Comprehension Passage
Directions: Question are based on the following passage.
A teacher of Class VIII demonstrates the following activity in her class: “The teacher takes a small amount of sulphur in a spoon and burns it. She then puts the spoon into a tumbler with a lid to ensure that the gas produced does not escape. After a few minutes, she adds water to the tumbler.”
What happens if blue and red litmus paper are put into the tumbler?
1
Red litmus turns blue
2
No change in both.
3
Blue litmus turns red
4
Blue litmus remains blue