Home » When copper oxide and dilute hydrochloric acid react, colour changes to Acids Bases and Salts MCQs When copper oxide and dilute hydrochloric acid react, colour changes to December 28, 2021 25 Views Q. When copper oxide and dilute hydrochloric acid react, colour changes to whitebluish-greenblue-blackblack Answer: bluish-green
During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to
Sodium hydrogen carbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved?