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Consider the reaction represented by the following equation: C\(_2\)H\(_2\) + yH\(_2\) → C\(_2\)H\(_6\). The value...

Chemistry
WAEC 2013

Consider the reaction represented by the following equation: C\(_2\)H\(_2\) + yH\(_2\) → C\(_2\)H\(_6\). The value of y in the reaction is

  • A. 4
  • B. 3
  • C. 2
  • D. 1
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Correct Answer: Option C
Explanation

C\(_2\)H\(_2\) + yH\(_2\) → C\(_2\)H\(_6\)

To balance the equation, we must have 2 carbon atoms on both sides and 6 hydrogen atoms.

On the LHS and RHS, carbon = 2 atoms.

On the LHS, Hydrogen = 2 + 2y.

On the RHS, Hydrogen = 6.

⇒ 2 + 2y = 6

2y = 4

y = 2.


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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
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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