No gas is liberated when the following HX is treated with MnO2 and con. H2SO4

2HCl + H2SO4 + MnO2 → Cl2 + MnSO4 + 2H2O2HBr + MnO2 + H2SO4 → Br2 + MnSO4 + 2H2O Fluoride is the most electronegative element, due to this reason MnO2 and H2SO4 are not able to oxidize fluoride (F) to fluorine (F2).Hence no reaction takes place or no gas is formed.MnO2 + 2HI + H2SO4 → MnSO4 + 2H2O + I2

No gas is liberated when the following HX is treated with MnO2 and con. H2SO4

2HCl + H2SO4 + MnO2 → Cl2 + MnSO4 + 2H2O2HBr + MnO2 + H2SO4 → Br2 + MnSO4 + 2H2O Fluoride is the most electronegative element, due to this reason MnO2 and H2SO4 are not able to oxidize fluoride (F) to fluorine (F2).Hence no reaction takes place or no gas is formed.MnO2 + 2HI + H2SO4 → MnSO4 + 2H2O + I2

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No gas is liberated when the following HX is treated with MnO₂ and con. H₂SO₄

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HCl

HBr

answer is B.

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Detailed Solution

2HCl + H₂SO₄ + MnO₂ → Cl₂ + MnSO₄ + 2H₂O

2HBr + MnO₂ + H₂SO₄ → Br₂ + MnSO₄ + 2H₂O

Fluoride is the most electronegative element, due to this reason MnO₂ and H₂SO₄ are not able to oxidize fluoride (F) to fluorine (F₂).