Which reaction produces a gas?

Type: MCQ • Marks: 1

A. Zn + 2HCl → ZnCl₂ + H₂

B. AgNO₃ + NaCl → AgCl + NaNO₃

C. Fe + CuSO₄ → FeSO₄ + Cu

D. CaO + H₂O → Ca(OH)₂

Class 10th Science

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