Final Terminal Examination 2024 - 2025 Subject ~ Science Class - 1X Time ~ 3 hours Full marks ~ 60 General instructions: 4. This question paper consists of 39 questions in § Sections, 2. All questions are compulsory. However, an internal choice is provided in some questions, Astudent is ‘expected to attempt only one of these questions. questions carrying 1 mark each, 3. Section A consists of 20 objective type \s carrying 02 marks each. Answers to these questions should 4, Section B consists of 6 Very Short question: bbe in the range of 30 to 50 words. 5 Section C consists of 7 Short Answer type questions carrying 03 marks each. Answers to thes should be in the range of 50 to 80 words. 6. Section D consists of 3 Long Answer type questions car ‘should be in the range of 80 to 120 words. 7. Section E consists of 3 source-based/case-based units of assessment of 04 marks € se questions 1g 05 marks each. Answer to these questions ‘ach with sub-parts, SECTION-A 20 Choose the correct option. 4x2 4. Which of the following is a colloidal solution? (a) Starch solution (b) Copper sulphate solution (c)Chalk powder in water (d) kerosene oil in water. 2. The balancing of chemical equation is based on: (2) Law of combining volume (b) Law of conservation of mass (c) Law of constant proportion (a) Avogadro's Law 3. Which of the following does not have 8 valence electrons? (a) Ar (b) Ne (co) Kr (d) He 4, The electronic configuration of Cl ior (a) 2,8,7 (b) 2,8,8 () 2.8.6 (4) 2,8,8,1 5. Which of the following is heterogeneous? (a) Stainless Stee! (b) Brass (air (a) Smoke 6. Which of the following tissue stores fat? (a) Plasma cell (b) Osteoblast (c) Areolar (d) Adipose Uo7. The cells of which muscle never gets tired (a) Cardiac muscles _(b) Non Striated muscles (c) Striated muscles _ (d) Smooth muscles 8. India can increase agriculture production by (a) farming on more land (b) growing more crops (c) increasing production efficiency (d) increasing livestock number 8. Growing different crops on a piece of land in pre-planned successions is known as (a)Crop rotation —_(b) Mixed cropping (c)Vermi-compost _(d)Hybridization 10. Manure prepared from semi-decomposed mixture of farm animal dung, litter, left over feed of cattle etc a) Compost (b) Farmyard manure —(c) Green manure (d) Vermicompost 11. The figure of fresh water variety of fish is given below, mention where does it reside? {c) bottom of the pond —_(d) alll parts of the pond. (a) surface of the water (b) middle zone 12. Which one the following nutrients is not available in fertilizers? (a) Potassium (a)Phosphorus —_(b) Nitrogen {c) Iron 13. If v is frequency and T is time period, then which of the following is true? (ayvT=1 (b) v?7=1 (0) vT?= (avit=4 14. The audible range is (c) 20Hz-20000Hz (d) 20Hz-200kHz (a) 0-20 Hz (b) 20Hz-2000Hz 18. Work done by a force on an object is negative. The angle between the force and the displacement of the object is. (a) 0° (b) 45° (c) 90° 46. A sealed tin of liquid of 500g has volume of 250 cm *. Density of the tin is (c) 2.3 gem’, (A) 1.33 glem? (a) 180° (a) 4 glom? (b) 2 g/em* In each of the following questions, a statement of Assertion and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as: a. Both assertion (A) and reason (R) are true and reason is the correct explanation of assertion. b. Both assertion (A) and reason (R) are true but reason is not the correct explanation of assertion. c. Assertion(A) is true but reason (R) is false. d. Assertion (A) Is false and Reason (R) is true.47.Assertion (A): Protons and neutrons are present in the nucleus of an atom. 7 mber of Reason (R): The total sum of electrons and protons in an atom determines the mass nu! the element. 18. Assertion(A): Broiler chicken are raised for meat Reason(R): They are allowed to grow and gain weight. 49. Assertion(A): A sound produced by a vibrating body with large amplitude is a foud sound. Reason(R): Loudness of sound depends on the amplitude of vibrating body. 20. Assertion(A): Blood is a connective tissue with a firm matrix. Reason(R)): It helps in transport inside the body. SECTION B 2x6 = 12 21 What is tincture of iodine? Identify the solute and solvent in it. 22.1f the symbolic representation of an atom is $x. fin reason for the valency? valency, name and also give the correct 23, What is stratified squamous epithelium? State its function. 24. Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard? 25. The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute? OR Aperson holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer. 26. List two characteristics each of roughage and concentrate in relation to animal feed. OR What is irrigation? Describe briefly any one of the method of it. SECTION C 3x7=21 27. Calculate the formula unit masses of {a) ZnO (b) Naz (Given atomic masses of Zn =65u, Na = 23u, K = 99 u, C= 12 u and O= 16 u) 28 (a) What are Isobars? (c) K2C Os ‘98K to form saturated soluti Calculate the mass by mass percentage of the solution, solution. ORtio by mass of the / mpute the Fal Give the chemical formulae forthe following compounds and comP combining elements in each one of them hide (iil) Hydrogen mon to both the comP joride Magnesium sulp! er (i) Ammonia 29,(a) Name the living components com plants. What are its functions? Jp other. i each other. (b) Give any two ways in which these tissues differ functionally from 4 . 