ORGANIC CHEMISTRY Basic Principles and Techniques NCERT EXEMPLAR JEE Notes | EduRev

JEE : ORGANIC CHEMISTRY Basic Principles and Techniques NCERT EXEMPLAR JEE Notes | EduRev

 Page 1


1. Which of the following is the correct IUPAC name?
(i) 3-Ethyl-4, 4-dimethylheptane
(ii) 4,4-Dimethyl-3-ethylheptane
(iii) 5-Ethyl-4, 4-dimethylheptane
(iv) 4,4-Bis(methyl)-3-ethylheptane
2. The IUPAC name for    is ________.
(i) 1-hydroxypentane-1,4-dione
(ii) 1,4-dioxopentanol
(iii) 1-carboxybutan-3-one
(iv) 4-oxopentanoic acid
3. The IUPAC name for
I. Multiple Choice Questions (Type-I)
Unit Unit Unit Unit Unit
12 12
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
Page 2


1. Which of the following is the correct IUPAC name?
(i) 3-Ethyl-4, 4-dimethylheptane
(ii) 4,4-Dimethyl-3-ethylheptane
(iii) 5-Ethyl-4, 4-dimethylheptane
(iv) 4,4-Bis(methyl)-3-ethylheptane
2. The IUPAC name for    is ________.
(i) 1-hydroxypentane-1,4-dione
(ii) 1,4-dioxopentanol
(iii) 1-carboxybutan-3-one
(iv) 4-oxopentanoic acid
3. The IUPAC name for
I. Multiple Choice Questions (Type-I)
Unit Unit Unit Unit Unit
12 12
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
(i) 1-Chloro-2-nitro-4-methylbenzene
(ii) 1-Chloro-4-methyl-2-nitrobenzene
(iii) 2-Chloro-1-nitro-5-methylbenzene
(iv) m-Nitro-p-chlorotoluene
4. Electronegativity of carbon atoms depends upon their state of hybridisation.
In which of the following compounds, the carbon marked with asterisk is
most electronegative?
(i) CH
3
 – CH
2 
– *CH
2
 –CH
3
(ii) CH
3
 – *CH = CH – CH
3
(iii) CH
3
 – CH
2
 – C  =  *CH
(iv) CH
3
 – CH
2
 – CH  =  *CH
2
5. In which of the following, functional group isomerism is not possible?
(i) Alcohols
(ii) Aldehydes
(iii) Alkyl halides
(iv) Cyanides
6. The fragrance of flowers is due to the presence of some steam volatile organic
compounds called essential oils. These are generally insoluble in water at
room temperature but are miscible with water vapour in vapour phase. A
suitable method for the extraction of these oils from the flowers is:
(i) Distillation
(ii) Crystallisation
(iii) Distillation under reduced pressure
(iv) Steam distillation
7. During hearing of a court case, the judge suspected that some changes in the
documents had been carried out. He asked the forensic department to check
the ink used at two different places. According to you which technique can
give the best results?
(i) Column chromatography
(ii) Solvent extraction
(iii) Distillation
(iv) Thin layer chromatography
8. The principle involved in paper chromatography is
(i) Adsorption
(ii) Partition
(iii) Solubility
(iv) Volatility
145 Organic Chemistry – Some Basic Principles and Techniques
Page 3


