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Carbohydrates are large molecules with the molecular formula C\(_x\)(H\(_2\)O)\(_y\). In which of the following pairs...

Chemistry
JAMB 2012

Carbohydrates are large molecules with the molecular formula C\(_x\)(H\(_2\)O)\(_y\). In which of the following pairs is x not equal to y?

  • A. glucose and starch
  • B. maltose and starch
  • C. sucrose and fructose
  • D. galactose and starch
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Correct Answer: Option B
Explanation

Glucose = C\(_6\)(H\(_2\)O)\(_6\)

= C\(_6\)H\(_{12}\)O\(_6\)

Maltose = C\(_{12}\) (H\(_2\)O)\(_{11}\)

= C\(_{12}\)H\(_{22}\)O\(_{11}\)

Starch = C\(_6\) (H\(_2\)O)\(_5\)

= C\(_6\)H\(_{10}\)O\(_5\)

Sucrose = C\(_{12}\) (H\(_2\)O)\(_{11}\)

= C\(_{12}\)H\(_{22}\)O\(_{11}\)

Fructose = C\(_6\)(H\(_2\)O)\(_6\)

= C\(_6\)H\(_{12}\)O\(_6\)

 

There is an explanation video available below.


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Explanation Video

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709