Which of the following demonstrates a chemical reaction of water?
Water boils to produce steam at 100° C (252)
Water Dissolves sugar
Water produces gas with sodium metal
Water and all separate when combined
Correct Answer : C
a. Water boils to produce steam at 100°C - This is a phase change (from liquid to gas) and not a chemical reaction of water.
b. Water dissolves sugar - This is a physical change, not a chemical reaction of water.
c. Water produces gas with sodium metal - This reaction involves the chemical reaction of water with sodium metal to produce hydrogen gas.
d. Water and oil separate when combined - This is a physical separation, not a chemical reaction of water.
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