :

Product [X] formed in the above reaction is:             [2023]

• 

   

• 

   

• ${\mathrm{H}}_3\mathrm{C}—{\mathrm{CH}}_2—\mathrm{CH}={\mathrm{CH}}_2$

   

• ${\mathrm{H}}_3\mathrm{C}—\mathrm{CH}=\mathrm{CH}—{\mathrm{CH}}_3$

   

Q 20 :

In the reaction given below:

'B' is:                                                 [2023]