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MDCAT Organic Chemistry Fundamental Principles MCQS

MDCAT Organic Chemistry Fundamental Principles MCQS Test Preparation

1. Which of the following is not an aromatic compound?

a.Phenol

b.Benzaldehyde

c.Vinyl alcohol

d.Nitrobenzene

Question 1 of 33

2. Identify the incorrect statement about properties of organic compounds:

a.They have low melting points

b.Their solutions are non-conductor

c.They show isomerism

d.They are non-flammable

Question 2 of 33

3. Which of the following is not a polar molecules?

a.CHCl₃

b.CH₃COCH₃

c.CCl₄

d. CH₃OH

Question 3 of 33

4. Which one of the following statements is not correctly
matched?

a.Straight chain compound (1-Butene)

b.Alicyclic compound (Cyclohexene)

c.Aromatic compound (Toluene)

d.Heterocyclic compound (Aniline)

Question 4 of 33

5. Which of the following is not example of heterocyclic
compound?

a.Pyrrole

b.Catechol

c.Furan

d.Thiophene

Question 5 of 33

6. Which of the following is not nucleophiles?

a.R₃C⁺

b.R – CH₂^-

c.CN^-

d.NH₃

Question 6 of 33

7. Which of the following is electrophile?

a.Cl^-

b.BF³

c.H₂O

d.NH₂^-

Question 7 of 33

8. Which of the following hydrocarbons is the most reactive?

a. Alkane

b.Alkyne

c. Alkene

d. Benzene

Question 8 of 33

9. In geometric isomerism, the cis-isomers have all of the
following properties EXCEPT:

a.They are polar molecules

b.They have high boiling points

c.They are symmetrical molecules

d.They have low melting points

Question 9 of 33

10. Which of the following organic compounds does not show
geometric isomerism?

a.2-Butene

b. 3-Hexene

c.2-Pentene

d.1-Butene

Question 10 of 33

11. Which of the following is/are basic conditions for geometric
isomerism?

a.Having Carbon Carbon double bond (C = C)

b.Different groups are attached with carbon containing double bond

c.Double bond involves free rotation

d.Both A and B

Question 11 of 33

12. Which of the following is the most stable free radical?

Question 12 of 33

13. Which of the following is the least stable carbocation?

a.Me₃C⁺

b.CH⁺₃

c.Me₂CH⁺

d.MeCH⁺₂

Question 13 of 33

14. The correct name according to IUPAC of the given structure is:

a. 4-Amino-3-chlorohexanoic acid

b.3-Amino-4-chlorohexanoic acid

c. 4-Amino-5-chlorohexanoic acid

d.2-Amino-3-chlorohexanoic acid

Question 14 of 33

15. Which of the following type of cracking (pyrolysis) is used to increase production of petrol?

a.Thermal cracking

b.Catalytic cracking

c.Electrolytic cracking

d.Steam cracking

Question 15 of 33

16. Consider the following condensed formula of alkane:
(CH₃)₂CH(CH₂)-C(CH₃)₃Correct name of above formula according to IUPAC is:

a. 2,3,4-Trimethylpentane

b. 2,6,6-Trimethylpentane

c.2,4,4-Trimethylpentane

d.2,2,4-Trimethylpentane

Question 16 of 33

17. The structural formula of the following given compound
4-Ethyl-3,4-dimethylheptane is:

Question 17 of 33

18. Consider the following structural formula of alcohol:

he correct name of above formula according to IUPAC is:

a.1,2,3-Pentanetriol

b.1,2,3-Propanetriol

c.Pentane-2,3,4-triol

d.Propylene-1,2,3-triol

Question 18 of 33

19. Consider the following structural formula of a carboxylic
acid:

The correct name according to IUPAC is:

a.5-Methylhexanoic acid

b.2-Methylhexanoic acid

c.2-Methyl-5-hexanoic acid

d.5-Methylvaleric acid

Question 19 of 33

20. The correct name according to IUPAC of the following alkene is:

a.1,3-Pentadiene

b.2,4-Pentadiene

c.2,3-Pentadiene

d.1,4-Pentadiene

Question 20 of 33

21. An atom or a group of atoms or a double bond or triple bond whose presence imparts specific properties to organic compounds is called a functional group, because they are the chemically functional parts of molecules. Which of the following is functional group of carboxylic acid?

a.-COOH

b.-CONH₂

c.-CHO

d.-OH

Question 21 of 33

22. Which of the following is functional group of thioalcohol?

a.Cyano group

b.Formyl group

c.Mercapto group

d.Amino group

Question 22 of 33

23. The type of isomerism which arises due to shifting of proton from one atom to other in the same molecule is
called:

a.Tautomerism

b.Metamerism

c.Geometric isomerism

d.Chain isomerism

Question 23 of 33

24. Which of the following class of organic compounds contains ring which has more than one kind of atoms?

a.Aromatic

b.Heterocyclic

c.Non-benzenoid

d.Aliphatic

Question 24 of 33

25. The type of structural isomerism which arises due to the unequal distribution of carbon atoms on either side of the functional group is called:

a.Chain isomerism

b.Metamerism

c.Tautomerism

d.Position isomerism

Question 25 of 33

26. Which of the following pair of organic compounds shows position isomerism?

a.CH₃-CH₂-CHO and CH₃-CO-CH₃

b.CH₃-CH₂-CH₂-OH and CH₃-CH(OH)CH₃

c.C₂H₅-O-C₂H₅ and CH₃-O-C₃H₇

d.CH₃-COOH and HCOOCH₃

Question 26 of 33

27. There are two types of isomerism i.e. structural isomerism and stereoisomerism. The two main types of stereoisomerism are: Diastereomerism (including 'cis-trans isomerism' and Optical Isomerism). Each non-superimposable mirror image structure is called a/an

a.Metamer

b.Elastomer

c.Enantiomer

d.Tautomer

Question 27 of 33

28. Which of the following is skeletal formula of hexane?

a.C₆H₁₄

b.H₃C – CH₂ – CH₂ – CH₂ –CH₂ – CH₃

Question 28 of 33

29. Which of the following is structural formula of pentane?

b.H₃C – CH₂ – CH₂ – CH₂ – CH₃

c.H₃C(CH₂)₃CH₃

Question 29 of 33

30. A reaction which results in the removal of a small molecule from a large one is called?

a.Addition reaction

b.Elimination reaction

c.Substitution reaction

d.Oxidation reaction

Question 30 of 33

31. Which of the following terms is not used for organic compound?

a.Molecular formula

b.Structural formula

c.Skeletal formula

d.Ionic formula

Question 31 of 33

32. Mark the incorrect statement about petrol (gasoline):

a.Greater is octane number better is the quality of petrol

b.Quality of petrol is increased by reforming

c.Production of petrol is increased by cracking

d.If octane number of petrol is 60 it is considered good quality of petrol

Question 32 of 33

33. Which of the following is/are types of organic reactions mechanisms?

a.Polar or ionic mechanism only

b.Free radical mechanism only

c.Both A and B

d.Neither A nor B

Question 33 of 33

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