Page 72 - CT&AI_CLasa_7_Part_1

A student is given two test tubes, one containing lime water and the other
containing tap water. He wants to identify the test tube containing lime water
by designing an algorithm based on the reaction of carbon dioxide.
He writes the following steps, but they are not in the correct order:
1. Conclude that the test tube turning milky contains lime water.
2. Pass carbon dioxide gas through both the test tubes.
3. Observe any visible changes in both test tubes.
4. Identify the test tube in which a milky appearance is formed.

Arrange the steps in the correct logical sequence to form a valid algorithm:

(a) 2 3 4 1 (b) 3 2 4 1

(c) 2 4 3 1 (d) 4 2 3 1

70 Computational Thinking-7 (Science)