1. Which of the following is the correct IUPAC name?
(i) 3-Ethyl-4, 4-dimethylheptane
(ii) 4,4-Dimethyl-3-ethylheptane
(iii) 5-Ethyl-4, 4-dimethylheptane
(iv) 4,4-Bis(methyl)-3-ethylheptane
2. The IUPAC name for    is ________.
(i) 1-hydroxypentane-1,4-dione
(ii) 1,4-dioxopentanol
(iii) 1-carboxybutan-3-one
(iv) 4-oxopentanoic acid
3. The IUPAC name for
I. Multiple Choice Questions (Type-I)
Unit Unit Unit Unit Unit
12 12
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
(i) 1-Chloro-2-nitro-4-methylbenzene
(ii) 1-Chloro-4-methyl-2-nitrobenzene
(iii) 2-Chloro-1-nitro-5-methylbenzene
(iv) m-Nitro-p-chlorotoluene
4. Electronegativity of carbon atoms depends upon their state of hybridisation.
In which of the following compounds, the carbon marked with asterisk is
most electronegative?
(i) CH
3
 – CH
2 
– *CH
2
 –CH
3
(ii) CH
3
 – *CH = CH – CH
3
(iii) CH
3
 – CH
2
 – C  =  *CH
(iv) CH
3
 – CH
2
 – CH  =  *CH
2
5. In which of the following, functional group isomerism is not possible?
(i) Alcohols
(ii) Aldehydes
(iii) Alkyl halides
(iv) Cyanides
6. The fragrance of flowers is due to the presence of some steam volatile organic
compounds called essential oils. These are generally insoluble in water at
room temperature but are miscible with water vapour in vapour phase. A
suitable method for the extraction of these oils from the flowers is:
(i) Distillation
(ii) Crystallisation
(iii) Distillation under reduced pressure
(iv) Steam distillation
7. During hearing of a court case, the judge suspected that some changes in the
documents had been carried out. He asked the forensic department to check
the ink used at two different places. According to you which technique can
give the best results?
(i) Column chromatography
(ii) Solvent extraction
(iii) Distillation
(iv) Thin layer chromatography
8. The principle involved in paper chromatography is
(i) Adsorption
(ii) Partition
(iii) Solubility
(iv) Volatility
145 Organic Chemistry – Some Basic Principles and Techniques 146 Exemplar Problems, Chemistry
9. What is the correct order of decreasing stability of the following cations.
I. II. III.
(i) II > I > III
(ii) II > III > I
(iii) III > I > II
(iv) I > II > III
10. Correct IUPAC name for  is ___________.
(i) 2- ethyl-3-methylpentane
(ii) 3,4- dimethylhexane
(iii) 2-sec-butylbutane
(iv) 2, 3-dimethylbutane
11. In which of the following compounds the carbon marked with asterisk is
expected to have greatest positive charge?
(i) *CH
3
—CH
2
—Cl
(ii) *CH
3
—CH
2
—Mg
+
Cl
–
(iii) *CH
3
—CH
2
—Br
(iv) *CH
3
—CH
2
—CH
3
12. Ionic species are stabilised by the dispersal of charge. Which of the
following carboxylate ion is the most stable?
(i)
(ii)
(iii)
(iv)
13. Electrophilic addition reactions proceed in two steps. The first step
involves the addition of an electrophile. Name the type of intermediate
formed in the first step of the following addition reaction.
H
3
C—HC = CH
2
 + H
+
  ???
Page 4


