Name a gas which turns:
Acidified potassium dichromate solution green

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Solution

1. The gas is Sulphur Dioxide, $S O_{2}$ .
2. Sulphur Dioxide, $S O_{2}$ , gas turns acidified Potassium Dichromate ( $K_{2} C r_{2} O_{7}$ ) solution/paper green from orange.
$K_{2} C r_{2} O_{7} + H_{2} S O_{4} + 3 S O_{2} \to C r_{2} {(S O_{4})}_{3} + K_{2} S O_{4} H_{2} O$
Chromium(III)Sulphate
3. Sulphur Dioxide, $S O_{2}$ , can also turn lime water milky.

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Name a gas which turns: Acidified potassium dichromate solution green

1. The gas is Sulphur Dioxide,SO2. 2. Sulphur Dioxide,SO2 , gas turns acidified Potassium Dichromate (K2Cr2O7) solution/paper green from orange. K2Cr2O7+H2SO4+3SO2→Cr2(SO4)3+K2SO4H2O Chromium(III)Sulphate 3. Sulphur Dioxide,SO2 , can also turn lime water milky.

Name a gas which turns:
Acidified potassium dichromate solution green