What happens when
(i) potassium iodide solution is added to lead (II) nitrate solution?
(ii) zinc is added to copper (II) chloride solution?
(iii) hydrogen gas is passed over hot copper (II) oxide?
Write balanced chemical equations of the reactions involved in support of your answer.
What happens when
(i) potassium iodide solution is added to lead (II) nitrate solution?
(ii) zinc is added to copper (II) chloride solution?
(iii) hydrogen gas is passed over hot copper (II) oxide?
Write balanced chemical equations of the reactions involved in support of your answer.
Official answer
(i) When potassium iodide solution is added to lead (II) nitrate solution, a yellow precipitate of lead iodide is formed.
(ii) When zinc is added to copper (II) chloride solution, zinc displaces copper from the solution as zinc is more reactive than copper.
(iii) When hydrogen gas is passed over hot copper (II) oxide, copper (II) oxide is reduced to copper as hydrogen is a strong reducing agent.
Marking scheme
- 1.3 marks
Hint
The student needs to recall the chemical properties of the substances involved and the rules for writing balanced chemical equations.
Quick oral answer
The student can be asked to explain the chemical properties of the substances involved and the rules for writing balanced chemical equations.
Common mistakes
- 1.Incorrect balancing of equations
- 2.Incorrect identification of reactants and products
Analysis and explanation
The questions require the student to write balanced chemical equations for the reactions involved. The student needs to identify the reactants and products and balance the equations accordingly.
Interesting facts
Lead iodide is a yellow precipitate
Zinc is more reactive than copper
Hydrogen is a strong reducing agent
Question details
Q26 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2026
- Section
- Section B
- Marks
- 3
- Type
- Short Answer
- Chapter
- Chemical Reactions and Equations
- Topic
- Chemical Reactions and Equations
- Bloom's level
- Applying
- Syllabus topic
- Chemical Reactions and Equations
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2026?
This question carries 3 marks in the CBSE Class 10 Science 2026 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Chemical Reactions and Equations" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Chemical Reactions and Equations" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2026 paper?
This is a Short Answer question from Section B in the CBSE Class 10 Science 2026 paper.