Students of class IX are asked to perform some experiments in the laboratory.
1) Meera took a piece of copper in a test tube and added dilute sulphuric acid to it.
2) Zalak took a piece of copper in a test tube and added concentrated sulphuric acid to it.
3) Rehan took a piece of zinc in a test tube and added dilute hydrochloric acid to it.
Think what chemical changes have taken place? Answer the following questions.
Q.1 Meera did not observe anything, Why?
Q.2 Zalak concluded that a chemical change has taken place, what observation led her conclude this?
Q.3 Rehan observed effervescence in the test tube. Why?
Write chemical equation for the reaction taking place.
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Answer:
must refer to vidoe :-)
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