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A primary alkanol has a molecular mass of 60. What is the structural formula of...

Chemistry
WAEC 2017

A primary alkanol has a molecular mass of 60. What is the structural formula of the compound? [C= 12.0, H= 1.0, O= 16.0)

 



 

  • A. A
  • B. B
  • C. C
  • D. D
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Correct Answer: Option B
Explanation

Alkanols have the formula \(C_{n}H_{2n+1}OH\).

⇒  \( 12n + (1\times (2n+1)) + 16.0 + 1.0 = 60\)

= (14n +18 = 60\)

\(n = \frac{60-18}{14} = \frac{42}{14} = 3\)

Hence, the alkanol is gotten by putting n=3,

=\(C_{3}H_{7}OH\)


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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