The impurities formed during the laboratory preparation of chlorine gas are removed by
H2O
NH3
H2SO4
HCl
Explanation
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Chlorine gas is passed through water to remove any gaseous HCl that may be present after it is synthesized.
Option A refers to H2O (water). In the context of chlorine gas preparation, water is not typically used to remove impurities. While water can be used to wash the gas and remove any soluble impurities, it's not effective at removing all types of impurities.
In contrast, sulfuric acid (H2SO4), as mentioned, is a strong dehydrating agent and can effectively remove water vapor and other gaseous impurities. Therefore, H2SO4 is generally preferred for this purpose over water. So, the answer remains C. H2SO4.
The correct answer is: C. H₂SO₄
Explanation:
In the laboratory preparation of chlorine gas, impurities such as moisture and hydrogen chloride (HCl) are removed using concentrated sulfuric acid (H₂SO₄) because of its strong dehydrating properties.
H₂SO₄ effectively dries the chlorine gas by removing any water vapor, ensuring pure and dry chlorine gas is collected.
Other options like H₂O (A), NH₃ (B), and HCl (D) are either not dehydrating agents or would react undesirably with chlorine.
Hydrogen re react wit chlorine wil make chlorine 8 in d outer most shel so it cm nt react.ans is nt A
heating MnO₂ with concentrated HCl), the gas produced is not pure. It contains two main impurities:
Hydrogen chloride (HCl) gas
Water vapour (moisture)
How the impurities are removed (step by step):
Passing the gas through water (H₂O)
This removes HCl gas, because HCl is highly soluble in water.
Passing the gas through concentrated sulfuric acid (H₂SO₄)
This removes moisture (water vapour) by drying the gas.
Evaluating the options:
A. H₂O → removes HCl impurity ✔️
B. NH₃ → reacts with chlorine (not used) ❌
C. H₂SO₄ → removes water vapour (drying agent) ✔️
D. HCl → adds impurity, not removes ❌
✅ Correct answer (as commonly expected in exams):
C. H₂SO₄
📌 Note: If the question allowed multiple steps, the correct process would involve both H₂O and H₂SO₄, but when one option is required, concentrated H₂SO₄ is the standard answer.