1. Which of the following is the correct IUPAC name?
(i) 3-Ethyl-4, 4-dimethylheptane
(ii) 4,4-Dimethyl-3-ethylheptane
(iii) 5-Ethyl-4, 4-dimethylheptane
(iv) 4,4-Bis(methyl)-3-ethylheptane
2. The IUPAC name for    is ________.
(i) 1-hydroxypentane-1,4-dione
(ii) 1,4-dioxopentanol
(iii) 1-carboxybutan-3-one
(iv) 4-oxopentanoic acid
3. The IUPAC name for
I. Multiple Choice Questions (Type-I)
Unit Unit Unit Unit Unit
12 12
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
(i) 1-Chloro-2-nitro-4-methylbenzene
(ii) 1-Chloro-4-methyl-2-nitrobenzene
(iii) 2-Chloro-1-nitro-5-methylbenzene
(iv) m-Nitro-p-chlorotoluene
4. Electronegativity of carbon atoms depends upon their state of hybridisation.
In which of the following compounds, the carbon marked with asterisk is
most electronegative?
(i) CH
3
 – CH
2 
– *CH
2
 –CH
3
(ii) CH
3
 – *CH = CH – CH
3
(iii) CH
3
 – CH
2
 – C  =  *CH
(iv) CH
3
 – CH
2
 – CH  =  *CH
2
5. In which of the following, functional group isomerism is not possible?
(i) Alcohols
(ii) Aldehydes
(iii) Alkyl halides
(iv) Cyanides
6. The fragrance of flowers is due to the presence of some steam volatile organic
compounds called essential oils. These are generally insoluble in water at
room temperature but are miscible with water vapour in vapour phase. A
suitable method for the extraction of these oils from the flowers is:
(i) Distillation
(ii) Crystallisation
(iii) Distillation under reduced pressure
(iv) Steam distillation
7. During hearing of a court case, the judge suspected that some changes in the
documents had been carried out. He asked the forensic department to check
the ink used at two different places. According to you which technique can
give the best results?
(i) Column chromatography
(ii) Solvent extraction
(iii) Distillation
(iv) Thin layer chromatography
8. The principle involved in paper chromatography is
(i) Adsorption
(ii) Partition
(iii) Solubility
(iv) Volatility
145 Organic Chemistry – Some Basic Principles and Techniques 146 Exemplar Problems, Chemistry
9. What is the correct order of decreasing stability of the following cations.
I. II. III.
(i) II > I > III
(ii) II > III > I
(iii) III > I > II
(iv) I > II > III
10. Correct IUPAC name for  is ___________.
(i) 2- ethyl-3-methylpentane
(ii) 3,4- dimethylhexane
(iii) 2-sec-butylbutane
(iv) 2, 3-dimethylbutane
11. In which of the following compounds the carbon marked with asterisk is
expected to have greatest positive charge?
(i) *CH
3
—CH
2
—Cl
(ii) *CH
3
—CH
2
—Mg
+
Cl
–
(iii) *CH
3
—CH
2
—Br
(iv) *CH
3
—CH
2
—CH
3
12. Ionic species are stabilised by the dispersal of charge. Which of the
following carboxylate ion is the most stable?
(i)
(ii)
(iii)
(iv)
13. Electrophilic addition reactions proceed in two steps. The first step
involves the addition of an electrophile. Name the type of intermediate
formed in the first step of the following addition reaction.
H
3
C—HC = CH
2
 + H
+
  ???
147 Organic Chemistry – Some Basic Principles and Techniques
(i) 2° Carbanion
(ii) 1° Carbocation
(iii) 2° Carbocation
(iv) 1° Carbanion
14. Covalent bond can undergo fission in two different ways. The correct
representation involving a heterolytic fission of CH
3
—Br is
(i)
(ii)
(iii)
(iv)
15. The addition of HCl to an alkene proceeds in two steps. The first step is the
attack of H
+
 ion to  portion which can be shown as
(i)
(ii)
(iii)
(iv) All of these are possible
II. Multiple Choice Questions (Type-II)
In the following questions two or more options may be correct.
16. Which of the following compounds contain all the carbon atoms in the same
hybridisation state?
(i) H—C = C—C = C—H
(ii) CH
3
—C = C—CH
3
(iii) CH
2
 = C = CH
2
(iv) CH
2
 = CH—CH = CH
2
17. In which of the following representations given below spatial arrangement of
group/ atom different from that given in structure ‘A’?
                    
