List I | List II | ||
(P) | ![]() | (1) | ![]() |
(Q) | ![]() | (2) | ![]() |
(R) | ![]() | (3) | ![]() |
(S) | ![]() | (4) | ![]() |
(5) | ![]() |
Step 1: Understanding the Reaction Sequences
Step 2: Conclusion
Thus, the correct answer is (A) P-3, Q-5, R-4, S-1.
To solve the problem, we analyze each reaction sequence and determine the corresponding product structure based on the given reagents and conditions.
1. For (P):
- Ozonolysis of cyclohexene with Zn and aqueous NaOH gives a dione intermediate.
- Treatment with ethylene glycol and PTSA forms an acetal.
- Hydroboration-oxidation (BH3, H2O2, NaOH) adds hydroxyl groups.
- Acidification and reduction (H3O+, NaBH4) complete the process.
- The product corresponds to structure (3), a diol on cyclopentane with a methyl substituent.
2. For (Q):
- Similar steps applied to methylcyclopentene.
- Results in a diol with hydroxyls and a methyl group, structure (5).
3. For (R):
- Starting from methylcyclopentenone.
- Protection, oxymercuration-demercuration, acidification, and reduction lead to structure (4).
4. For (S):
- Starting from methylcyclopentenone.
- Protection, hydroboration-oxidation, acidification, and reduction lead to structure (1).
Final Matching:
P - 3, Q - 5, R - 4, S - 1
Final Answer:
Option (A)
The order of acidity of the following compounds is:
(i) o-Nitrophenol
(ii) Phenol
(iii) o-Cresol
(iv) Ethanol
Given below are two statements:
Statement I: Dimethyl ether is completely soluble in water. However, diethyl ether is soluble in water to a very small extent.
Statement II: Sodium metal can be used to dry diethyl ether and not ethyl alcohol.
In the light of the given statements, choose the correct answer from the options given below:
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Then the value of $ pq $ is
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