A few pieces of zinc were treated with dilute sulphuric acid in a test tube. Which of the following observations is correct? *
It is a physical change and zinc dissolves.
It is a chemical change and zinc dissolves.
It is a chemical change, zinc dissolves and hydrogen gas is evolved.
It is a physical change and hydrogen gas is evolved.
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Explanation:
it is a chemical change , zinc dissolves and H2 gas is evolved
METAL + ACID -------> SALT + H2
Zn + H2SO4 ------------> ZnSO4 +H2
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