Q. No.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. \(\mathrm{H}_3 \mathrm{C}-\mathrm{\bar{C}H_2}\)
1. A>B>C
2. B>A>C
3. C>B>A
4. C>A>B
A. \(\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}^{-}\)
B. \(\mathrm{H}-\mathrm{C} \equiv \mathrm{C}^{-}\)
C. \(\mathrm{H}_3 \mathrm{C}-\mathrm{\bar{C}H_2}\)
Arrange the following alkyl halides in decreasing order of the rate of -elimination reaction with alcoholic KOH.
| A. |  |
| B. | CH3-CH2-Br |
| C. | CH3-CH2-CH2-Br |
1. A>B>C
2. C>B>A
3. B>C>A
4. A>C>B
Among the following reactions, incomplete combustion of methane is-
| 1. | \(2 \mathrm{CH}_4+\mathrm{O}_2 \xrightarrow[]{\mathrm{Cu/523 \ K/100 \ atm}} 2 \mathrm{CH}_3 \mathrm{OH}\) |
| 2. | \(\mathrm{CH}_4+\mathrm{O}_2 \xrightarrow[]{\mathrm{Mo_{2}O_{3}}} \mathrm{HCHO}+\mathrm{H}_2 \mathrm{O}\) |
| 3. | CH4 + O2 → C + 2H2O |
| 4. | CH4 + 2O2 → CO2 + 2H2O |
Match the hydrocarbons in Column I with the boiling points given in Column II.
| A. n-pentane | 1. 282.5 K |
| B. iso-pentane | 2. 309 K |
| C. neo-pentane | 3. 301 K |
Codes
| Options: | A | B | C |
| 1. | 2 | 3 | 1 |
| 2. | 1 | 2 | 3 |
| 3. | 2 | 1 | 3 |
| 4. | 3 | 2 | 1 |
Match the following reactants in Column I with the corresponding reaction products in Column II.
|
Column I |
Column II |
|
A. |
1. Benzoic acid |
|
B. |
2. Methyl phenyl ketone |
|
C. |
3. Toluene |
|
D. |
4. Chlorobenzene |
|
5. Benzene hexachloride |
| Options: | A | B | C | D |
| 1. | 4 | 3 | 2 | 1 |
| 2. | 1 | 2 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
Match the reactions given in Column I with the type of reaction given
in Column II and mark the appropriate option.
| Column I | Column II | ||
| A. | CH2=CH2 + H2O \(\xrightarrow[]{H^{+}}\) CH3CH2OH |
1. | Hydrogenation |
| B. | CH2=CH2 + H2 \(\xrightarrow[]{Pd}\) CH3-CH3 |
2. | Halogenation |
| C. | CH2=CH2 + Cl2 → Cl-CH2-CH2-Cl |
3. | Polymerisation |
| D. | 3CH≡CH \(\xrightarrow[heat]{Cu \ tube}\) C6H6 |
4. | Hydration |
| 5. | Condensation | ||
Codes
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 1 | 2 | 3 |
Given below are two statements:
| Assertion (A): | The compound tetraene has the following structural formula. It is a cyclic and has conjugated 8π electrons system but it is not an aromatic compound. |
| Reason (R): | ( 4 n + 2 ) π electrons rule does not hold good for this compound and the ring is not planar. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Assertion: Toluene on Friedel Crafts methylation gives o- and p- xylene.
Reason: -group bonded to benzene ring increases electron density at o- and p- position.
1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true and the reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Assertion is false but the reason is true.
| Assertion (A): | Nitration of benzene with nitric acid requires the use of concentrated sulphuric acid. |
| Reason (R): | The mixture of concentrated sulphuric acid and concentrated nitric acid produces the electrophile, NO2+ . |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Given below are two statements:
| Assertion (A): | Among isomeric pentanes, 2,2-dimethylpropane has the highest boiling point. |
| Reason (R): | Branching does not affect the boiling point. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | Both (A) and (R) are false. |
| 4. | (A) is true but (R) is false. |
© 2024 GoodEd Technologies Pvt. Ltd.