2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube

CBSE Class 10 CBSE Class 10 Science
1

2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation for the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.

2
  1. Zn + 2NaOH → Na2ZnO2 + H2↑
  2. The liberated H2 gas can be detected by putting a burning matchstick at the opening of test tube, it will bum with the pop sound with blue flume.
  3. Zn + 2HCl → ZnCl2 + H2↑