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Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
Mohan Is Writing Some Sentences, Choose The Sentences Which Is Or Are Incorrect One:
  • A
    When carbon dioxide is passed through lime water, it turns milky due to the formation of calcium carbonate.
  • ✓
    The chemical name of baking soda is calcium carbonate.
  • C
    Two methods by which rusting of iron can be prevented are painting and galvanization.
  • D
    When a candle burns both physical and chemical change take place.
✓

Answer

Correct option: B.
The chemical name of baking soda is calcium carbonate.
The chemical name of baking soda is sodium hydrogen carbonate. Here, all the statements are correct except option $[B].$ Hence

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