1 elated. 30. Explain the factors on which cultivation practices and CrP yield are has been raised " | +m’ that has : 31. (a) Derive an expression for the potential energy of an object of mass to a height ‘h' from the ground. (b) Define potential energy. k done rf 32. (a) A satellite of mass mis moving round the earth with a speed v. State the ee istify your answer. etic energy? Explain with a foes it exert in moving the ca! by the force of gravity on the satellite. Give reasons to J diagram. rata (b) Where does an oscillating pendulum have maximum kine 433. A 150 kg car engine develops 500 W for each kg. What force 4 speed of 20 mis? SECTION D 5x3515 34. Represent graphically by two separate diagrams in each case- jude but different frequencies. (a) Two sound waves having the same amplit yy but different amplitudes. (b Two sound waves having the same frequenc| (c)Establish the relationship between speed of sound, its wavelength and frequency. OR (i) A410 kg ball is thrown upwards with a velocity of § m/s. Calculate the maximum height of the ball and its potential energy when it reaches the highest point. 15s 900 kg is travelling at a steady speed of (i) A car of ma: 2000 N, as illustrated in 30 mis against a resistive force of the given figure. (a) Calculate the energy used in 1 second against the resistive force. (b) What is the minimum power that the car engine has to deliver to the wheels? (c) What form of eneray is in the fuel, used by the engine to drive the car? 436. (a) What are the limitations of Rutherford's model of an atom? ‘emical reaction 10.6g of sodium carbonate reacts with 12 g of ethanoic acid, The (b) Inach 1g of carbon dioxide, 16.4g of sodium ethanoate and 1.89 of water. products formed were 4.4: (i) Write word equation showing reactants and products. (li) Also show that the data is in agreement with the Law of Conservation of mass. Gs)OR (2) Write any two postulates of Bohr's model of an atom? = (b) What Information do you get from the given figure about its atomic Vie SY j ‘number, mass number and valency. Justify your answer- {c) What are polyatomic ions? Give an example. 36.(a) Define animal husbandry. (b) Mention any two basic requirements of shelter for animals so that thelr health is not affected (c) Differentiate between capture and culture fishery. (two points). (d) Give one example of each, indigenous and exotic breed of poultry. OR (a)What is Apiculture? Mention the name of two local species related to it? (b) How can weed be controlled in the agricultural land? (give two methods) .e of fertilizers and Chemical pesticides is harmful” (c) Justify the statement “Excessive usi SECTION-E 4x3=12 Q.37 to Q.39 are case based questions with 2 to 3 short sub-parts. Internal choice is provided in one of these sub-parts. 37. A pond was located near a tube-tyre repairing shop. A group of class IX students present near the pond for a picnic, noticed one of their classmate Ankit falling in the pond. Ankit started screaming for help. The topper of the class Soham immediately responded. He rushed to the tube-tyre repairing shop and brought an inflated tube and threw it towards Ankit. Ankit got hold of that tube and was saved. (a) What is thrust? (b) State the principle of physics that Soham had in his mind. (c) A solid object of mass 100 g and volume 200 cm? is put in water. Will it float or sink? Explain. (Take density of water as 1 g/cm?) OR (C)A solid object of volume 250 cm? is immersed completely in water. Calculate the buoyant force. 38. is a mixture of gases. As we go higher the level of ox; i rmounan liners take clin of oxygen wih tem, Meat se lghar han ya thet (a) Why is air a mixture and not a compound? (b) Name two gases present in air which are non- supporters of combustion, (c) Give two reasons why ‘NaC! a compound. 9)oR (c) (i) Why is moist air lighter than dry air? photosynthesis. s of the trunk get roots, branches, (ii) Name a gas present in air which is a by-product in the process of 39. A tree trunk is regularly increasing its girth. Naturally the outer covering cell stretched and rupture. Plants are continuously forming new organs like stem, new leaves, flowers, fruits, etc. (a) What is the name of the outer layers of dead cells found around the tree trunk? > (b) What is the characteristics of the outer layer of desert plants? (C) Write the name and state the function of the tissue that is found only in aquatic plants. OR _(c)Write the name and one characteristic of the tissue that makes the husk of coconut. X oe