JAMB 2016 Chemistry · Question 45

The ability of carbon to form long chains is referred to as

Options

  1. A.Alkylation
  2. B.Acylation
  3. C.Carbonation
  4. D.Catenation

Answer: D. Catenation

Explanation written with AI and checked against the answer key

1. Analyze the question

The question asks for the specific term used to describe the unique chemical property of carbon atoms to bond with other carbon atoms to form long, stable chains, branched structures, or rings.

2. Explain the concept

In organic chemistry, carbon is unique because of its electronic configuration (1s22s22p21s^2 2s^2 2p^2). It has four valence electrons, allowing it to form four strong covalent bonds. Because the carbon-carbon (C-C) bond is very strong and stable, carbon atoms can link together repeatedly. This phenomenon is fundamental to the existence of the millions of organic compounds found in nature, including plastics, proteins, and DNA.

  • Alkylation is the transfer of an alkyl group from one molecule to another.
  • Acylation is the process of adding an acyl group to a compound.
  • Carbonation is the process of dissolving carbon dioxide in a liquid (like in soft drinks).
  • Catenation is the specific term for the self-linking property of atoms of the same element to form chains.
3. Show the solution
  • Step 1: Identify the definition of the property described. The ability to form long chains is the definition of catenation.
  • Step 2: Evaluate the options. • A, B, and C describe chemical reactions or processes, not a structural property of an element. • D (Catenation) is the scientific term for the self-linking property of carbon.
4. Identify the answer

The correct option is D.

5. Tip

Memory Trick: Think of the word "Chain". Catenation starts with "Cat-", which sounds like the beginning of "Chain". Remember: Carbon = Catenation = Chains. This property is why organic chemistry is such a vast field of study!

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