The species among the following that is not an electrophile is:
1.
2.
3.
4.
The IUPAC name of the above-mentioned compound is:
1. cis-2-Chloro-3-iodo-2-pentene
2. trans-2-Chloro-3-iodo-2-pentene
3. cis-3-Iodo-4-chloro-3-pentene
4. trans-3-Iodo-4-chloro-3-pentene
The IUPAC name of CH3CH=CHC≡CH is:
1. Pent - 3 - en - 1 - yne
2. Pent - 2 - en - 4 - yne
3. Pent - 1 - yn - 3 - ene
4. Pent - 4 - yn - 2 – ene
Which of the following conformers for ethylene glycol is most stable?
I | II |
(a) | \(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C}}-\mathrm{CH}_2-\mathrm{CH}_3 \) |
(b) | \(\left(\mathrm{CH}_3\right)_3 \stackrel{\oplus}{\mathrm{C}} \) |
(c) | \(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C}}\mathrm{H} \) |
(d) | \( \text {CH}_3 \stackrel{\oplus}{\mathrm{C}}\mathrm{H}_2\) |
(e) | \( \stackrel{\oplus}{\mathrm{C}}\mathrm{H}_3 \) |
1. | e < d < c < a < b | 2. | d < e < c < a < b |
3. | a < e < d < c < b | 4. | e < d < c < b < a |
1. | sp2 | 2. | spd2 |
3. | sp2d | 4. | sp3 |
1. | 2. | ||
3. | 4. |
\(\mathrm{CH_3-CH_3, \ CH_3-CH_2-CH_3, \ }\)
\(\mathrm{\left(CH_3\right)_2 CH-CH_3, }\) and \(\mathrm{CH_3-CH_2-CH\left(CH_3\right)_2 }\)
The increasing order of stability of the free radicals formed from homolytic fission of the above three alkanes is:
1. | \(\mathrm{ (CH_3)_2 \dot{C}-CH_2 CH_3<CH_3-\dot{C} H-CH_3 \\ <CH_3-\dot{C} H_2<(CH_3)_3 \dot{C} }\) |
2. | \( \mathrm{CH_3-\dot{C} H_2<CH_3-\dot{C} H-CH_3 \\ <\left(CH_3\right)_2 \dot{C}-CH_2 CH_3<\left(CH_3\right)_3 \dot{C}}\) |
3. | \(\mathrm{CH_3-\dot{C} H_2<CH_3-\dot{C} H-CH_3\\ <\left(CH_3\right)_3 \dot{C}<\left(CH_3\right)_2 \dot{C}-CH_2 CH_3 }\) |
4. | \(\mathrm{ \left(CH_3\right)_3 \dot{C}<\left(CH_3\right)_2 \dot{C}-CH_2-CH_3 \\ <CH_3-\dot{C} H-CH_3<CH_3-\dot{C} H_2 }\) |