Magnesium ribbon burns with a dazzling white flame and changes into a white powder as shown in the diagram. The powder is dissolved in water. Identify the chemical formula of the white powder and the correct change observed when the solution is tested with litmus paper.
Magnesium ribbon burns with a dazzling white flame and changes into a white powder as shown in the diagram. The powder is dissolved in water. Identify the chemical formula of the white powder and the correct change observed when the solution is tested with litmus paper.
Options
Official answer
The chemical formula of the white powder is MgO. When the solution is tested with litmus paper, it turns red litmus blue.
Marking scheme
- 1.MgO
- 2.turns red litmus blue
Hint
The diagram shows that magnesium ribbon burns with a dazzling white flame and changes into a white powder. The powder is dissolved in water. The chemical formula of the white powder is MgO. When the solution is tested with litmus paper, it turns red litmus blue.
Quick oral answer
The chemical formula of the white powder is MgO. When the solution is tested with litmus paper, it turns red litmus blue.
Common mistakes
- 1.MgO2
- 2.turns blue litmus red
Analysis and explanation
The diagram shows that magnesium ribbon burns with a dazzling white flame and changes into a white powder. The powder is dissolved in water. The chemical formula of the white powder is MgO. When the solution is tested with litmus paper, it turns red litmus blue.
Interesting facts
Magnesium ribbon burns with a dazzling white flame and changes into a white powder.
The powder is dissolved in water.
The chemical formula of the white powder is MgO.
When the solution is tested with litmus paper, it turns red litmus blue.
Question details
Q19 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2026
- Section
- Section B
- Marks
- 1
- Type
- MCQ
- Chapter
- Chemical Reactions and Equations
- Topic
- Chemical Reactions and Equations
- Bloom's level
- Knowledge
- 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 1 mark 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 MCQ question from Section B in the CBSE Class 10 Science 2026 paper.