Question

An element X reacts with a substance Y and the resultant substance turns red litmus paper to blue. A colourless and odourless gas is released from the texture and when a burning matchstick is brought near the mouth of the test tube, a pop sound is observed. Name X and Y.

Answer 1

Answer:

i guess it should be Na + 2H2O

Explanation:

2Na + 2H2O=2NaOH+H2

Answer 2

Answer:

I think X is a metal and Y is HCl or any acid as metal reacts with acid, hydrogen gas is evolved. Hydrogen gas burns with a Pop sound