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Item SC101003: Bubbles of gas forming as a seashell is placed in vinegar is an example of a chemical reaction.

Which of the following is an example of a chemical reaction?

  1. A piece of wax melting and forming a liquid
  2. A piece of chalk making white marks on a chalkboard
  3. Bubbles of gas forming when a seashell is placed in vinegar
  4. A powder dissolving in hot water to make hot chocolate
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 3537
6–8
n = 2423
9–12
n = 1094
Male
n = 1661
Female
n = 1802
English
n = 3135
Other
n = 315
A. A piece of wax melting and forming a liquid 18% 19% 16% 19% 18% 17% 27%
B. A piece of chalk making white marks on a chalkboard 9% 9% 9% 12% 7% 9% 13%
C. Bubbles of gas forming when a seashell is placed in vinegar 53% 51% 59% 52% 55% 55% 40%
D. A powder dissolving in hot water to make hot chocolate 19% 21% 16% 18% 21% 19% 20%