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Single answer questions

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Suresh Kumar

This document contains 5 single answer chemistry questions. Question 1 asks about the product of ozonolysis of a hydrocarbon. Question 2 asks about the major product when a compound is treated with bromine. Question 3 asks which reagent cannot be used for alcohol dehydration. Question 4 asks about something that is not true of benzene sulfonation. Question 5 asks which is the fastest reaction. The answers are listed as C, C, D, D, D respectively.

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Single Answer Questions 1. A hydrocarbon of formula C6 H10 on ozonolysis gives only one carbonyl compound. The compound cannot be (a) (b) (c) (d) 2. When 2-methyle-l-butene is treated with Br2 in methanol the major product is a (a) Dibromide (b) Bromley driu (c) Bromoether (d) Alkoxyalkanol 3. Which of the following cannot be used as reagents for the dehydration of alcohols to give alkenes? (a) H 2 SO4 (b) H 3 PO4 (c) Al2O3 (d) CrO3 4. Which of the following is not true about sulphonation of benzene? (a) It is Reversible (b) The Electrophile is SO3 . (c) An isotope effect has been observed on using C6 D6 in place of C6 H 6 . (d) The r, d, s, is the abstraction of proton from the α -complex formed by reaction of benzene units the electrophile. 5. Which among the following is the fastest reaction? (a) H 3C − CH = CH 2  H 3C − CHBr − CH 2 Br → Br2 Ccl4 (b) H 3C − CH = CH 2  Br CH 2 − CH = CH 2 → NBS CCl4 (c) H 3C − CH = CH 2  H 3C − CH OH − CH 2 Br → Br2 H 2O (d) H 3C − CH = CH − CH 2 − Br  H 3C − CH = CH − CH 2 Mg BR + H 3 C − CH − CH = CH 2 Mg ether → | MgBr 1. C 2. C 3. D 4. D 5. D

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Single answer questions

  • 1. Single Answer Questions 1. A hydrocarbon of formula C6 H10 on ozonolysis gives only one carbonyl compound. The compound cannot be (a) (b) (c) (d) 2. When 2-methyle-l-butene is treated with Br2 in methanol the major product is a (a) Dibromide (b) Bromley driu (c) Bromoether (d) Alkoxyalkanol 3. Which of the following cannot be used as reagents for the dehydration of alcohols to give alkenes? (a) H 2 SO4 (b) H 3 PO4 (c) Al2O3 (d) CrO3 4. Which of the following is not true about sulphonation of benzene? (a) It is Reversible (b) The Electrophile is SO3 . (c) An isotope effect has been observed on using C6 D6 in place of C6 H 6 . (d) The r, d, s, is the abstraction of proton from the α -complex formed by reaction of benzene units the electrophile. 5. Which among the following is the fastest reaction? (a) H 3C − CH = CH 2  H 3C − CHBr − CH 2 Br → Br2 Ccl4 (b) H 3C − CH = CH 2  Br CH 2 − CH = CH 2 → NBS CCl4 (c) H 3C − CH = CH 2  H 3C − CH OH − CH 2 Br → Br2 H 2O (d) H 3C − CH = CH − CH 2 − Br  H 3C − CH = CH − CH 2 Mg BR + H 3 C − CH − CH = CH 2 Mg ether → | MgBr 1. C 2. C 3. D 4. D 5. D