Quiz about IUPAC-NOMENCLATURE IN GENERAL AWARENESS

Question 1

The hyrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is A. 44-dimethylpenteneB. 22-dimenthyl-3-penteneC. Isopropyl-2-buteneD. 22-dimethyl-4-pentene

Accepted Answer

NA

Question 2

`IUPAC` name of the compound A. `2`-Chlorocarbonyl ethylbenzene carboxylateB. `2`-Carboxyethylbenzoyl chlorideC. Ethyl `2`-(chlorocarbonyl)benzenecarboxylateD. Ethyl `1`-(chlorocarbonyl)benzenecarboxylate

Accepted Answer

NA

Question 3

The number of possible primary alcohols with the molecular `C_(4)H_(10)O` isA. 1B. 2C. 3D. 4

Accepted Answer

NA

Question 4

The correct `IUPAC` name of the compound A. `2`-Phenoxycarbonylbenzenecarboxylic acidB. Phenyl-`2`-carboxybenecarboxylateC. `2`-Benzoyloxybenzenecarboxylic acidD. `2`-Benzyloxycarbonylbenzenecarboxylic acid

Accepted Answer

NA

Question 5

Which of the following can be the isomer(s) of `C_(8)H_(8)O`A. B. C. D.

Accepted Answer

NA

Question 6

There are three isomeric compounds `PQR` with molecular formula `C_(4)H_(6)O_(3)`.Compound `P` is a saturated hydroxy carboxylic acid.Compound `Q` is a symmetrical anhydride while `R` is an aldehydic ester. Which of the following is the metamer of `Q`?A. `CH_(3)-oversetoverset(O)(||)(C)-O-oversetoverset(O)(||)(C)-CH_(3)`B. `H-oversetoverset(O)(||)(C)-O-oversetoverset(O)(||)(C)-CH_(2)-CH_(3)`C. `H-oversetoverset(O)(||)(C)-O-CH_(2)-oversetoverset(O)(||)(C)-CH_(3)`D. `CH_(3)-O-oversetoverset(O)(||)(C)-oversetoverset(O)(||)(C)-OCH_(3)`

Accepted Answer

NA

Question 7

Isomers have essentially identical.A. Structural formulaB. Chemical propertiesC. Molecular formulaD. Physical properties

Accepted Answer

NA

Question 8

What is the correct relationship between the following compounds? `CH_(3)-CH_(2)-undersetunderset(CH_(3))(|)(CH)-CH_(2)-CH_(3)CH_(3)-CH_(2)-CH_(2)-CH_(2)-undersetunderset(CH_(3))(|)(CH_(2))`A. Chain isomersB. Position isomersC. Functional isomersD. Identical

Accepted Answer

NA

Question 9

There are three isomeric compounds `PQR` with molecular formula `C_(4)H_(6)O_(3)`.Compound `P` is a saturated hydroxy carboxylic acid.Compound `Q` is a symmetrical anhydride while `R` is an aldehydic ester. Which of the following is `P`?A. B. C. D.

Accepted Answer

NA

Question 10

Compound with same molecular formula but different structure formula are calledA. IsomersB. IsotopesC. IsobarsD. Isoelectric

Accepted Answer

NA

Question 11

Which is the structure of pyrrole?A. B. C. D.

Accepted Answer

NA

Question 12

The `IUPAC` name of `CH_(3)COCH(CH_(3))_(2)` isA. isopropyl methyl ketoneB. 2-methyl-3-butanoneC. 4-methylisopropyl ketoneD. 3-methyl-2-butanone

Accepted Answer

NA

Question 13

The `IUPAC` name of `C_(6)H_(5)CH=CH-COOH` is ``A. Succinic acidB. 3-phenylprop-2-en-1-oic acidC. Mandelic acidD. Cinnamic acid

Accepted Answer

NA

Question 14

The name (s) of the following compound is  `(CH_(3))_(2)CHCN`A. 2-Methyl propane nitrileB. Isobutyro nitrileC. Isopropyl cyanideD. None of these

Accepted Answer

NA

Question 15

The names(s) of the following compound is  `underset(CH(OH)COOH)underset(|)(CH(OH)COOH)`A. tartaric acidB. 23-dihydroxy butane-14-dioic acidC. `alphaalpha`-dihydroxy succinic acidD. None of these

