Question

solution of activity 2.3 of 10th class.

Answer 1

In the said activity, the reaction between metals and dilute acids leading to the formation of metal salts and hydrogen gas has been shown. When dilute sulphuric acid is added to zinc granules, zinc sulphate and hydrogen gas are formed. This hydrogen gas when passed through soap solution causes the agitation of the mixture resulting in the formation of bubbles. Moreover, as particles of soap are already interacting with water, they do not react with hydrogen gas. Bubbling of gas thus results in the formation of bubbles and any particular chemical reaction between the two does not take place.


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by Sujeet yaduvanshi

Answer 2

Answer:

Activity 2.3 NCERT Class 10 Science, Chapter 2 Acids, Bases, and Salts. Brief procedure: Activity 2.3 asks us to react zinc granules with various acids and observe the flammability of gas formed. Observation: ... Zinc also react with weak acids like acetic acid, but here gas formation is slow.

Explanation:

Zinc reacts with acids and forms its salt and hydrogen gas. Hydrogen gas liberates as the bubble. When we bring the flame to this gas, it burns as hydrogen is highly flammable.

For example

Zn + H2SO4 ———> ZnSO4 + H2

Weak acid does not dissociate quickly in water. So its reaction with zinc is slower as compared to strong acids like Hydrochloric acid and sulphuric acid.

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