Class 10 • Chemistry • Chapter 4
Carbon and its Compounds
True & False Quiz
Bond. Chain. Oxidise.
✓True
✗False
25
Questions
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Ch.4
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Why True & False for Carbon and its Compounds?
How this format sharpens your conceptual clarity
🔵 Carbon is the backbone of all life — organic chemistry begins here, from fuels and plastics to proteins and DNA.
✅ T/F tests covalent bonding, homologous series, functional groups, isomers, and ethanol vs ethanoic acid properties.
🎯 Carbon forms 4 covalent bonds (tetravalent) — NOT ionic bonds — due to its midway position on the electronegativity scale.
📋
Read each statement carefully. Click True or False — instant feedback with explanation appears. Submit anytime; unattempted questions are marked Skipped.
Q 1
Carbon forms ionic compounds by losing or gaining electrons easily.
Q 2
Carbon has the ability to form a large number of compounds due to its tetravalency.
Q 3
Hydrocarbons are compounds made up of carbon and hydrogen only.
Q 4
Alkanes contain at least one double bond between two carbon atoms.
Q 5
Isomers are compounds with the same molecular formula but different structures.
Q 6
Diamond is the hardest natural substance due to its strong covalent bonding in a 3D network.
Q 7
Cooking oil is a saturated compound.
Q 8
Carbon monoxide is a poisonous gas formed by incomplete combustion of carbon.
Q 9
Carbon shows the property of catenation by forming bonds with other carbon atoms.
Q 10
Alkenes have the general formula \(C_nH_{2n+2}\).
Q 11
Ethanol undergoes dehydration to form ethene in the presence of concentrated sulfuric acid.
Q 12
Ketones contain the carbonyl (C=O) group bonded to at least one hydrogen atom.
Q 13
Carbon dioxide reacts with water to form carbonic acid.
Q 14
Saturated hydrocarbons are chemically more reactive than unsaturated hydrocarbons.
Q 15
Methane is an example of an alkane.
Q 16
In the reaction of sodium with ethanol, ethanoic acid is formed.
Q 17
Soap molecules repel dirt because of their hydrophobic tails.
Q 18
Hydrocarbons are good fuels because they contain a large amount of carbon and hydrogen.
Q 19
Graphite is a good conductor of electricity because of free electrons in its layers.
Q 20
Alkyne hydrocarbons contain only single bonds between carbon atoms.
Q 21
Functional groups determine the chemical properties of organic compounds.
Q 22
Ethanoic acid has a sour taste and a pungent smell.
Q 23
Carbon tetrachloride is a compound containing carbon and chlorine only.
Q 24
Ethanol burns with a smoky flame due to incomplete combustion of carbon.
Q 25
Benzene is an example of an aromatic hydrocarbon.
Key Takeaways — Carbon and its Compounds
Core facts for CBSE Boards & exams
1
Carbon is tetravalent (4 bonds) and shows catenation (long C–C chains).
2
Saturated hydrocarbons: only single bonds (alkanes, CₙH₂ₙ₊₂); unsaturated: double/triple bonds.
3
Homologous series: compounds differing by –CH₂– (14 mass units) with same functional group.
4
Ethanol (C₂H₅OH): neutral, reacts with Na, used in beverages; Ethanoic acid (CH₃COOH): acidic, vinegar.
5
Saponification: ester + NaOH → soap (sodium salt of fatty acid) + glycerol.
6
Functional groups: –OH (alcohol), –COOH (carboxylic acid), –CHO (aldehyde), –CO– (ketone).