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      Question

      Acid reacts with metal to form salt and liberates

      _________ gas.
      A Oxygen Correct Answer Incorrect Answer
      B Hydrogen Correct Answer Incorrect Answer
      C Carbon Dioxide Correct Answer Incorrect Answer
      D Nitrogen Correct Answer Incorrect Answer

      Solution

      • Acid + Metal → Salt + Hydrogen Gas (H₂) • Example: 2HCl+Zn→ZnCl2+H2↑ • Hence, the correct answer is Hydrogen (H₂) gas.

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