Accepted Answer

NA

Question 16

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1234....from one end of chain to the other in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical indicate this by the use of prefixes di tri tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3)` THe correct IUPAC name of the following compound is - `CH_(3)-CH_(2)-CH_(2)-underset(CH_(3))underset(|)underset(CH-CH_(3))underset(|)(CH)-CH_(2)-CH_(2)-underset(CH_(3))underset(|)(CH)-CH_(3)`A. 2-Methyl-5-isopropyloctaneB. 26-Dimethyl-5-propylheptaneC. 5-isopropyl-2-MethylocataneD. 4-(1-Methylethyl)-7-methylocatane

Accepted Answer

NA

Question 17

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1234....from one end of chain to the other in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical indicate this by the use of prefixes di tri tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3)` The IUPAC name of the compound is ? `CH_(3)-CH_(2)-underset(CH_(3))underset(|)(CH)-overset(CH_(3)-CH-CH_(2)-CH_(2)-CH_(3))overset(|)(CH)-underset(CH_(2)-CH_(3))underset(|)(CH)-CH_(2)-CH_(3)`A. 5-Ethyl-3-Methyl-4-(1-Methylpropyl) octaneB. 4-Ethyl-6-Methyl-5-(1-Methylpropyl) octaneC. 3-Ethyl-5-Methyl-4-(1-Methylpropyl) octaneD. 4-sec-butyl-5-Ethyl-5-Methyleptane

Accepted Answer

NA

Question 18

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1234....from one end of chain to the other in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical indicate this by the use of prefixes di tri tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3)` The correct lowest set of locant is -A. 3345B. 3455C. 4533D. 5543

Accepted Answer

NA

Question 19

Match the following the compounds of column I with column II. `(Column-IColumn-II)((A)C_(n)H_(2n+2)(p)Alkynes)((B)C_(n)H_(2n)(q)Alkenes)((C)C_(n)H_(2n-2)(r)Cyclohexane)((D)C_(6)H_(12)(s)Paraffins or alkanes)`

Accepted Answer

NA

Question 20

Match the following the compounds of column I with column II. `(Column-IColumn-II)((A)Wood spirit(p)2-Butyne)((B)Acetone(q)Trichloromethane)((C)Dimethyl acetylene(r)Methanol)((D)Chloroform(s)Propanone)`

Accepted Answer

NA

Question 21

Match column I with column II and select the correct answer from the given codes

Accepted Answer

NA

Question 22

Comprehension # 2 In addition to the standar ring systems (such as cyclohexane) cyclic compounds can also be bicylic tricylic etc. or they can be spirocyclic bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds but have the prefix spirocyclo. Answer the following question   what is the IUPAC name of the above compound ?A. cyclo[1.2.2]heptaneB. Bicycl [1.2.2]heptaneC. Bicyclo [2.2.1]heptaneD. cyclo[2.2.1]heptane

Accepted Answer

NA

Question 23

Comprehension In addition to the standar ring systems (such as cyclohexane) cyclic compounds can also be bicylic tricylic etc. or they can be spirocyclic bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds but have the prefix spirocyclo. Answer the following question  Which of the following is the correct structure of bicyclo `[1.1.0]` butane?A. B. C. D.

Accepted Answer

NA

Question 24

Comprehension # 2 In addition to the standar ring systems (such as cyclohexane) cyclic compounds can also be bicylic tricylic etc. or they can be spirocyclic bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds but have the prefix spirocyclo. Answer the following question  Select the correct statements about the following compounds  A. It is a tricyclic compoundB. It is bicyclo compoundC. It is spiro compoundD. Its IUPAC name is bicyclo [2.2.2] hexane

Accepted Answer

NA

Question 25

Comprehension # 2 In addition to the standar ring systems (such as cyclohexane) cyclic compounds can also be bicylic tricylic etc. or they can be spirocyclic bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds but have the prefix spirocyclo. Answer the following question   The number of atoms in each bridge are A. `[3.2.1]`B. `[3.1.0]`C. `[1.3.0]`D. `[2.1.0]`

Accepted Answer

NA

Question 26

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1234....from one end of chain to the other in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical indicate this by the use of prefixes di tri tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3)` The molecular weight of following compound is 37-Diethyl-22-dimethyl-4-propylnonane -A. 230B. 236C. 254D. 240

Accepted Answer

NA

Explore topic-wise InterviewSolutions in .

The hyrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is :A. 4,4-dimethylpenteneB. 2,2-dimenthyl-3-penteneC. Isopropyl-2-buteneD. 2,2-dimethyl-4-pentene

`IUPAC` name of the compound A. `2`-Chlorocarbonyl ethylbenzene carboxylateB. `2`-Carboxyethylbenzoyl chlorideC. Ethyl `2`-(chlorocarbonyl)benzenecarboxylateD. Ethyl `1`-(chlorocarbonyl)benzenecarboxylate

The number of possible primary alcohols with the molecular `C_(4)H_(10)O` is:A. 1B. 2C. 3D. 4

The correct `IUPAC` name of the compound A. `2`-Phenoxycarbonylbenzenecarboxylic acidB. Phenyl-`2`-carboxybenecarboxylateC. `2`-Benzoyloxybenzenecarboxylic acidD. `2`-Benzyloxycarbonylbenzenecarboxylic acid

Which of the following can be the isomer(s) of `C_(8)H_(8)O`:A. B. C. D.

Isomers have essentially identical.A. Structural formulaB. Chemical propertiesC. Molecular formulaD. Physical properties

What is the correct relationship between the following compounds? `CH_(3)-CH_(2)-undersetunderset(CH_(3))(|)(CH)-CH_(2)-CH_(3),CH_(3)-CH_(2)-CH_(2)-CH_(2)-undersetunderset(CH_(3))(|)(CH_(2))`A. Chain isomersB. Position isomersC. Functional isomersD. Identical

There are three isomeric compounds `P,Q,R` with molecular formula `C_(4)H_(6)O_(3)`.Compound `P` is a saturated hydroxy carboxylic acid.Compound `Q` is a symmetrical anhydride while `R` is an aldehydic ester. Which of the following is `P`?A. B. C. D.

Compound with same molecular formula but different structure formula are called:A. IsomersB. IsotopesC. IsobarsD. Isoelectric

Which is the structure of pyrrole?A. B. C. D.

The `IUPAC` name of `CH_(3)COCH(CH_(3))_(2)` isA. isopropyl methyl ketoneB. 2-methyl-3-butanoneC. 4-methylisopropyl ketoneD. 3-methyl-2-butanone

The `IUPAC` name of `C_(6)H_(5)CH=CH-COOH` is `:`A. Succinic acidB. 3-phenylprop-2-en-1-oic acidC. Mandelic acidD. Cinnamic acid

The name (s) of the following compound is , `(CH_(3))_(2)CHCN`A. 2-Methyl propane nitrileB. Isobutyro nitrileC. Isopropyl cyanideD. None of these

The names(s) of the following compound is : `underset(CH(OH)COOH)underset(|)(CH(OH)COOH)`A. tartaric acidB. 2,3-dihydroxy butane-1,4-dioic acidC. `alphaalpha`-dihydroxy succinic acidD. None of these

Match the following the compounds of column I with column II. `{:(,"Column-I",,"Column-II",),((A),C_(n)H_(2n+2),(p),"Alkynes",),((B),C_(n)H_(2n),(q),"Alkenes",),((C),C_(n)H_(2n-2),(r),"Cyclohexane",),((D),C_(6)H_(12),(s),"Paraffins or alkanes",):}`

Match the following the compounds of column I with column II. `{:(,"Column-I",,"Column-II",),((A),"Wood spirit",(p),2-"Butyne",),((B),"Acetone",(q),"Trichloromethane",),((C),"Dimethyl acetylene",(r),"Methanol",),((D),"Chloroform",(s),"Propanone",):}`

Match column I with column II and select the correct answer from the given codes :

151.	The hyrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is :A. 4,4-dimethylpenteneB. 2,2-dimenthyl-3-penteneC. Isopropyl-2-buteneD. 2,2-dimethyl-4-pentene
Answer» Correct Answer - A

152.	`IUPAC` name of the compound A. `2`-Chlorocarbonyl ethylbenzene carboxylateB. `2`-Carboxyethylbenzoyl chlorideC. Ethyl `2`-(chlorocarbonyl)benzenecarboxylateD. Ethyl `1`-(chlorocarbonyl)benzenecarboxylate
Answer» Correct Answer - C

153.	The number of possible primary alcohols with the molecular `C_(4)H_(10)O` is:A. 1B. 2C. 3D. 4
Answer» Correct Answer - B

154.	The correct `IUPAC` name of the compound A. `2`-Phenoxycarbonylbenzenecarboxylic acidB. Phenyl-`2`-carboxybenecarboxylateC. `2`-Benzoyloxybenzenecarboxylic acidD. `2`-Benzyloxycarbonylbenzenecarboxylic acid
Answer» Correct Answer - A

