Carbon and its Compounds Class 10 Worksheet with Online Quiz

• Count total bond order around each carbon, including double and triple bonds.
• Distinguish shared electron pairs from lone pairs.
• Learn each functional group with a formula and name.
• Apply hydrocarbon formulas only within their stated scope.
• Separate homologues from structural isomers.
• Write the conditions beside a reaction equation.
• Use hydrogencarbonate evidence to distinguish ethanoic acid from ethanol.
• Place soap heads toward water and tails toward oily dirt.

• Use the bond slider to connect tetravalency with hydrogen count.
• Switch to electron dots and count pairs rather than individual dots first.
• Ask why the same molecular formula may represent different structures.
• Use virtual test results as evidence rather than guessing from a compound name.
• Control soap quantity, water volume and shaking when discussing a fair comparison.

This Carbon and its Compounds Class 10 worksheet page combines written practice, a timed online quiz, interactive molecular models and virtual activities. Revise covalent bonding, functional groups, homologous series, naming, reactions, ethanol, ethanoic acid, soaps and detergents. Use the existing worksheet download for written work, then test the reasoning behind each answer above.

Tetravalency Catenation and Covalent Bonding

Carbon has electronic configuration 2,4 and commonly forms covalent bonds with total valency four. Sharing electrons avoids the large energy cost associated with forming simple C⁴⁺ or C⁴⁻ ions. Catenation means bonding with atoms of the same element, allowing chains, branches and rings. A single bond contains one shared pair, a double bond two and a triple bond three. Tetravalency does not mean carbon must always have four single bonds or four carbon neighbours.

Carbon and its Compounds Electron Dot Structures

The model switches between structural lines and shared electron pairs. Methane has four shared pairs. Ethene has six in the whole molecule, including its four C–H bonds. Ethyne has five. Carbon dioxide has four shared pairs and four lone pairs; water has two shared pairs and two lone pairs. A lone pair is not a bond. These 2D representations show connectivity and electron bookkeeping, not exact three-dimensional geometry.

Saturated and Unsaturated Hydrocarbons Formula Sheet

Hydrocarbons contain only carbon and hydrogen. Ethanol is a carbon compound but not a hydrocarbon because it also contains oxygen. A formula such as C₆H₁₂ does not by itself prove an open-chain alkene: a cycloalkane can have the same general formula.

Functional Groups and Nomenclature Class 10

Homologous Series and Structural Isomerism

Members of a homologous series share a functional group and common general formula. Successive members differ by CH₂ and 14 u in molecular mass using C=12 and H=1. Chemical properties are similar and physical properties change gradually. Structural isomers instead have the same molecular formula but different connectivity. Butane and 2-methylpropane are both C₄H₁₀, whereas ethane and propane are successive homologues.

Carbon and its Compounds Important Reactions

Incomplete combustion can produce carbon monoxide and soot; a flame description alone is not a unique identification test. In substitution, an atom is replaced. In addition, atoms add across a multiple bond. The notation [O] represents oxygen supplied by an oxidising agent, not a bottle of isolated oxygen atoms.

Ethanol and Ethanoic Acid Difference with a Solved Case

Ethanol, C₂H₅OH, contains an alcohol group. Ethanoic acid, CH₃COOH, is a carboxylic acid. Under the usual aqueous test conditions, ethanoic acid turns moist blue litmus red and releases CO₂ with sodium hydrogencarbonate; ethanol does not show these responses.

Esterification and Alkaline Ester Hydrolysis

Ethanoic acid and ethanol form ethyl ethanoate and water in a reversible, acid-catalysed reaction. Warming and an appropriate acid catalyst are associated with the textbook process.

Soap Micelle Diagram and Cleaning Action

A soap ion has a hydrophilic head and a hydrophobic hydrocarbon tail. In water, suitable aggregates can arrange tails toward an oily interior while heads face the water. These structures help disperse greasy dirt so it can be carried away during rinsing. The diagram is a section through an oil-containing aggregate, not an exact scale drawing. Micelle formation depends on suitable concentration and conditions.

Soap and Detergent in Hard Water

Calcium and magnesium ions can form insoluble salts with soap. The resulting scum consumes soap and reduces its effectiveness. Typical detergents do not form the same insoluble hardness scum and can lather more readily in hard water. Cleaning performance does not establish drinking-water safety or environmental harmlessness; formulation and biodegradability also matter.

Carbon and its Compounds Extra Questions with Answers

1. Why are many simple molecular compounds poor conductors? They generally lack mobile charged particles under the stated conditions.
2. Why does diamond not follow the low-melting-point molecular trend? It has an extended covalent network.
3. How many hydrogens are in an open-chain alkyne with four carbons and one triple bond? Six, from 2n−2.
4. How do ethane and ethene differ? They have different molecular formulas and different C–C bond orders.
5. Why is an unchanged red litmus strip not proof of neutrality? Acidic and neutral solutions can both leave it red.

Important Question Types and Current Update

Practise electron-dot structures, group identification, naming, homologous series, structural isomers, reaction equations and conditions, ethanol–acid comparisons, and micelle explanations. The official CBSE Science syllabus for 2026–27 lists carbon bonding, hydrocarbons, homologous series, nomenclature, reactions, ethanol, ethanoic acid, soaps and detergents. The official Science sample paper asks learners to explain soap scum and detergent action in hard water. These are verified study themes; the original tasks here are not claimed as repeated board-exam questions.

Tetravalency and stable bonds with other carbon atoms allow long chains, branches and rings, as well as combinations with other elements.

A single bond has one shared electron pair, a double bond two and a triple bond three. Count all shared pairs when analysing a complete molecule.

No. Hydrocarbons contain only carbon and hydrogen. Ethanol and ethanoic acid also contain oxygen, so they are not hydrocarbons.

Acyclic alkanes follow CₙH₂ₙ₊₂. Open-chain alkenes with one double bond follow CₙH₂ₙ, and open-chain alkynes with one triple bond follow CₙH₂ₙ₋₂. Rings and multiple unsaturations change the scope.

It is a family with a common functional group and general formula. Successive members differ by CH₂, giving a 14 u molecular-mass difference using C=12 and H=1.

Homologues belong to the same series and can differ by CH₂ units. Structural isomers have the same molecular formula but different connectivity.

In the usual aqueous test, ethanoic acid releases CO₂ with sodium hydrogencarbonate and turns moist blue litmus red. Ethanol does not show those acidic responses.

An alcohol and a carboxylic acid can form an ester and water in an acid-catalysed reversible reaction. Ethanol with ethanoic acid gives ethyl ethanoate.

Under the textbook conditions it acts as a dehydrating agent, helping remove water from ethanol to form ethene.

Hydrophobic tails associate with oil while hydrophilic heads face water. Aggregates help disperse oily dirt so it can be rinsed away.

Calcium and magnesium ions can form insoluble soap salts, producing scum and consuming soap. Typical detergents avoid the same hardness scum.

Practise bonding and electron-dot diagrams, functional groups, naming, formula scope, homologues and isomers, reactions with conditions, ethanol and acid tests, and soap-cleaning explanations. Use verified papers for actual previous-year questions.