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The IUPAC name of CH3COOC2H5.
A. Ethyl acetate
B. Ethyl ethanoate
C. Methyl propanoate
D. None of the above

Answer
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Hint: IUPAC gives us some rules for the naming of organic compounds which can also be referred to as nomenclature of organic compounds. IUPAC stands for International Union of Pure and Applied Chemistry.

Complete answer:
Ethyl acetate is the common name of the compound and it can be represented by the molecular formula CH3COOC2H5which can also be shown as:
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IUPAC nomenclature gives us information on writing the name of chemical compounds. There are some general rules for it. To write the name of this compound we have to follow some rules.
a. At first select the longest chain of carbon atoms, in the given compound the longest chain is of 4 carbon atoms from right to left.
b. Now we see there is a carbonyl group present in the compound and the compound represents the formula in the form of RCOOR which represents ester.
c. In the given compound R=CH3 and R=CH2CH3.
d. In this CH2CH3 is named as ethyl and another group is taken along with COOi.e. CH3COO known by the name ethanoate. Hence the IUPAC name of the compound will be ethyl ethanoate.

Hence option B is the correct answer.

Note:
The main aim of the nomenclature IUPAC is to create an international standard for designating compounds to promote communication. The purpose of the system is to give a unique and unambiguous name to each structure so that no two structures' names get mixed or they can be identified easily.
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