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The group of heterocyclic compound is:
(A). Phenol, furan
(B). Furan, thiophene
(C). Thiophene, phenol
(D). Furan, aniline

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Last updated date: 13th Jun 2024
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Answer
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Hint:Heterocyclic chemistry is the branch of the organic chemistry dealing with the synthesis, properties and the applications of the heterocycles. A heterocyclic compound defines a cyclic compound having atoms of at least two different elements as members of its rings.

Complete step by step answer:
A heterocyclic compound is a compound that is cyclic and has atoms of two different elements as members of its ring.
Examples of heterocyclic compounds are: nucleic acids, drugs, natural or synthetic dyes.
Heterocyclic compounds have very much importance in our daily life. These compounds can be cyclic or non-cyclic one.
Heterocyclic compounds have many uses:
I. Used as pharmaceuticals
II. As agrochemicals.
III. As veterinary products
IV. Have applications in sanitizers, developers, antioxidants, dye stuff, copolymers.
V. Used as vehicles in synthesis of other organic compounds.
VI. Some of the natural products like antibiotics.
Phenol has one hydroxyl group outside the carbon ring. So, it is not a heterocyclic compound.
Aniline also has one nitrogen atom outside the carbon ring. That’s why aniline is also not a heterocyclic compound.
Furan has one oxygen atom but inside the ring. The structure of furan is
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Thiophene is also a heterocyclic compound with the chemical formula ${C_4}{H_4}S$
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So, option (B) is correct.

Additional information: The heterocycles having three atoms in the ring are usually higher in energy and are more reactive. The heterocyclic compounds having one heteroatom are generally stable and those with two heteroatoms are more likely to occur as reactive intermediates. Moreover, these compounds are used in many areas of life sciences and many drugs are these compounds.

Note:
Heterocyclic compounds play an important role in metabolism of the living cells. The heterocyclic compound of nitrogen, oxygen and sulphur are used for biological aspects.