NCERT Class 11 Chemistry Chapter 12 Organic Chemistry Some Basic Principles and Techniques MCQ

NCERT Class 11 Chemistry Chapter 12 Organic Chemistry Some Basic Principles and Techniques MCQ | Questions & Answers: Do you wish to test your knowledge about the Class 11 Chemistry Chapter 12 Organic Chemistry Some Basic Principles and Techniques? then without any delay grab this opportunity and attempt the below-provided quiz at your convenience.

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1. Which of the following scientist proposed that a ‘vital force’ was responsible for the formation of organic compounds ?

A. Berzelius

B. Wohler

C. Berthelot

D. Kolbe

2. First organic compound to be synthesised was

A. urea

B. cane sugar

C. methane

D. acetic acid

3. Which of the following organic compound was synthesised by F. Wohler from an inorganic compound?

A. Urea

B. Chloroform

C. Methane

D. Acetic acid

4. The discovery that shook the belief in the vital force theory was

A. Wohler's synthesis of urea from ammonium cyanate

B. Fermentation of sugars

C. Synthesis of indigo

D. Stereoisomerism

5. In laboratory, first organic compound was synthesised by

A. Wohler

B. Kekule

C. Hennel

D. Liebig

6. Who is known as the “Father of Chemistry”?

A. Lavoisier

B. Priestley

C. Faraday

D. Rutherford

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

A. 25, 33, 50

B. 50, 75, 100

C. 25, 50, 75

D. 10, 20, 40

8. The functional group present in organic, acid is –

A. –COOH

B. – OH

C. – CHO

D. > C = O

9. Which of these contains the carbonyl group?

A. all of these

B. aldehydes

C. ketones

D. esters

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

A. ketone

B. carboxylic acid

C. aldehyde.

D. alcohol.

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11. Which of the following compounds contains 1°, 2°, 3° as well as 4° carbon atoms ?

A. 2,2,3-trimethyl pentane

B. 2-methyl pentane

C. Neopentane

D. 2,3-dimethyl butane

12. The number of secondary hydrogens in 2, 2-dimethylbutane is

A. 2

B. 6

C. 8

D. 4

13. The compound which has one isopropyl group is

A. 2- Methypentane

B. 2, 2, 3- Trimethylpentane

C. 2, 2 - Dimethylpentane

D. 2, 2, 3, 3 - Tetramethylpentane

14. Which of the following statements is false for isopentane ?

A. It has a carbon which is not bonded to hydrogen

B. It has one CH group

C. It has one CH₂ group

D. It has three CH₃ groups

15. The number of primary, secondary and tertiary carbons in 3, 4-dimethylheptane are respectively

A. 4, 3 and 2

B. 4, 2 and 3

C. 2, 3 and 4

D. 3, 4 and 2

16. The number of primary, secondary, tertiary and quaternary carbons in neopentane are respectively

A. 4, 0, 0 and 1

B. 4, 3, 2 and 1

C. 5, 0, 0 and 1

D. 4, 0, 1 and 1

17. What is the IUPAC name of t-butyl alcohol.

A. 2–Methyl-propane–2-ol

B. Propanol-2

C. Butanol–2

D. Butanol–1

18. The IUPAC name of CH₃COCH (CH₃)₂ is -

A. 3-methyl-2-butanone

B. 4-methyl isopropyl ketone

C. 2-methyl-3-butanone

D. isopropyl methyl ketone

19. Which of the following statements is false for isopentane–

A. It has a carbon which is not bonded to hydrogen

B. It has one CH group

C. It has three CH₃ groups

D. It has one CH₂ group

20. The IUPAC name of neopentane is

A. 2, 2-dimethylpropane

B. 2, 2-dimethylbutane

C. 2-methylpropane

D. 2-methylbutane

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21. If two compounds have the same empirical formula but the different molecular formulas they must have

A. Different percentage composition

B. Different molecular weight

C. Same viscosity

D. Same vapour density

22. Identify the chiral molecule among the following:

A. Isopropyl alcohol

B. 2-pentanol

C. 1-bromo 3-butene

D. Isobutyl alcohol

23. 0.0833mol of carbohydrate of empirical formula CH₂O contain 1g of hydrogen. The molecular formula of the carbohydrate is

A. C₅H₁₀O₅

B. C₃H₄O₃

C. C₁₂H₂₂O₁₁

D. C₆H₁₂O₆

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

A. Inductive effect

B. Electromeric effect

C. Resonance

D. Hyper conjugation.

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

A. Dimethyl ether

B. Nitrate anion

C. Carboxylate anion

D. Toluene