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2-methyl prop-1-ene is an isomer of…

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CHEMISTRY

2-methyl prop-1-ene is an isomer of

  • A. 3-methyl but-1-ene
  • B. 2-methyl but-1-ene
  • C. But-2-ene
  • D. Pent-2-ene

QUICK ANSWER…

C

SOLUTION 

Isomers are organic compounds that have the same molecular formula and composition, but different structure.

2-methyl prop-1-ene will contain 4 carbons this is because:

Prop-1-ene = 3 carbons

2-methyl = 1 carbon located at position 2

Therefore, the isomer of 2-methyl prop-1-ene must have 4 carbons.

Now for the right answer to the above question:

  1. Option A is incorrect. 3-methyl but-1-ene has 5 carbons
  2. Option B is incorrect. 2-methyl but-1-ene also has 5 carbons
  3. C is correct. But-2-ene has 4 carbons
  4. D is not the correct answer. Pent-2-ene has 5 carbons.

QUICK TIPS…

You may please note these/this:

  • Drawing the structures will show clearly that option C is the right answer, but there’s no need to waste time when we can clearly and quickly get to the right answer by inspecting each of the options.

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/culled from 2019 JAMB-UTME Chemistry question 5/

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