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GK QUESTION#3216

What are the products when a reactive metal such as zinc reacts with dilute hydrochloric acid?

  1. Ahydrogen gas and saltCorrect answer
  2. Bcarbon dioxide, salt and water
  3. Csalt and water
  4. Dcarbon dioxide, salt and hydrogen gas
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Answer

A. hydrogen gas and salt

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Explanation

A reactive metal above hydrogen in the activity series reacts with a dilute non-oxidising acid such as hydrochloric acid to give a salt and hydrogen. For example, Zn + 2HCl → ZnCl₂ + H₂. The conditions exclude the source wording’s overgeneralisation to every metal and acid.

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