CBSE 2024-25 Competency-Based Questions With Answers: In today’s classrooms, learning is changing to focus more on understanding and skills. This article is about Chapter 4 of the CBSE Class 10 Science book, which is all about "Carbon and its Compounds." Carbon is an important element found in many things around us, and it plays a big role in nature and industry. We will look at questions that help students think deeply and use what they’ve learned in real life. These competency-based questions (CBQs) are designed by CBSE experts and thus are considered best for practice. Check out the questions here and download the PDF.
CBSE Class 10 Science Carbon and its Compounds Competency-Based Questions
Solving practice papers is the best practice to clear an examination. Thus, students must solve all the available papers related to CBSE Class 10 Science to get a wide range of questions. You can get the CBSE-curated CBQs for Carbon and Its Compounds here with answers.
| Q. No | Question | Marks |
| Free Response Question/ Subjective Question | ||
| Q.1 | Combustion analysis of compound X revealed the ratio of its elements in a molecule to be carbon:hydrogen:oxygen::3:6:2. The compound undergoes esterification to yield an ester and water. a. Identify the compound X. Write its chemical formula. b. Write the balanced equation for the combustion of compound X. | 2 |
| Q.2 | Bonding of oxygen with carbon and with hydrogen are highly exothermic processes. Compare the amount of energy released on combustion of methane and propane. a. Which compound will yield more energy per mole on combustion? Justify your answer. b. Write the balanced chemical equations for complete combustion of propane and methane. | 3 |
| Q.3 | One mole of an alkane P is burned in an excess of oxygen to yield 6 moles of carbon dioxide and 14 moles of water. a. Write the chemical formula and chemical name of the compound. b. Will this compound produce a clear or sooty flame on burning? Justify your answer. | 3 |
Answer Key & Marking Scheme
| Q. No | Answers | Marks |
| Q.1 | (a) Propionic acid / Propanoic acid [0.5 marks] C2H5COOH [0.5 marks] (c) 2C2H5COOH + 7O2 --> 6CO2 + 6H2O + energy | 2 |
| Q.2 | a. Energy released per mole will be more in propane since it has more number of carbon atoms. b. 1 mark for each correct equation: CH4 + 2O2 --> CO2 + 2H2O C3H8 + 5O2 --> 3CO2 + 4H2O | 3 |
| Q.3 | a. 1 mark each for the correct name and formula: chemical name - Hexane chemical formula - C6H14 b. It will burn with a clear flame since it is a saturated hydrocarbon. | 3 |
To download these questions and their answer in PDF, click on the link below:
| Download CBSE Class 10 Carbon Compounds Competency-Based Questions with Solution 2025 PDF |
Weightage of Competency-Based Questions in CBSE Class 10 Boards
For the academic sessions 2023-24 and 2024-25, the composition of the question paper for the year-end and Board examinations for Classes IX and X remains unchanged. Competency-focused questions, which include multiple-choice questions (MCQs), case-based questions, and source-based integrated questions, will constitute 50% of the total marks. Additionally, selected response-type questions, such as MCQs, will account for 20%. The remaining 30% will consist of constructed response questions, which include short-answer and long-answer questions, following the existing pattern. This structure emphasizes a balanced approach to assessing both knowledge and practical application.
Check out the links below for more information.
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