Experiment: Aluminium foil was added to a solution of dilute sulfuric acid.Observation: Bubbles of gas formed and the foil slowly dissolved.Question: Which gas is being evolved?
Correct answer: A. Hydrogen, due to reaction of metal with acid.
- A. Hydrogen, due to reaction of metal with acid.
- B. Oxygen, from aluminum breakdown.
- C. Nitrogen, from sulfuric acid.
- D. Carbon dioxide, from aluminum oxide.
Explanation
The correct answer is Option A: Hydrogen, due to the reaction of the metal with the acid. When aluminium reacts with sulfuric acid, hydrogen gas is evolved. This is a common observation in such reactions. Options B, C, and D are incorrect as oxygen, nitrogen, and carbon dioxide are not the gases typically evolved when aluminium reacts with sulfuric acid.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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