The CBSE Class 10 Science Board Exam 2026 will be conducted on 25th February. The last-minute preparation becomes much stronger when you revise the most important Chemistry chapters properly - Carbon and Its Compounds and Metals and Non-Metals. These chapters are concept-based, include chemical reactions, properties, and reasoning questions, and frequently appear in case-based and assertion-reason formats.
The CBSE class 10 Science board exam is on 25th February 2026. Students should focus on quick revision, formula clarity, reaction understanding, and important definitions.
Why These Two Chapters Are Important for Boards
Prepare smartly for the CBSE Class 10 Science Board Exam 2026 with our quick revision videos on Carbon and Its Compounds and Metals and Non-Metals. These focused sessions cover key concepts, reactions, properties, and important questions - perfect for last-minute revision and improving your exam confidence. Carbon and Its Compounds and Metals and Non-Metals are important because:
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They carry good weightage in Chemistry section
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Questions are concept-based and scoring
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Reactions are often directly from NCERT
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Case-based and reasoning questions are common
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Diagrams and examples help secure full marks
With clear understanding, these chapters become easy and high-scoring.
Quick Revision of Carbon and Its Compounds
This chapter often feels confusing due to bonding and structures. But once basics are clear, it becomes simple. This video will help you in clearing your basics:
1. Covalent Bonding
Carbon has 4 valence electrons.
It shares electrons to complete its outer shell.
This sharing is called covalent bonding.
2. Properties of Covalent Compounds
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Low melting and boiling points
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Poor conductors of electricity
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Generally insoluble in water
3. Homologous Series
A family of organic compounds with:
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Same functional group
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Similar chemical properties
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Gradual change in molecular mass
4. Functional Groups
Important ones to revise:
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Alcohol (-OH)
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Carboxylic acid (-COOH)
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Aldehyde (-CHO)
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Ketone (>C=O)
5. Important Reactions
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Combustion
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Oxidation
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Addition reaction
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Substitution reaction
The Carbon & its Compounds One Shot video is helpful to quickly revise bonding, structures, and reactions clearly.
Quick Revision of Metals and Non-Metals
This chapter includes properties, reactions, extraction, and uses. Watch this video before your exams, this will help you revising the whole chapter in less time:
Important Topics to Revise
1. Physical Properties
Metals:
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Lustrous
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Good conductors
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Malleable and ductile
Non-metals:
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Generally dull
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Poor conductors
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Brittle
2. Chemical Properties of Metals
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Reaction with oxygen
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Reaction with water
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Reaction with acids
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Reactivity series
3. Ionic Bond Formation
Metals lose electrons.
Non-metals gain electrons.
Transfer of electrons forms ionic bond.
4. Reactivity Series
Important for displacement reactions and extraction methods.
5. Corrosion and Prevention
Example: Rusting of iron
Prevention methods: Painting, galvanization, alloying
The Metals and Non-Metals in One Shot video helps in revising reactions and concepts quickly
Smart Final Revision Strategy Before Exam
If exam is near, follow this:
Step 1
Watch Carbon One Shot and revise bonding + functional groups.
Step 2
Watch Metals and Non-Metals One Shot and revise reactivity series + extraction.
Step 3
Use Complete Chemistry One Video for full chapter recap.
Step 4
Go through NCERT examples and in-text questions.
Step 5
Solve 5–10 board-level questions from each chapter.
Common Mistakes to Avoid
Students often:
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Forget functional group names
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Mix up addition and substitution reactions
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Forget reactivity order
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Write incomplete chemical equations
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Miss state symbols in reactions
Avoiding these small mistakes can help you score full mark.
How This Revision Improves Your Score
When reactions and properties are fresh in your mind:
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You answer assertion-reason questions easily
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You solve case-based questions faster
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You write correct chemical equations
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You improve accuracy
Chemistry becomes scoring when concepts are clear.