Match the ions given in Column I with their nature given in Column II.
| Column I | Column II | ||
|---|---|---|---|
| A. |  |
1. | Stable due to resonance |
| B. | $\mathrm{F}_3-\mathrm{C}^{\oplus}$ | 2. | Destablised due to inductive effect |
| C. |  |
3. | Stabilised by hyperconjugation |
| D. | $\mathrm{CH}_3-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_3$ | 4. | A secondary carbocation |
A - (1, 2), B - (2), C - (2), D - (3, 4)
| Column I | Column II | Explanation | |
|---|---|---|---|
| A. |  |
Stable due to resonance Destabilised due to inductive effect |
|
| B. | $\mathrm{F}_3-\mathrm{C}^{+}$ | Destabilised due to inductive effect | $$-I$$ effect of F creates electron deficiency at carbon $\mathrm{C}^{+}$ |
| C. |  |
Destablised due to inductive effect | + l effect of $\mathrm{CH}_3$ increases electron density at carbon $\mathrm{C}^{-}$ |
| D. | $\mathrm{CH}_3-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_3$ | A secondary carbocation stabilised due to hyperconjugation | $\stackrel{+}{\mathrm{C}} \mathrm{H}$ is attached to two carbon. It can also be stabilised by hyperconjugation. |
Assertion (A) Simple distillation can help in separating a mixture of propan-1-ol (boiling point $97^{\circ} \mathrm{C}$ ) and propanone (boiling point $56^{\circ} \mathrm{C}$ ).
Reason (R) Liquids with a difference of more than 201 CC in their boiling points can be separated by simple distillation.
Assertion (A) Energy of resonance hybrid is equal to the average of energies of all canonical forms.
Reason (R) Resonance hybrid cannot be presented by a single structure.
Assertion (A) Pent-1-ene and pent-2-ene are position isomers.
Reason (R) Position isomers differ in the position of functional group or a substituent.
Assertion (A) All the carbon atoms in $\mathrm{H}_2 \mathrm{C}=\mathrm{C}=\mathrm{CH}_2$ are $s p^2$ - hybridised.
Reason (R) In this molecule all the carbon atoms are attached to each other by double bonds.