155.	Which of the following can be the isomer(s) of `C_(8)H_(8)O`:A. B. C. D.
Answer» Correct Answer - B::C::D

156.	There are three isomeric compounds `P,Q,R` with molecular formula `C_(4)H_(6)O_(3)`.Compound `P` is a saturated hydroxy carboxylic acid.Compound `Q` is a symmetrical anhydride while `R` is an aldehydic ester. Which of the following is the metamer of `Q`?A. `CH_(3)-oversetoverset(O)(\|\|)(C)-O-oversetoverset(O)(\|\|)(C)-CH_(3)`B. `H-oversetoverset(O)(\|\|)(C)-O-oversetoverset(O)(\|\|)(C)-CH_(2)-CH_(3)`C. `H-oversetoverset(O)(\|\|)(C)-O-CH_(2)-oversetoverset(O)(\|\|)(C)-CH_(3)`D. `CH_(3)-O-oversetoverset(O)(\|\|)(C)-oversetoverset(O)(\|\|)(C)-OCH_(3)`
Answer» Correct Answer - B

157.	Isomers have essentially identical.A. Structural formulaB. Chemical propertiesC. Molecular formulaD. Physical properties
Answer» Correct Answer - C

158.	What is the correct relationship between the following compounds? `CH_(3)-CH_(2)-undersetunderset(CH_(3))(\|)(CH)-CH_(2)-CH_(3),CH_(3)-CH_(2)-CH_(2)-CH_(2)-undersetunderset(CH_(3))(\|)(CH_(2))`A. Chain isomersB. Position isomersC. Functional isomersD. Identical
Answer» Correct Answer - A Carbon skeleton is different in both compounds.

159.	There are three isomeric compounds `P,Q,R` with molecular formula `C_(4)H_(6)O_(3)`.Compound `P` is a saturated hydroxy carboxylic acid.Compound `Q` is a symmetrical anhydride while `R` is an aldehydic ester. Which of the following is `P`?A. B. C. D.
Answer» Correct Answer - D

160.	Compound with same molecular formula but different structure formula are called:A. IsomersB. IsotopesC. IsobarsD. Isoelectric
Answer» Correct Answer - A

161.	Which is the structure of pyrrole?A. B. C. D.
Answer» Correct Answer - A

162.	The `IUPAC` name of `CH_(3)COCH(CH_(3))_(2)` isA. isopropyl methyl ketoneB. 2-methyl-3-butanoneC. 4-methylisopropyl ketoneD. 3-methyl-2-butanone
Answer» Correct Answer - D

163.	The `IUPAC` name of `C_(6)H_(5)CH=CH-COOH` is `:`A. Succinic acidB. 3-phenylprop-2-en-1-oic acidC. Mandelic acidD. Cinnamic acid
Answer» Correct Answer - B::D

164.	The name (s) of the following compound is , `(CH_(3))_(2)CHCN`A. 2-Methyl propane nitrileB. Isobutyro nitrileC. Isopropyl cyanideD. None of these
Answer» Correct Answer - A::B::C

165.	The names(s) of the following compound is : `underset(CH(OH)COOH)underset(\|)(CH(OH)COOH)`A. tartaric acidB. 2,3-dihydroxy butane-1,4-dioic acidC. `alphaalpha`-dihydroxy succinic acidD. None of these
Answer» Correct Answer - A::B::C

166.	Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(\|)overset(CH_(3))overset(\|)(C)-underset(CH_(3))underset(\|)(CH)-overset(CH_(3))overset(\|)(CH)-CH_(2)-CH_(3)` THe correct IUPAC name of the following compound is - `CH_(3)-CH_(2)-CH_(2)-underset(CH_(3))underset(\|)underset(CH-CH_(3))underset(\|)(CH)-CH_(2)-CH_(2)-underset(CH_(3))underset(\|)(CH)-CH_(3)`A. 2-Methyl-5-isopropyloctaneB. 2,6-Dimethyl-5-propylheptaneC. 5-isopropyl-2-MethylocataneD. 4-(1-Methylethyl)-7-methylocatane
Answer» Correct Answer - A

