Question detail
For Reactions of acids with metals, which electrolysis focus answer best supports this Unit 4.4 objective: Write word equations for reactions between acids and metals?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reactions of acids
Question
- A. Hydrochloric acid + Magnesium carbonate -> Magnesium chloride + Water + Carbon dioxide - correct electrolysis focus for acid
- B. Wrong electrolysis focus: confuses acid with a nearby Unit 4.4 chemical change idea
- C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for Reactions of acids with metals
- D. Wrong reaction link: does not support Write word equations for reactions between acids and metals
Answer
The correct option is Hydrochloric acid + Magnesium carbonate -> Magnesium chloride + Water + Carbon dioxide - correct electrolysis focus for acid.
Explanation
The correct option is "Hydrochloric acid + Magnesium carbonate -> Magnesium chloride + Water + Carbon dioxide - correct electrolysis focus for acid" because it supports the approved learning objective: Write word equations for reactions between acids and metals. The other options are incorrect or weaker because they are vague, use the wrong Chemistry context, or do not clearly explain the answer for Reactions of acids with metals.
Common mistake
Incorrect Word Equation Formation
Students often write incomplete or incorrect word equations for acid-metal reactions, such as omitting the product or using incorrect terms.
Ensure to include both reactants and products in the equation. For example, when hydrochloric acid reacts with zinc, the correct equation is 'hydrochloric acid + zinc → zinc chloride + hydrogen'.
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