(A)
Page 5


1. Which of the following is the correct IUPAC name?
(i) 3-Ethyl-4, 4-dimethylheptane
(ii) 4,4-Dimethyl-3-ethylheptane
(iii) 5-Ethyl-4, 4-dimethylheptane
(iv) 4,4-Bis(methyl)-3-ethylheptane
2. The IUPAC name for    is ________.
(i) 1-hydroxypentane-1,4-dione
(ii) 1,4-dioxopentanol
(iii) 1-carboxybutan-3-one
(iv) 4-oxopentanoic acid
3. The IUPAC name for
I. Multiple Choice Questions (Type-I)
Unit Unit Unit Unit Unit
12 12
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
ORG ORG ORG ORG ORGANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMIS ANIC CHEMISTRY TRY TRY TRY TRY
SOME B SOME B SOME B SOME B SOME BA A A A ASIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLE SIC PRINCIPLES S S S S
AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUE AND TECHNIQUES S S S S
(i) 1-Chloro-2-nitro-4-methylbenzene
(ii) 1-Chloro-4-methyl-2-nitrobenzene
(iii) 2-Chloro-1-nitro-5-methylbenzene
(iv) m-Nitro-p-chlorotoluene
4. Electronegativity of carbon atoms depends upon their state of hybridisation.
In which of the following compounds, the carbon marked with asterisk is
most electronegative?
(i) CH
3
 – CH
2 
– *CH
2
 –CH
3
(ii) CH
3
 – *CH = CH – CH
3
(iii) CH
3
 – CH
2
 – C  =  *CH
(iv) CH
3
 – CH
2
 – CH  =  *CH
2
5. In which of the following, functional group isomerism is not possible?
(i) Alcohols
(ii) Aldehydes
(iii) Alkyl halides
(iv) Cyanides
6. The fragrance of flowers is due to the presence of some steam volatile organic
compounds called essential oils. These are generally insoluble in water at
room temperature but are miscible with water vapour in vapour phase. A
suitable method for the extraction of these oils from the flowers is:
(i) Distillation
(ii) Crystallisation
(iii) Distillation under reduced pressure
(iv) Steam distillation
7. During hearing of a court case, the judge suspected that some changes in the
documents had been carried out. He asked the forensic department to check
the ink used at two different places. According to you which technique can
give the best results?
(i) Column chromatography
(ii) Solvent extraction
(iii) Distillation
(iv) Thin layer chromatography
8. The principle involved in paper chromatography is
(i) Adsorption
(ii) Partition
(iii) Solubility
(iv) Volatility
145 Organic Chemistry – Some Basic Principles and Techniques 146 Exemplar Problems, Chemistry
9. What is the correct order of decreasing stability of the following cations.
I. II. III.
(i) II > I > III
(ii) II > III > I
(iii) III > I > II
(iv) I > II > III
10. Correct IUPAC name for  is ___________.
(i) 2- ethyl-3-methylpentane
(ii) 3,4- dimethylhexane
(iii) 2-sec-butylbutane
(iv) 2, 3-dimethylbutane
11. In which of the following compounds the carbon marked with asterisk is
expected to have greatest positive charge?
(i) *CH
3
—CH
2
—Cl
(ii) *CH
3
—CH
2
—Mg
+
Cl
–
(iii) *CH
3
—CH
2
—Br
(iv) *CH
3
—CH
2
—CH
3
12. Ionic species are stabilised by the dispersal of charge. Which of the
following carboxylate ion is the most stable?
(i)
(ii)
(iii)
(iv)
13. Electrophilic addition reactions proceed in two steps. The first step
involves the addition of an electrophile. Name the type of intermediate
formed in the first step of the following addition reaction.
H
3
C—HC = CH
2
 + H
+
  ???
147 Organic Chemistry – Some Basic Principles and Techniques
(i) 2° Carbanion
(ii) 1° Carbocation
(iii) 2° Carbocation
(iv) 1° Carbanion
14. Covalent bond can undergo fission in two different ways. The correct
representation involving a heterolytic fission of CH
3
—Br is
(i)
(ii)
(iii)
(iv)
15. The addition of HCl to an alkene proceeds in two steps. The first step is the
attack of H
+
 ion to  portion which can be shown as
(i)
(ii)
(iii)
(iv) All of these are possible
II. Multiple Choice Questions (Type-II)
In the following questions two or more options may be correct.
16. Which of the following compounds contain all the carbon atoms in the same
hybridisation state?
(i) H—C = C—C = C—H
(ii) CH
3
—C = C—CH
3
(iii) CH
2
 = C = CH
2
(iv) CH
2
 = CH—CH = CH
2
17. In which of the following representations given below spatial arrangement of
group/ atom different from that given in structure ‘A’?
                    
(A)
148 Exemplar Problems, Chemistry
(i)
(ii)
(iii)
(iv)
18. Electrophiles are electron seeking species. Which of the following groups
contain only electrophiles?
(i) B F
3 
, NH
3
 , H
2
O
(ii) AlCl
3
, SO
3
 ,
+
2
NO
(iii) NO
2
+ 
, CH
3
+ 
, 
3
CH – 
 
= O
(iv)
–
2 5
C H ,  ,
+
2 5
C H
Note : Consider the following four compounds for answering questions 19
and 20.
I.
II.
III.
IV.
19. Which of the following pairs are position isomers?
(i) I and II
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