Lab tests

Question 1

Test for Carbon Dioxide

Answer 1

Colorless, odorless gas which turns limewater milky and has no effect on acidified KMnO4 or K2Cr2O7 solution

Question 2

Test for Sulphur Dioxide

Answer 2

Colorless, odorless gas which turns limewater milky, turns acidified KMnO4 from pink to clear colorless and acidified K2Cr2O7 from orange to clear green.

Question 3

Test for nitrogen dioxide

Answer 3

It turns potassium iodide paper brown