The correct order of decreasing stability of the following carbocations is:
I | \( \begin{aligned} &~~~~~~~~~~~~\oplus\\ & CH_3 - CH-CH_3 \end{aligned}\) |
II | \( \begin{aligned} &~~~~~~~~~~~~\oplus\\ & CH_3 - CH-OCH_3\end{aligned}\) |
III | \( \begin{aligned} & ~~~~~~~~~~~~\oplus\\ &CH_3 - CH-CH_2- OCH_3\end{aligned}\) |
1. | II > I > III | 2. | I > II > III |
3. | II < I < III | 4. | I < II < III |
Which of the following carbon marked with asterisk is expected to have greatest positive charge?
1. | 2. | ||
3. | 4. |
Which carboxylate ion among the following is the most stable?
1. | ![]() |
2. | ![]() |
3. | ![]() |
4. | ![]() |
Match the ions given in Column I with their nature given in Column II.
Column I (Ions) |
Column II (Corresponding nature) |
||
A. | ![]() |
I. | Stable due to resonance |
B. | ![]() |
II. | Destabilised due to inductive effect |
C. | ![]() |
III. | Stabilised by hyperconjugation |
D. | ![]() |
IV. | A secondary carbocation |
Codes:
Options: | A | B | C | D |
1. | I,II | II | II | III,IV |
2. | I | II,IV | III | IV |
3. | I | IV | III | II |
4. | IV | I | III | II |
Arrange the following carbanions in order of their decreasing stability:
A. \(\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}^{-}\)
B. \(\mathrm{H}-\mathrm{C} \equiv \mathrm{C}^{-}\)
C. \(\mathrm{H}_3 \mathrm{C}-\mathrm{{C}H_2^-}\)
1. | A > B > C | 2. | B > A > C |
3. | C > B > A | 4. | C > A > B |
a. | Electrons of carbon-hydrogen \(\sigma \text -\) bond of an alkyl group directly attached to an atom of unsaturated system. |
b. | Electrons of carbon-hydrogen \(\sigma \text -\) bond of alkyl group directly attached to the positively charged carbon atom. |
c. | \(\pi \text -\) electrons of carbon-carbon bond. |
d. | Lone pair of electrons. |
Choose the correct option:
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, c) |