Tiêu đề IX SC PA-II-QUESTION 2023-24 (1).pdf ✅

P.A-II/SC-IX/SET-I Page 1 of 8 CLASS-IX SUBJECT: SCIENCE (086) Time Allowed: 3Hours Maximum Marks: 80 SECTION-A Select and write the most appropriate option out of the four options given for each of the questions 1-20. 1. A car is travelling at a speed of 90 km/h. Brakes are applied so as to produce a uniform acceleration of – 0.5 m/s2 . Find how far the car will go before it is brought to rest. 1 (a) 8100 m (b) 900 m (c) 625 m (d) 620 m 2. Sweety swims in a 90m long pool from one end to another and back. Her average velocity is (a) Zero 1 (b) 180m/s (c) 90m (d) 2m/s  Check that this question paper contains 8 printed pages.  Set number given on the right hand side of the question paper should be written on the title page of the answer book by the candidate.  Check that this question paper contains 39 questions.  Write down the Serial Number of the question in the left side of the margin before attempting it.  15 minutes cooling time has been allotted to read this question paper only and do not write any answer on the answer book during this period General Instructions: i. This question paper consists of 39 questions in 5 sections. ii. All questions are compulsory. However, an internal choice is provided in some questions. A student is expected to attempt only one of these questions. iii. Section A consists of 20 objective type questions carrying 1 mark each. iv. Section B consists of 6 Very Short questions carrying 02 marks each. Answers to these questions should be in the range of 30 to 50 words. v. Section C consists of 7 Short Answer type questions carrying 03 marks each. Answers to these questions should be in the range of 50 to 80 words. vi. Section D consists of 3 Long Answer type questions carrying 05 marks each. Answer to these questions should be in the range of 80 to 120 words. vii. Section E consists of 3 source-based/case-based units of assessment of 04 marks each with sub- parts.
P.A-II/SC-IX/SET-I Page 2 of 8 3. Choose the correct velocity-time graph of a moving particle on which net external force acting is zero. 1 (a) (b) (c) (d) 4. Area under a v-t graph represents a physical quantity which has the unit 1 (a) m2 (b) m (c) m/s2 (d) m/s 5. In collision between a heavier body and a lighter body 1 (a) both experiences the same force (b) both undergo same change in momentum (c) lighter body is likely to be damaged more than the heavier body (d) all the above 6. The following figure shows three identical blocks of wood floating in three different liquids A, B and C of densities d1, d2 and d3 respectively. Which of these has the highest density? 1 (a) Liquid A (b) Liquid B (c) Liquid C (d) All the three liquids 7. The boiling point of alcohol is 78°C. What is this temperature in Kelvin scale? 1 (a) 373 K (b) 351 K (c) 375 K (d) 78 K 8. Two substances, A and B were made to react to form a third substance, A2B according to the following reaction 1 2A + B → A2B Which of the following statements concerning this reaction are incorrect ? (i) The product A2B shows the properties of substances A and B. (ii) The product will always have a fixed composition. (iii) The product so formed cannot be classified as a compound. (iv) The product so formed is an element (a) (i), (ii) and (iii) (b) (ii), (iii) and (iv) (c) (i), (iii) and (iv) (d) (ii) and (iv)
P.A-II/SC-IX/SET-I Page 3 of 8 9. White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. Identify the correct statement about the samples. 1 (a) They are homogeneous mixtures and are classified as metallic alloys. (b) The materials are heterogeneous mixtures and can be classified by their components. (c) The samples have variable compositions and are classified as metallic solutions. (d) The samples are heterogeneous mixtures that can be separated using magnetic properties. 10. Rusting of an article made up of iron is called 1 (a) corrosion and it is a physical as well as chemical change (b) dissolution and it is a physical change (c) corrosion and it is a chemical change (d) dissolution and it is a chemical change 11. Which among the following is not a postulate of Dalton9s atomic theory? 1 (a) Atoms cannot be created or destroyed. (b) Atoms of different elements have different sizes, masses and chemical properties. (c) Atoms of a given element are not identical in mass and chemical properties. (d) Atoms are very tiny particles which cannot be further divided. 12. During the decomposition of water by passing electricity, 36g of water produce 4g of hydrogen gas. Then predict the mass of oxygen gas produced. 1 (a) 30g (b) 31g (c) 16g (d) 32g 13. Rahul puts four raisins in two beakers, A and B. Beaker A contains 50 ml of distilled water and beaker B contains 50 ml of saturated sugar solution. After some time he would observe that 1 (a) raisins in beaker A are more swollen than those in beaker B (b) raisins in beaker B are more swollen than those in beaker A (c) raisins in both beakers A and B are equally swollen (d) raisins in beaker A do not swell up at all. 14. Lignified or thickened cell wall is a characteristic feature of 1 (a) Collenchyma (b) Sclerenchyma (c) Parenchyma (d) Phloem 15. From the diagram given below identify X and Y. 1 (a) X-Cork Y-Guard cell (b) X- Epidermal cell Y-Stomata (c) X- Epidermal cell Y- Guard cell (d) None of the above. X Y