Inorganic Chemistry Practice Questions | University Admission Chemistry

University Admission Chemistry Exam

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In a laboratory preparation of hydrogen, zinc reacts with dilute hydrochloric acid. A small amount of copper(II) sulfate solution is added to the reaction mixture. Which statement best explains the effect of adding copper(II) sulfate?

Select one option.

It increases hydrogen yield by supplying additional hydrogen ions.
It accelerates hydrogen evolution by depositing copper on zinc, forming a more effective local cell.
It prevents side reactions by removing chloride ions from solution.
It dries the hydrogen gas by absorbing water vapour.
It neutralizes the acid, making hydrogen evolve more slowly.

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