Q. No.
The molecule among the following having the highest reactivity toward the SN1 reaction is:
1. C6H5CH(C6H5)Br
2. C6H5CH(CH3)Br
3. C6H5C(CH3)(C6H5)Br
4. C6H5CH2Br
A: Inductive effect is a permanent effect.
R: group shows +l effect.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.
A: Resonating structures should have the same number of unpaired electrons.
R: The energy content of all resonating structures is the same.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.
| Assertion (A): | Cyclopentadienyl anion is much more stable than the allyl anion. |
| Reason (R): | Cyclopentadienyl anion is aromatic while allyl anion is only resonance stabilized. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
| Assertion (A): | Benzene and naphthalene are aromatic hydrocarbons. |
| Reason (R): | Benzene and naphthalene contain the same number of delocalized π electrons. |
| 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 a True but (R) is False. |
| 4. | Both (A) and (R) are False. |
A: Alkyl groups show +l effect.
R: Halogens are -l and +R groups.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.
| Assertion (A): |
2,3-Dimethyl-2-butene is the most stable alkene due to 12- hydrogen atoms. |
| Reason (R): | H' is more electronegative than carbon. |
| 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. | Both (A) and (R) are False. |
A: A compound having a non-superimposable mirror image is optically active.
R: Optically active compound must contain chiral carbon.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but Reason is false
4. Both Assertion and Reason are false statements.
Which of the following compounds is an isomer of methyl vinyl ether?
1. Propanal
2. 1-Propanol
3. Ethyl methyl ether
4. Dimethylether
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