Which of these is NOT evidence of a chemical reaction? Multiple choice question. An ice cube melts into liquid water. A piece of zinc raises the temperature of an acid as it reacts with it. An iron nail changes to a brownish-orange color. An antacid tablet produces bubbles of gas when placed in water.

Question

Which of these is NOT evidence of a chemical reaction? Multiple choice question. An ice cube melts into liquid water.  A piece of zinc raises the temperature of an acid as it reacts with it.  An iron nail changes to a brownish-orange color.  An antacid tablet produces bubbles of gas when placed in water.

sanjivnk · Answer

The correct answer is:A. An ice cube melts into liquid water.This is a physical change, not a chemical reaction. The ice is changing state from solid to liquid, but its chemical composition remains the same (H2O).The other options involve chemical reactions:B. Zinc reacting with acid is a chemical reaction that releases heat.C. Iron nail changing color suggests oxidation or rusting, a chemical reaction.D. Antacid tablet producing bubbles of gas is a chemical reaction that releases carbon dioxide.

Answered by sanjivnk | 2025-05-29

Answer (1)

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