A gas when passed through $K_2Cr_2O_7$ and dil. $H_2SO_4$ solution turns it green, the gas is ______. (a) $CO_2$ (b) $NH_3$ (c) $SO_2$ (d) $Cl_2$

A gas when passed through K₂Cr₂O₇ and dil. H₂SO₄ solution turns it green, the gas is ___. (a) CO₂ (b) NH₃ (c)

Question 99 of 119

K_2Cr_2O_7

(a)

CO_2

(b)

NH_3

(c)

SO_2

(d)

Cl_2

Maharashtra MsbshseMaharashtra HSC (MSBSHSE) Board 2017MCQ· 1mImportance★★★★★

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$SO_2$ is a reducing agent that reduces orange dichromate to green $Cr^{3+}$ .

Sulphur dioxide is a good reducing agent. When passed into an acidified (dil. $H_2SO_4$ ) solution of potassium dichromate, it reduces the orange $Cr_2O_7^{2-}$ ion to green $Cr^{3+}$ , while itself being oxidised to sulphate:

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Q.A gas when passed through $K_2Cr_2O_7$ and dil. $H_2SO_4$ solution turns it green, the gas is ______.

Concept understanding — Oxides of Sulphur

Q.A gas when passed through K2Cr2O7K_2Cr_2O_7K2​Cr2​O7​ and dil. H2SO4H_2SO_4H2​SO4​ solution turns it green, the gas is ______.

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Q.A gas when passed through $K_2Cr_2O_7$ and dil. $H_2SO_4$ solution turns it green, the gas is ______.

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