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Question

In organic compounds, the acyclic or open series compounds are also called __________________.

This question was previously asked in
RPF SI 2018 Question Paper PDF (10-Jan-2019) (Shift 1)
The correct answer is

Elephantic compounds

Organic compounds are classified as open-chain (acyclic) and closed-chain (cyclic) compounds.

Open-chain or acyclic compounds, in which carbon atoms are joined in straight or branched chains, are called aliphatic compounds. 'Elephantic' in the option is a mistranslation of aliphatic.

Examples are methane, ethane, propane, ethene and acetic acid. 'Scented compounds' stands for aromatic compounds, which are cyclic compounds with a benzene-type ring, so they are not open-chain.

Hence, the answer is Elephantic compounds (aliphatic compounds).

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