Carbon and its Compounds
25 solved questions from Class 10 Science, each with the full working. Tap any question to see the step-by-step solution.
- 1 Which of the following is the correct IUPAC name of the compound C_4H_10 having the structure CH_3-CH(CH_3)-CH_3? easy MCQ 1 mark Naming of alkanes (IUPAC nomenclature) and recognizing branched isomers.
- 2 Methane burns in oxygen according to the balanced equation CH_4 + 2O_2 → CO_2 + 2H_2O. Calculate the volume of oxygen at STP required to completely combust 16 g of methane. medium 2 marks Stoichiometry of combustion reactions and use of molar volume at STP.
- 3 Explain why carbon dioxide (CO₂) acts as a greenhouse gas. In your answer, describe its interaction with infrared radiation and its effect on Earth's temperature. hard 5 marks Greenhouse effect of carbon dioxide
- 4 Which of the following statements about the polymerisation of ethylene to polyethylene is correct? hard MCQ 2 marks Addition polymerisation mechanism
- 5 Which functional group is present in the compound CH₃CH₂OH? easy MCQ 1 mark Functional groups in organic compounds
- 6 When butane (C₄H₁₀) combusts completely, it forms CO₂ and H₂O. Write the balanced chemical equation and calculate the mass of CO₂ produced when 5.0 g of butane is burnt in excess oxygen. medium 2 marks Combustion of alkanes
- 7 Which of the following statements about the allotropes of carbon is correct? easy MCQ 1 mark Allotropes of carbon
- 8 Identify the functional group present in the compound CH₃COOH and write its name. easy 1 mark Functional group – carboxylic acid
- 9 Calcium carbide reacts with water vapour to produce acetylene according to the equation: CaC₂ + 2 H₂O → C₂H₂ + Ca(OH)₂. If 56.0 g of CaC₂ is reacted completely with excess water vapour, calculate the volume of acetylene gas produced at NTP (1 mol gas = 22.4 L). hard 4 marks Production of acetylene from calcium carbide
- 10 Which functional group is present in acetaldehyde CH_3CHO? easy MCQ 1 mark Functional groups
- 11 Calcium carbonate reacts with hydrochloric acid as: CaCO_3 + 2HCl → CaCl_2 + CO_2 + H_2O. If 11.0 g of CaCO_3 is completely reacted with excess HCl, calculate the volume of carbon dioxide gas produced at NTP (1 mol gas = 22.4 L). easy 2 marks Mole concept and gas volume
- 12 Ethene (C_2H_4) polymerises to polyethylene according to the simplified equation n C_2H_4 → (C_2H_4)_n. If 5.0 L of ethene at STP is completely polymerised, calculate the mass of polyethylene formed (molar mass of the repeating unit C_2H_4 = 28 g mol^-1). Assume the polymer contains the same number of repeating units as moles of ethene reacted. medium 3 marks Polymerisation and molar calculations
- 13 Which statement about the allotrope diamond is correct? medium MCQ 1 mark Properties of carbon allotropes
- 14 Describe the industrial preparation of acetylene from calcium carbide, write the balanced chemical equation, list two major uses of acetylene, and explain why acetylene is preferred as a fuel in welding. hard 5 marks Preparation and uses of acetylene
- 15 What is the primary topic or theoretical principle explored in 'Carbon and its Compounds' (Class 10 SCIENCE)? medium MCQ Chapter Core Principle
- 16 Which key mechanism or analytical rule is highlighted in 'Carbon and its Compounds'? medium MCQ Key Analytical Mechanism
- 17 If 8.0 L of ethene gas at STP is completely polymerised to polyethylene, calculate the mass of polyethylene formed. (Molar mass of repeating unit ceC2H4 = 28 g mol^-1). Assume the polymer contains the same number of repeating units as moles of ethene reacted. hard 4 marks Polymerisation of ethene
- 18 Which functional group is present in the compound ceCH3CH2CH2OH? medium MCQ 2 marks Functional group identification
- 19 During a laboratory experiment, 3.0 g of pure methane gas is burnt completely in excess oxygen. Calculate the volume of carbon dioxide produced at NTP (assume 1 mol gas = 22.4 L). easy 3 marks Combustion of methane
- 20 Write the balanced chemical equation for the complete combustion of butane (C4H10) and calculate the mass of CO₂ produced when 5.0 g of butane is burnt in excess oxygen. medium 3 marks Combustion stoichiometry
- 21 Identify the functional group present in the compound CH3COOH. easy 2 marks Functional group identification
- 22 Ethene (C₂H₄) polymerises to polyethylene according to the simplified equation n C₂H₄ → (C₂H₄)ₙ. If 6.0 L of ethene at NTP is completely polymerised, calculate the mass of polyethylene formed, assuming the polymer contains the same number of repeating units as moles of ethene reacted. Molar mass of repeating unit C₂H₄ = 28 g mol⁻¹. Assume 1 mol gas = 22.4 L. hard 4 marks Polymerisation stoichiometry
- 23 During a laboratory experiment, 3.0 g of pure methane gas is burnt completely in excess oxygen. Calculate the volume of carbon dioxide produced at NTP (assume 1 mol gas = 22.4 L). medium 3 marks Combustion volume calculation
- 24 Identify the functional group present in the compound CH₃CHO. easy 2 marks Functional group identification
- 25 If 10.0 L of ethene gas at STP is completely polymerised to polyethylene, calculate the mass of polyethylene formed. (Molar mass of repeating unit C₂H₄ = 28 g mol∑, assume polymer contains the same number of repeating units as moles of ethene reacted). hard 5 marks Polymerisation mass calculation