Q 1 :

Number of alkanes obtained on electrolysis of a mixture of ${\mathrm{CH}}_3\mathrm{COONa}$ and ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{COONa}$ is _________ .                  [2024]

Q 2 :

The incorrect statement regarding conformations of ethane is:                          [2024]

• Ethane has infinite number of conformations.

   

• The dihedral angle in staggered conformation is 60°.

   

• Eclipsed conformation is the most stable conformation.

   

• The conformations of ethane are inter-convertible to one-another.

   

Q 3 :

3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for ‘A’ is ______.           [2024]

Q 4 :

When sec-butylcyclohexane reacts with bromine in the presence of sunlight, the major product is :                [2025]

Q 5 :

The maximum number of RBr producing 2-methylbutane by above sequence of reactions is ______. (Consider the structural isomers only)       [2025]

• 4

   

• 1

   

• 3

   

• 5

   

Q 6 :

Propane molecule on chlorination under photochemical condition gives two di-chloro products, “x” and “y”. Amongst “x” and “y”, “x” is an optically active molecule. How many tri-chloro products (consider only structural isomers) will be obtained from “x” when it is further treated with chlorine under the photochemical condition.        [2025]

• 3

   

• 2

   

• 5

   

• 4

   

Q 7 :

Which of the following conformations will be the most stable?             [2023]

• [IMAGE 68]

   

• [IMAGE 69]

   

• [IMAGE 70]

   

• [IMAGE 71]

   

Q 8 :

All structures given below are of vitamin C. Most stable of them is:                    [2023]

• [IMAGE 72]

   

• [IMAGE 73]

   

• [IMAGE 74]

   

• [IMAGE 75]

   

Q 9 :

[IMAGE 77]

The correct sequence of reagents for the preparation of Q and R is:           [2023]

• $\text{(i) C}{\mathrm{r}}_2{\mathrm{O}}_3,770\mathrm{K},20\mathrm{atm}; \text{(ii) C}{\mathrm{rO}}_2{\mathrm{Cl}}_2,{\mathrm{H}}_3{\mathrm{O}}^{+}; \text{(iii) N}\mathrm{aOH}; \text{(iv) }{\mathrm{H}}_3{\mathrm{O}}^{+}$

   

• $\text{(i) M}{\mathrm{o}}_2{\mathrm{O}}_3,\mathrm{\Delta }; \text{(ii) C}{\mathrm{rO}}_2{\mathrm{Cl}}_2,{\mathrm{H}}_3{\mathrm{O}}^{+}; \text{(iii) N}\mathrm{aOH}; {\text{(iv) H}}_3{\mathrm{O}}^{+}$

   

• $\text{(i) C}{\mathrm{rO}}_2{\mathrm{Cl}}_2,{\mathrm{H}}_3{\mathrm{O}}^{+}; \text{(ii) C}{\mathrm{r}}_2{\mathrm{O}}_3,770\mathrm{K}, 20\mathrm{atm}; \text{(iii) N}\mathrm{aOH}; {\text{(iv) H}}_3{\mathrm{O}}^{+}$

   

• $\text{(i) K}{\mathrm{MnO}}_4,{\mathrm{OH}}^{-}; \text{(ii) M}{\mathrm{o}}_2{\mathrm{O}}_3,\mathrm{\Delta }; \text{(iii) N}\mathrm{aOH}; {\text{(iv) H}}_3{\mathrm{O}}^{+}$

   

Q 10 :

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

[IMAGE 79]

• ${\text{Cl–CH}}_2–{({\mathrm{CH}}_2\mathrm{)}}_4–{\text{CH}}_2\text{–Cl}$

   

• [IMAGE 80]

   

• [IMAGE 81]

   

• ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_4{\mathrm{CH}}_2\mathrm{Cl}$