Question

URGENT!!!!! PLS TELL ME 4 experiments to test for sulphur dioxide gas

Answer 1

simple test for sulphur dioxide is to pass the gas over a piece of filter paper soaked in acidified Na2Cr2O7. The paper goes from an orange colour for the Cr6+ to a green colour for Cr3+. As the oxidation number of chromium is reduced from 6+ to 3+ this clearly indicates a useful property of sulphur dioxide, namely it is a reducing agent. It has found use as an antioxidant, which can help prevent food from spoiling.



 Sulfur dioxide gas turns moist litmus paper from blue to red
and moist universal indicatorpaper to red - it is acidic


Sulfur dioxide gas will put out a lit splint.




Sulfur dioxide gas turns acidified
potassium dichromate(VI) solution from orange to green.
Chromium is reduced from (VI) to (III).

Hope it helps you plz mark as brainliest

Answer 2

one... the smell test
it smells like burning matches 

two...potassium dichromate(VI) test
it changes the colour of potassium dichromate(VI) from orange to green 

three... litmus test
it turns moist litmus paper from blue to red and moist universal indicator paper to red - it is acidic.

four... colour test
its is colourless