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Asked: 2021-12-08T10:58:39+00:00 In:

Which gas is evolved, when hydrochloric acid is added in the first test tube containing small pieces of marble and then in second test tube containing zinc granules?

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Poll Results

0%[A] H₂ is first test tube, O₂ in the second test tube
100%[B] CO₂ in the first test tube, H₂ in the second test tube ( 2 voters )
0%[C] O₂ in the first test tube, Cl₂ in the second test tube
0%[D] Cl₂ in the first test tube, CO₂ in the second test tube
Based On 2 Votes

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In first test tube, the following reaction involves:
CaCO₃ + 2HCl → CO₂ + H₂O + CaCl₂
CO2 gas is evolved here.
In second test tube, the following reaction takes place:
Zn + 2HCl → ZnCl + H₂ (here H₂ gas is evolved).

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    1 Answer

    1. [B] CO₂ in the first test tube, H₂ in the second test tube

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