Assertion (A): Gas bubbles are observed when sodium carbonate is adde...
Sodium carbonate reacts with excess hydrochloric acid to form sodium chloride, water and carbon dioxide. In this reaction, bubbles of carbon dioxide are observed.
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Assertion (A): Gas bubbles are observed when sodium carbonate is adde...
Assertion (A): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.
Reason (R): Carbon dioxide is given off in the reaction.
The correct answer is option 'A': Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Explanation:
When sodium carbonate (Na2CO3) is added to dilute hydrochloric acid (HCl), a reaction takes place resulting in the formation of carbon dioxide (CO2) gas. This reaction is represented by the following chemical equation:
Na2CO3 + 2HCl → 2NaCl + H2O + CO2
This reaction is a type of double displacement reaction, where sodium carbonate reacts with hydrochloric acid to produce sodium chloride, water, and carbon dioxide gas.
Now, let's analyze the given assertion and reason:
Assertion (A): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.
This assertion is true. When sodium carbonate is added to dilute hydrochloric acid, effervescence occurs, and gas bubbles are observed. This is evident in the reaction mentioned above, where carbon dioxide gas is produced.
Reason (R): Carbon dioxide is given off in the reaction.
This reason is also true and it explains why gas bubbles are observed. During the reaction between sodium carbonate and hydrochloric acid, carbon dioxide gas is given off as a product. This gas evolution leads to the formation of gas bubbles.
Hence, both the assertion and reason are true, and the reason correctly explains the occurrence of gas bubbles. Therefore, the correct answer is option 'A': Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Assertion (A): Gas bubbles are observed when sodium carbonate is adde...
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