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Q.

The IUPAC name of HOOC - CH = CH - COOH is:

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a

But-2-ene-1, 4-dicarboxylic acid

b

Ethene dioic acid

c

But-2-ene-1, 4-dioic acid

d

Ethene dicarboxylic acid

answer is B.

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Detailed Solution

Carboxylic acidCarboxy(oic acid)-oic acid
-carboxylic acid
Acid anhydride--oic anhydride
- carboxylic anhydride 
Carboxylic esterAlkoxycarbonyl-oate
-carboxylate
AmideAmido-amide
-carboxamide
nitrilecyano-nitrile(keep “e”)
-carbonitrile
AldehydeOxo-al
-carbaldehyde
KetoneOxo-one
AlcoholHydroxy-ol
AmineAmino-amine
AlkeneEnyl-ene
AlkyneYnyl-yne
AlkylYl-ane

The order when multi-functional group is present is that we have to follow the following priority order. Remaining rules like long chain rule and least sum rule must also be obeyed.

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