Question

1 g of solid sodium chloride is taken in a clean and dry test tube and 2 mL of conc. sulphuric acid is added to it. If the gas evolved is tested first with dry and then with wet blue litmus paper, in which case will the litmus paper change colour ? Give reason for your answer. What inference can be drawn about the nature of the evolved gas ? Support your answer with chemical equation for the reaction.

Answer 1

It will change colour if they react because HCL is formed which is acidic.

Answer 2

REACTION OF CONCENTRATED SALPHURIC ACID WITH SODIUM CHLORIDE .

the reaction of concentrated salphuric acid and sodium chloride is known as a redox reaction

The concentrated salphuric acid usually act as both a reducing agent and an oxidising agent hence it gives sodium chloride an hydrogen ion to produce hydrogen halide