167.	Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(\|)overset(CH_(3))overset(\|)(C)-underset(CH_(3))underset(\|)(CH)-overset(CH_(3))overset(\|)(CH)-CH_(2)-CH_(3)` The IUPAC name of the compound is ? `CH_(3)-CH_(2)-underset(CH_(3))underset(\|)(CH)-overset(CH_(3)-CH-CH_(2)-CH_(2)-CH_(3))overset(\|)(CH)-underset(CH_(2)-CH_(3))underset(\|)(CH)-CH_(2)-CH_(3)`A. 5-Ethyl-3-Methyl-4-(1-Methylpropyl) octaneB. 4-Ethyl-6-Methyl-5-(1-Methylpropyl) octaneC. 3-Ethyl-5-Methyl-4-(1-Methylpropyl) octaneD. 4-sec-butyl-5-Ethyl-5-Methyleptane
Answer» Correct Answer - C

168.	Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(\|)overset(CH_(3))overset(\|)(C)-underset(CH_(3))underset(\|)(CH)-overset(CH_(3))overset(\|)(CH)-CH_(2)-CH_(3)` The correct lowest set of locant is :-A. 3,3,4,5B. 3,4,5,5C. 4,5,3,3D. 5,5,4,3
Answer» Correct Answer - A

169.	Match the following the compounds of column I with column II. `{:(,"Column-I",,"Column-II",),((A),C_(n)H_(2n+2),(p),"Alkynes",),((B),C_(n)H_(2n),(q),"Alkenes",),((C),C_(n)H_(2n-2),(r),"Cyclohexane",),((D),C_(6)H_(12),(s),"Paraffins or alkanes",):}`
Answer» Correct Answer - A-(s),B-(q,r),C-(p),D-(q,r)

170.	Match the following the compounds of column I with column II. `{:(,"Column-I",,"Column-II",),((A),"Wood spirit",(p),2-"Butyne",),((B),"Acetone",(q),"Trichloromethane",),((C),"Dimethyl acetylene",(r),"Methanol",),((D),"Chloroform",(s),"Propanone",):}`
Answer» Correct Answer - A-(r ),B-(s),C-(p),D-(q)

171.	Match column I with column II and select the correct answer from the given codes :
Answer» Correct Answer - A-(q),B-(r ),C-(s),D-(p)

172.	Comprehension # 2 In addition to the standar ring systems (such as cyclohexane), cyclic compounds can also be bicylic tricylic, etc. or they can be spirocyclic, bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings, but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds, but have the prefix spirocyclo. Answer the following question : what is the IUPAC name of the above compound ?A. cyclo[1.2.2]heptaneB. Bicycl [1.2.2]heptaneC. Bicyclo [2.2.1]heptaneD. cyclo[2.2.1]heptane
Answer» Correct Answer - (C )

173.	Comprehension In addition to the standar ring systems (such as cyclohexane), cyclic compounds can also be bicylic tricylic, etc. or they can be spirocyclic, bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings, but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds, but have the prefix spirocyclo. Answer the following question : Which of the following is the correct structure of bicyclo `[1.1.0]` butane?A. B. C. D.
Answer» Correct Answer - (A)

174.	Comprehension # 2 In addition to the standar ring systems (such as cyclohexane), cyclic compounds can also be bicylic tricylic, etc. or they can be spirocyclic, bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings, but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds, but have the prefix spirocyclo. Answer the following question : Select the correct statements about the following compounds : A. It is a tricyclic compoundB. It is bicyclo compoundC. It is spiro compoundD. Its IUPAC name is bicyclo [2.2.2] hexane
Answer» Correct Answer - (B)

175.	Comprehension # 2 In addition to the standar ring systems (such as cyclohexane), cyclic compounds can also be bicylic tricylic, etc. or they can be spirocyclic, bicyclic or bridge head carbons. The point of attachment of two rings are called bridge head atoms. The formal names of bicyclic and related ring system are based on (a) Total number of atoms in the molecule. (b) The number of atoms in each bridge connecting the bridge head atoms. These number are written square bracket in decreasing order. Spirocyclic compounds have two fused rings, but only one bridge head atom. Spirocyclic compounds and named like bicyclic compounds, but have the prefix spirocyclo. Answer the following question : , The number of atoms in each bridge are :A. `[3.2.1]`B. `[3.1.0]`C. `[1.3.0]`D. `[2.1.0]`
Answer» Correct Answer - (B)

176.	Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound `CH_(3)-CH_(2)-underset(CH_(3))underset(\|)overset(CH_(3))overset(\|)(C)-underset(CH_(3))underset(\|)(CH)-overset(CH_(3))overset(\|)(CH)-CH_(2)-CH_(3)` The molecular weight of following compound is 3,7-Diethyl-2,2-dimethyl-4-propylnonane :-A. 230B. 236C. 254D. 240
Answer» Correct Answer - C