Q. No.
Which of the following statements is true for the reaction given below?
1. P is a meso compound 2,3-butanedi 01 formed by syn addition
2. P is a meso compound formed by anti addition
3. P is a racemic mixture of d- and l- 2,3" butanediol formed by anti addition
4. P is a racemic mixture of d- and l- 2,3- butanediol formed by Syn addition
The reagents required for the following two-step transformation are:
1. (i) HBr, benzoyl peroxide, (ii) CH3CN
2. (i) HBr, (ii) NaCN
3. (i) Br2, (ii) NaCN
4. (i) NaBr, (ii) NaCN
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Organic compounds sometimes adjust their electronic as well as steric structures to attain stability. Among the following, the compounds having the highest dipole moments is
1. 
2. 
3. 
4. 
Terpinene-4-ol, an active ingredient in tea tree oil, has the following structure:
The correct observations for terpinene-4-ol are:
| I: | It rotates the plane of plane-polarized light. |
| II: | It reacts with Baeyer's reagent to form a triol. |
| III: | On reaction with NaBr and H2SO4 , it gives a dibromo compound. |
| IV: | On ozonolysis, it gives a compound with the molecular formula C10H18O3 . |
1. I, II, III, and IV
2. I, III, and IV
3. II and III
4. III and IV
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Addition of bromine to cis-3-hexene gives
1. Racemic dibromide
2. A mixture of diastereomeric dibromides
3. Optically active dibromide
4. Meso dibromide
Among the following compounds the one that is most reactive towards electrophilic nitration is
1. Benzoic acid
2. Nitrobenzene
3. Toluene
4. Benzene
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Some meta-directing substituents in aromatic substitution are given. Which one is the most deactivating?
| 1. | –SO3H | 2. | –COOH |
| 3. | –NO2 | 4. | –C≡N |
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