Chemical Changes, Combustion and Reactions

Subjects
- UMO
  Unicus Mathematics Olympiad (UMO)
  
  Syllabus (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 14, 2026 / Jul 29, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UMO
  
  Olympiad Preparation
  
  FAQs
  USO
  Unicus Science Olympiad (USO)
  
  Syllabus (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 11, 2026 / Jul 25, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About USO
  
  Olympiad Preparation
  
  FAQs
  UEO
  Unicus English Olympiad (UEO)
  
  Syllabus (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 10, 2026 / Jul 22, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UEO
  
  Olympiad Preparation
  
  FAQs
  UGKO
  Unicus General Knowledge Olympiad (UGKO)
  
  Syllabus (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  -->
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  -->
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 8, 2026 / Jul 15, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UGKO
  
  Olympiad Preparation
  
  FAQs
  UCTO
  Unicus Critical Thinking Olympiad (UCTO)
  
  Syllabus (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  -->
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  -->
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 9, 2026 / Jul 18, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UCTO
  
  Olympiad Preparation
  
  FAQs
  UGMO
  Unicus Global Mathematics Olympiad (UGMO)
  
  Syllabus (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Sample Papers (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Exam Date:
  
  Jan 23, 2026 / Jan 29, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UGMO
  
  Olympiad Preparation
  
  FAQs
  UGSO
  Unicus Global Science Olympiad (UGSO)
  
  Syllabus (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Sample Papers (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Exam Date:
  
  Jan 21, 2026 / Jan 28, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UGSO
  
  Olympiad Preparation
  
  FAQs
  UGEO
  Unicus Global English Olympiad (UGEO)
  
  Syllabus (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Sample Papers (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Exam Date:
  
  Jan 16, 2026 / Jan 27, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UGEO
  
  Olympiad Preparation
  
  FAQs
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Unicus Mathematics Olympiad (UMO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Unicus Science Olympiad (USO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Unicus English Olympiad (UEO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Unicus General Knowledge Olympiad (UGKO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Unicus Critical Thinking Olympiad (UCTO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Unicus Global Mathematics Olympiad (UGMO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Unicus Global Science Olympiad (UGSO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Unicus Global English Olympiad (UGEO)

Syllabus (Year 2026-27)

Sample Papers (Year 2026-27)

Chemical Changes, Combustion and Reactions

Your Understanding of this Topic

Topic-Wise UGSO Quizzes for Class 8