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Give One Example Each of Which Illustrates the Following Characteristics of a Chemical Reaction: Evolution of a Gas - ICSE Class 8 - Chemistry

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Question

Give one example each of which illustrates the following characteristics of a chemical reaction:

evolution of a gas

Solution

When Zinc reacts with dil. sulphuric acid. Hydrogen gas is evolved, with an effervescence

    Zn  +     `H_2` `SO_4`       `   →`    Zn`SO_4`    +   `H_2`

(zinc)   (dil . sulphuric acid )  (zinc sulphate )   (hydrogen)

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Solution Give One Example Each of Which Illustrates the Following Characteristics of a Chemical Reaction: Evolution of a Gas Concept: Reactivity Series - Metal that Displaces the Metal Ion from the Solution is More Reactive..
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