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Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
Classify the following as physical or chemical properties. Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
  • ✓
    Chemical
  • B
    Physical
  • C
    Both $A$ and $B$
  • D
    None of these
✓

Answer

Correct option: A.
Chemical

It is a chemical property as electron exchange takes place and new compound forms in this reaction.
$Zn + 2HCl → ZnCl_2​+ H_2$​

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