activity 2.4 in ncert text
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Answer:
Activity 2.4 NCERT Class 10 Science, Chapter 2 Acids, Bases, and Salts.
Procedure: Activity 2.4 asks us to treat zinc granule with bases like sodium hydroxide. Observation: Bubbles come out from zinc granule which burns with a flame. Explanation: Just like a metal reacts with acid (see Activity 2.3), metal also react to bases and produce hydrogen gas. Here, zinc reacts with sodium hydroxide and form oxide of zinc with the evolution of hydrogen. The reaction is vigorous. So we use dilute bases to moderate the reaction. Zn(s) + 2NaOH(aq) ———-> Na2ZnO2(s) + H2(g)
Next: Reaction of metal carbonates and hydrogen carbonates with acid. Activity 2.5.
Explanation:
See also: Zinc reaction with acids. Activity 2.3.
Other activities from NCERT class 10 science Chapter 2.