Title CBSE Class 10 Science Question Paper 2024.pdf ✅

1 www.bankofbiology.com CBSE CLASS 10 SCIENCE QUESTION PAPER - 2024 Questions and Answers SECTION – A Select and write the most appropriate option out of the four options given for each of the questions 1-20. There is no negative mark for the incorrect response. 1. When 2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc in a test tube and then warmed, the reaction that occurs can be written in the form of a balanced chemical equation as: 1 (a) NaOH + Zn→ NaZnO2 + H2O (b) 2NaOH + Zn→ Na2ZnO2 + H2 (c) 2NaOH + Zn→ NaZnO2 + H2 (d) 2NaOH + Zn→ Na2ZnO2 + H2O Answer: (b) 2NaOH + Zn→ Na2ZnO2 + H2 2. Select from the following a decomposition reaction in which the source of energy for decomposition is light: 1 (a) 2FeSO4 → Fe2O3 + SO2 + SO3 (b) 2H2O → 2H2 + O2 (c) 2AgBr → 2Ag + Br2 (d) CaCO3 → CaO + CO2 Answer: (c) 2AgBr → 2Ag + Br2 3. A metal and a non-metal that exist in liquid state at the room temperature are respectively: 1 (a) Bromine and Mercury (b) Mercury and Iodine (c) Mercury and Bromine (d) Iodine and Mercury Answer: (a) Bromine and Mercury 4. Carbon compounds: 1 (i) are good conductors of electricity. (ii) are bad conductors of electricity. (iii) have strong forces of attraction between their molecules. (iv) have weak forces of attraction between their molecules. The correct statements are: (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iii) Answer: (c) (ii) and (iv) 5. Consider the following compounds: 1 FeSO4, CuSO4, CaSO4, Na2CO3 The compound having the maximum number of water of crystallisation in its crystalline form in one molecule is: (a) FeSO4 (b) CuSO4 (c) CaSO4 (d) Na2CO3 Answer: (b) CuSO4 6. Oxides of aluminium and zinc are: 1 (a) acidic (b) basic (c) amphoteric (d) neutral Answer: (c) amphoteric 7. MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 1 The reaction given above is a redox reaction because in this case: (a) 2 MnO is oxidised and HCl is reduced. (b) HCl is oxidised. (c) 2 MnO is reduced. (d) 2 MnO is reduced and HCl is oxidised. Answer: (d) 2 MnO is reduced and HCl is oxidised. 8. Consider the following statements: 1