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Fire: Friend and Foe / Meadow Surprises — English STD 7 — Question

CBSE BoardEnglish MediumSTD 7EnglishFire: Friend and Foe / Meadow Surprises1 Mark
MCQ
A chemical reaction takes place when
  • A
    carbon dioxide combines with
  • B
    oxygen combines with carbon hydrogen
  • C
    oxygen combines with hydrogen
  • ✓
    oxygen combines with carbon and hydrogen
✓

Answer

Correct option: D.
oxygen combines with carbon and hydrogen
oxygen combines with carbon and hydrogen

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