CBSE 10th Science 2 Marks Questions: The CBSE Class 10 Science Board Paper 2024 will comprise 39 questions distributed into five sections. Section B will be the section of the question paper that will have six questions of two marks each. Thus, this whole section will have 12 marks. It is suggested that answers to these questions should be in the range of 30 to 50 words. There are multiple topics out of which 2-mark questions can be formed.
Here, you will get chapter-wise 2-mark questions for CBSE Class 10 Science. These questions will be from important topics, and you might see related questions in your exam paper. Check out the 10th 2-mark questions with solutions here in a chapter-wise PDF. Raised Floor Installation Guide
The correct answer is: (b) Oxygen gains electrons.
During the rusting of iron, the process involves the reaction of iron with oxygen and water to form iron oxide (rust). The correct statements are:
(a) Iron loses electrons: This is correct. In the rusting process, iron undergoes oxidation, losing electrons.
(b) Oxygen gains electrons: This statement is incorrect. Oxygen does not gain electrons; instead, it accepts electrons in the reduction half-reaction.
(c) Iron oxide is formed: This is correct. The rust formed is essentially iron oxide, which is a compound of iron and oxygen.
(d) The reaction is exothermic: This is correct. The rusting of iron is an exothermic process, meaning it releases energy.
Answer: CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O (Double displacement reaction). In this case, calcium carbonate (CaCO3) reacts with hydrochloric acid (HCl) to produce calcium chloride (CaCl2), carbon dioxide (CO2), and water (H2O).
Answer: White precipitate of barium sulphate forms. It is a double displacement reaction.
When zinc sulfate solution (ZnSO4) is added to barium chloride solution (BaCl2), a precipitation reaction occurs. The balanced chemical equation for the reaction is:
ZnSO4 + BaCl2→ZnCl2 + BaSO4
In this reaction, zinc sulfate reacts with barium chloride to produce zinc chloride (ZnCl2) and barium sulfate (BaSO4 ). The barium sulfate formed is insoluble in water and appears as a white precipitate. So, the precipitate formed is BaSO4, and the type of reaction is a double displacement reaction with the formation of a precipitate.
Answer: Combustion: Combines with oxygen, releases heat and light (e.g., burning wood). Decomposition: Breaks down one compound into simpler substances, often requiring external energy (e.g., thermal decomposition of calcium carbonate).
Answer: Mg + 2HCl → MgCl₂ + H₂ (Hydrogen gas; burns with a popping sound) Explain the concept of coefficients in a balanced chemical equation.
Answer: Coefficients represent the number of molecules or atoms of each reactant and product involved in the reaction, ensuring the law of conservation of mass. More Class 10th Important 2 Marks Questions for Practice
Check the chapter-wise 2 mark questions below. Click on the chapter and download the PDF. CBSE Class 10 Science Chapter 1 Chemical Reactions and Equations 2 mark questions CBSE Class 10 Science Chapter 2 Acids, Bases, and Salts 2 mark questions CBSE Class 10 Science Chapter 3 Metals and Non-Metals 2 mark questions CBSE Class 10 Science Chapter 4 Carbon and Its Compounds 2 mark questions CBSE Class 10 Science Chapter 5 Life Processes 2 mark questions CBSE Class 10 Science Chapter 6 Control and Coordination 2 mark questions CBSE Class 10 Science Chapter 7 How do organisms reproduce 2 mark questions CBSE Class 10 Science Chapter 8 Heredity 2 mark questions CBSE Class 10 Science Chapter 9 Light Reflection and Refraction 2 mark questions CBSE Class 10 Science Chapter 10 The Human Eye and The Colourful World 2 mark questions CBSE Class 10 Science Chapter 11 Electricity 2 mark questions CBSE Class 10 Science Chapter 12 Magnetic Effects of Electric Current 2 mark questions CBSE Class 10 Science Chapter 13 Our Environment 2 mark questions
*The links will be updated soon. CBSE Class 10 Science Unit-Wise Weightage
Follow the table below to know the unit-wise mark distribution and accordingly aim for the chapters to be revised during the final board exam. Unit Marks I. Chemical Substances-Nature and Behaviour 25 II. World of Living 25 III. Natural Phenomena 12 IV. Effects of Current 13 V. Natural Resources 05 Total 80 Internal assessment 20 Grand Total 100
Read: CBSE Class 10 Science 60 Day Routine CBSE Class 10 Science Question Paper Pattern
Check the CBSE Class 10 Science Board Exam 2024 question paper pattern and build a time management strategy accordingly. Type of Question No. of Questions Marks Allotted per question Total Marks Objective Type 20 1 mark per question 20 x 1 = 20 Very Short Answer Type 6 2 marks per question 6 x 2 = 12 Short Answer Type 7 3 marks per question 7 x 3 = 21 Long Answer Type 3 5 marks per question 3 x 5 = 15 Source Based/Case Based 3 4 marks per question 3 x 4 = 12
Also Read: CBSE Date Sheet 2024 Revised NCERT Textbooks Class 10 CBSE Class 10 Sample Paper 2024 CBSE Class 12 Science Syllabus 2023-24 CBSE Class 10 Science Mind Map For Quick Revision CBSE Class 10 Science Additional Practice Questions 2024 CBSE Class 10 Science Competency Based Questions 2024
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