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Bihar Board Class 10 (BSEB) Carbon and its Compounds — practice questions

Explore 68 free Carbon and its Compounds questions in Bihar Board Class 10 (BSEB) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Carbon and its Compounds questions and exercises with answers

Showing questions 1–30 of 68.

Carbon forms bonds by:Read the answer and worked solution →In a covalent double bond, the number of electron pairs shared is:Read the answer and worked solution →Diamond and graphite differ because they are:Read the answer and worked solution →Why do most covalent compounds have low melting points?Read the answer and worked solution →A compound with only single bonds between carbon atoms is called:Read the answer and worked solution →The general formula for the alkane series is:Read the answer and worked solution →Pentane and isopentane share the formula C₅H₁₂ but differ in their carbon arrangement. They are:Read the answer and worked solution →The IUPAC name of CH₃CH₂OH is:Read the answer and worked solution →Which of the following pairs are members of the same homologous series?Read the answer and worked solution →The functional group –COOH represents:Read the answer and worked solution →Combustion of a hydrocarbon in plenty of oxygen produces:Read the answer and worked solution →In alkaline KMnO₄, ethanol is converted to:Read the answer and worked solution →Hydrogenation of vegetable oil in the presence of nickel catalyst converts it to:Read the answer and worked solution →Reaction of CH₄ with Cl₂ in sunlight to give CH₃Cl is an example of:Read the answer and worked solution →A soap molecule cleans greasy clothes mainly because:Read the answer and worked solution →Detergents work better than soaps in hard water because:Read the answer and worked solution →How many valence electrons does a carbon atom have?Read the answer and worked solution →Why does carbon form covalent rather than ionic bonds?Read the answer and worked solution →Which is an allotrope of carbon?Read the answer and worked solution →The general formula of an alkane is:Read the answer and worked solution →Which functional group is present in ethanoic acid?Read the answer and worked solution →Which property of carbon allows it to form long chains?Read the answer and worked solution →What is the IUPAC name of CH3CH2OH?Read the answer and worked solution →Which is the simplest aldehyde?Read the answer and worked solution →The flame produced when a saturated hydrocarbon burns in plentiful air is:Read the answer and worked solution →The chemical reaction where alcohol and carboxylic acid form a fruity-smelling ester is called:Read the answer and worked solution →Diamond conducts heat well but does NOT conduct electricity because:Read the answer and worked solution →Graphite is soft and a good conductor of electricity because:Read the answer and worked solution →Which catalyst is used to add hydrogen across the double bond of an alkene?Read the answer and worked solution →Why do soaps NOT work well in hard water?Read the answer and worked solution →

Worked practice questions

Carbon forms bonds by:

  1. losing 4 electrons
  2. sharing 4 electrons
  3. transferring 4 electrons
  4. gaining 4 electrons
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Correct answer: B. sharing 4 electrons

Carbon has 4 outer electrons. Removing or adding 4 needs too much energy, so carbon shares — forming covalent bonds.

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In a covalent double bond, the number of electron pairs shared is:

  1. 3
  2. 4
  3. 2
  4. 1
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Correct answer: C. 2

A double bond shares 2 pairs (4 electrons) between the same two atoms.

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Diamond and graphite differ because they are:

  1. isotopes of carbon
  2. different atom types
  3. isomers of carbon
  4. allotropes of carbon
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Correct answer: D. allotropes of carbon

Both are pure carbon. Allotropes are different physical forms of the same element, arising from different bonding arrangements (diamond is 3D, graphite is layered).

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More Chemistry topics

Periodic Classification of ElementsMetals and Non-metalsAlcohols Phenols EthersAldehydes KetonesAlkenesChemical EquilibriumClassification of Elements and PeriodicityClassification of Elements and Periodicity in Properties