(A) According to the $IUPAC$ priority rules for functional groups,the order of priority is: $1$. Acid halides $(-COCl)$ $2$. Amides $(-CONH_2)$ $3$. A

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(A) According to the $IUPAC$ priority rules for functional groups,the order of priority is: $1$. Acid halides $(-COCl)$ $2$. Amides $(-CONH_2)$ $3$. Aldehydes $(-CHO)$ $4$. Alcohols $(-OH)$ Therefore,the correct decreasing order is $-COCl > -CONH_2 > -CHO > -OH$.

Class 11 Chemistry 8-1.Organic Chemistry : Classification and Nomenclature of Organic compounds Nomenclature of organic compounds

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The correct decreasing order of priority for the functional groups of organic compounds in the $IUPAC$ system of nomenclature is:

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A
$-COCl > -CONH_2 > -CHO > -OH$
B
$-CONH_2 > -CHO > -COCl > -OH$
C
$-COCl > -CHO > -CONH_2 > -OH$
D
$-CHO > -CONH_2 > -COCl > -OH$

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8-1.Organic Chemistry : Classification and Nomenclature of Organic compounds

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Nomenclature of organic compounds

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What is the $IUPAC$ name of propylene glycerol?

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Match the acids given in Column-$I$ with their correct $IUPAC$ names given in Column-$II$.

Column-$I$ (Acids) Column-$II$ ($IUPAC$ name)

$A$. Phthalic acid $1$. Hexane$-1,6-$dioic acid

$B$. Oxalic acid $2$. Benzene$-1,2-$dicarboxylic acid

$C$. Succinic acid $3$. Pentane$-1,5-$dioic acid

$D$. Adipic acid $4$. Butane$-1,4-$dioic acid

$E$. Glutaric acid $5$. Ethane$-1,2-$dioic acid

Column-$I$ (Acids)	Column-$II$ ($IUPAC$ name)
$A$. Phthalic acid	$1$. Hexane$-1,6-$dioic acid
$B$. Oxalic acid	$2$. Benzene$-1,2-$dicarboxylic acid
$C$. Succinic acid	$3$. Pentane$-1,5-$dioic acid
$D$. Adipic acid	$4$. Butane$-1,4-$dioic acid
$E$. Glutaric acid	$5$. Ethane$-1,2-$dioic acid