Question

A student prepared hydrogen chloride gas by treating sodium chloride with concentrated sulphuric acid in a test-tube. He held a strip of dry blue litmus paper in HCl gas coming out of the test-tube. The student observed that on coming in contact with HCl gas, the colour of blue litmus paper (1) turned yellow
(2) turned violet
(3) remained blue
(4) turned red

Answer 1

Answer:

4 turned red

Explanation:

this is because hcl gas is acidic in nature