Organic Chemistry: Some Basic Principles and Techniques MCQ Class 11

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MCQ Questions for Class 11 Chemistry with Answers

Q1. Identify the chiral molecule among the following:

(i) Isopropyl alcohol
(ii) 2-pentanol
(iii) 1-bromo 3-butene
(iv) Isobutyl alcohol

(iv) Isobutyl alcohol

Q2. Which of the following compounds possess the C-H bond with the lowest bond dissociation energy?

(i) Toluene
(ii) Benzene
(iii) n-Pentane
(iv) 2, 2-Dimethyl propane

(i) Toluene

Q3. The displacement of electrons in a multiple bond in the presence of attacking reagent is called

(i) Inductive effect
(ii) Electromeric effect
(iii) Resonance
(iv) Hyper conjugation.

(ii) Electromeric effect

Q4. First organic compound to be synthesised was

(i) urea
(ii) cane sugar
(iii) methane
(iv) acetic acid

(i) urea

Q5. 0.5 g of hydrocarbon gave 0.9 g water on combustion. The percentage of carbon in hydrocarbon is

(i) 75.8
(ii) 80.0
(iii) 56.6
(iv) 28.6

(ii) 80.0

Q6. The I.U.P.A.C. name of CH₃ – CH = CH COO C₂H₅ is

(i) Ethyl but-1 -enoate
(ii) Ethyl but-2-enoate
(iii) Ethyl prop-2-enoate
(iv) None of these.

(ii) Ethyl but-2-enoate

Q7. Which of the following cannot be represented by resonance structures?

(i) Dimethyl ether
(ii) Nitrate anion
(iii) Carboxylate anion
(iv) Toluene

(i) Dimethyl ether

Q8. In laboratory, first organic compound was synthesised by

(i) Wohler
(ii) Kekule
(iii) Hennel
(iv) Liebig

(i) Wohler

Q9. What is the state of hybridisation of carbon in carbanion?

(i) sp
(ii) sp²
(iii) sp³
(iv) sp²d.

(iii) sp³

Q10. Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is

(i) 350
(ii) 470
(iii) 560
(iv) 940

(iv) 940

Q11. The percentage of s- character of the hybrid orbitals in ethane, ethene and ethyne are respectively

(i) 25, 33, 50
(ii) 50, 75, 100
(iii) 25, 50, 75
(iv) 10, 20, 40

(i) 25, 33, 50

Q12. The displacement of electrons in a multiple bond in the presence of attacking reagent is called

(i) Inductive effect
(ii) Electromeric effect
(iii) Resonance
(iv) Hyper conjugation

(ii) Electromeric effect

Q13. 59 g of an amide obtained from a carboxylic acid, RCOOH, liberated 17 g of ammonia upon heating with alkali. The acid is

(i) Formic Acid
(ii) Acetic Acid
(iii) Propionic Acid
(iv) Benzoic Acid

(ii) Acetic Acid

Q14. Butanone is a four-carbon compound with the functional group –

(i) ketone
(ii) carboxylic acid
(iii) aldehyde.
(iv) alcohol.

(i) ketone

Q15. Inductive effect involves

(i) displacement of σ electrons
(ii) delocalization of π electrons
(iii) delocalization of σ-electrons
(iv) displacement of π-electrons

(i) displacement of σ electrons

Q16. Which one of the following conformations of cyclohexane is chiral?

(i) Twist boat
(ii) Rigid
(iii) Chair
(iv) Boat

(i) Twist boat

Q17. The compound which has one isopropyl group is

(i) 2- Methypentane
(ii) 2, 2, 3- Trimethylpentane
(iii) 2, 2 – Dimethylpentane
(iv) 2, 2, 3, 3 – Tetramethylpentane

(i) 2- Methypentane

Q18. Which of the following physical properties differ for each of a pair of enantiomers?

(i) solubility in ethanol
(ii) direction of rotation of plane-polarized light
(iii) boiling point and melting point
(iv) index of refraction

(ii) direction of rotation of plane-polarized light

Q19. Which element is estimated by Carius method

(i) Carbon
(ii) Hydrogen
(iii) Halogen
(iv) Nitrogen

(iii) Halogen

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Organic Chemistry: Some Basic Principles and Techniques MCQ Questions for Class 11 Chemistry Chapter 12 with Answers

MCQ Questions for Class 11 Chemistry with Answers

Q1. Identify the chiral molecule among the following:

Q2. Which of the following compounds possess the C-H bond with the lowest bond dissociation energy?

Q3. The displacement of electrons in a multiple bond in the presence of attacking reagent is called

Q4. First organic compound to be synthesised was

Q5. 0.5 g of hydrocarbon gave 0.9 g water on combustion. The percentage of carbon in hydrocarbon is

Q6. The I.U.P.A.C. name of CH₃ – CH = CH COO C₂H₅ is

Q7. Which of the following cannot be represented by resonance structures?

Q8. In laboratory, first organic compound was synthesised by

Q9. What is the state of hybridisation of carbon in carbanion?

Q10. Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is

Q11. The percentage of s- character of the hybrid orbitals in ethane, ethene and ethyne are respectively

Q12. The displacement of electrons in a multiple bond in the presence of attacking reagent is called

Q13. 59 g of an amide obtained from a carboxylic acid, RCOOH, liberated 17 g of ammonia upon heating with alkali. The acid is

Q14. Butanone is a four-carbon compound with the functional group –

Q15. Inductive effect involves

Q16. Which one of the following conformations of cyclohexane is chiral?

Q17. The compound which has one isopropyl group is

Q18. Which of the following physical properties differ for each of a pair of enantiomers?

Q19. Which element is estimated by Carius method

MCQ Questions for Class 11 Chemistry Chapter wise with Answers

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MCQ Questions for Class 11 Chemistry with Answers

Q1. Identify the chiral molecule among the following:

Q2. Which of the following compounds possess the C-H bond with the lowest bond dissociation energy?

Q3. The displacement of electrons in a multiple bond in the presence of attacking reagent is called

Q4. First organic compound to be synthesised was

Q5. 0.5 g of hydrocarbon gave 0.9 g water on combustion. The percentage of carbon in hydrocarbon is

Q6. The I.U.P.A.C. name of CH3 – CH = CH COO C2H5 is

Q7. Which of the following cannot be represented by resonance structures?

Q8. In laboratory, first organic compound was synthesised by

Q9. What is the state of hybridisation of carbon in carbanion?

Q10. Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is

Q11. The percentage of s- character of the hybrid orbitals in ethane, ethene and ethyne are respectively

Q12. The displacement of electrons in a multiple bond in the presence of attacking reagent is called

Q13. 59 g of an amide obtained from a carboxylic acid, RCOOH, liberated 17 g of ammonia upon heating with alkali. The acid is

Q14. Butanone is a four-carbon compound with the functional group –

Q15. Inductive effect involves

Q16. Which one of the following conformations of cyclohexane is chiral?

Q17. The compound which has one isopropyl group is

Q18. Which of the following physical properties differ for each of a pair of enantiomers?

Q19. Which element is estimated by Carius method

MCQ Questions for Class 11 Chemistry Chapter wise with Answers

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Q6. The I.U.P.A.C. name of CH₃ – CH = CH COO C₂H₅ is