6 Questions
The reaction H2 + Cl2 -> 2HCl represents which type of reaction?
Combination
What is the color of the solution obtained when crystals of copper sulphate are dissolved in water?
Blue
When dilute HCl is added to zinc pieces in a test tube, what happens?
Small bubbles of H2 gas appear on the surface of zinc pieces
How many molecules of ozone (O3) are required for every one molecule of PbS in the reaction where PbS reacts with ozone and forms PbSO4?
4
What is chemically rust?
Hydrated ferric oxide
Which of the following reactions is not correct?
(Need to provide incorrect reaction a)
Test your knowledge of chemical reactions and equations with these important one-mark questions from CBSE Class 10 Science. From identifying the color of solutions to understanding the reactions of zinc with dilute HCl, this quiz covers key concepts from the chapter.
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