Grade 11 – Science July paper Welcome to your Grade 11 – Science July paper ● Answer all questions.01. The part not belonging to the gynoecium of a flower is1. Anther2. Ovary3. Style4. Stigma 02. In which of the following organelle does cellular respiration occur?1. Golgi body2. Chloroplast3. Ribosome4. Mitochondria 03. An occasion where essential oils are extracted from natural oils in Sri Lanka is production of1. Soya oil2. Coconut oil3. Citronella oil4. Vegetable oil 04. The heat energy change associated with a chemical reaction is illustrated by the following graph.Accordingly, the reaction is1. Exothermic and the energy of reactants is greater than that of products.2. Endothermic and the energy of reactants is greater than that of products.3. Exothermic and the energy of reactants is less than that of products.4. Endothermic and the energy of reactants is less than that of products 05. Select the correct statement1. In an acid blue litmus turns red; red litmus turns blue.2. In an acid blue litmus turns red; red litmus doesn’t change colour.3. When two pieces of blue and red litmus are added together into an acid, both become colourless.4. In an acid red litmus turns blue; blue litmus doesn’t change colour. 06. The international unit of measuring force is?1. J2. N3. A4. V 07. In three of the following a name of a scientist and an area of study relevant to a law put forward by him aregiven. Which is the mismatch?1. Archimedes – up thrust2. Ampere – Current electricity3. Newton – Transmission of fluid pressure4. Faraday – Electromagnetic induction 08. Which of the following is an instance where the moment of a couple of forces is made use of?1. Drawing water using a pulley.2. Opening a door by turning a key.3. Lifting a weight using an inclined plane.4. Cutting arecanut with a nut cracker. 09. The type of tissue that lines an external or internal surface of the body an animal is,1. Epithelial tissue2. Muscle tissue3. Connection tissue4. Nervous tissue 10. Which of the following isn’t a material factor essential for photosynthesis?1. Chlorophyll2. Sun3. Carbon dioxide4. Water 11. Which of the following relationships doesn’t match?1. Chloroplast – Photosynthesis2. Golgi body – Secreting function3. Nucleus – Control of biological processes of the cell4. Ribosome – Production of energy 12. A few statements about the muscle tissue are given below. A. Executing voluntary movements of the body while connecting with bones.B. Executing mechanical movements in the wall of the alimentary canal.C. Maintaining rhythmic movements of the heart.The muscle relevant to A, B and C respectively are,1. Smooth muscles, Skeletal muscles and Cardiac muscles.2. Cardiac muscles, Smooth muscles and Skeletal muscles.3. Skeletal muscles, Smooth muscles and Cardiac muscles.4. Cardiac muscles, Skeletal muscles and Smooth muscles 13. Which of the following gives two non-flowering plants?1. Nepenthes – Nephrolepis.2. Ipormea – Mimosa.3. Selaginella – Cycus.4. Pogonatum – Eichornea. 14. Which of the following indicates a neutralization reaction correctly?1. 2HCl (aq) + Zn (s) -----> ZaCl2 (aq) + H2 (g)2. HCl + NaOH -----> H2O (l) + NaCl (aq)3. H2O (l) + Na (s) -----> NaOH (aq) + H2 (g)4. CaCO3 (s) -------> CaO (s) + CO2 (g) 15. Which of the following statements made on metallic and non-metallic elements is not true?1. Metallic elements easily form cations.2. All non-metallic elements easily form anion.3. All metallic elements are electrical conductors.4. All non-metallic elements are electrical insulators. 16. A solution is prepared by dissolving 18g of glucose (C6H12O6) in water and diluting the solution to 500 cm3. Theconcentration of the solution is1. 0.02 mol dm-32. 0.20 mol dm-33. 2.0 mol dm-34. 20.0 mol dm-3 17. Which of the following doesn’t affect solubility?1. Temperature2. Nature of the solute3. Volume of the solvent4. Nature of the solvent 18. How does two acids undergo ionization in water is shown below.H3PO4------>(aq) 2H+ (aq) + HPO4-2(aq)H2SO4 ------> (aq) 2H+ (aq) + SO4-2(aq)Hence1. H3PO4 and H2SO4 are strong acids.2. H3PO4 and H2SO4 are weak acids.3. H3PO4 is a strong acid and H2SO4 is a weak acid.3. H3PO4 is a weak acid and H2SO4 is a strong acid 19. Electron configurations of some elements are as follows.A. 2, 1 B. 2, 2 C. 2, 6 D 2, 7Which of the following gives the charge of the stable ion formed by these elements respectively?1. +1, +2, -2, -12. -1, -2, +1, +23. +1, -2, +2, -14. -1, +2, +1, -1 20. The graph shows the variation of the current flowing between the two ends of the conductor with thepotential difference. the resistance of this conductor is, 1. 0.25 Ω2. 4.0 Ω3. 3.24 Ω4. 4.5 Ω 21. The velocity of an object of mass “M” increases from 1ms-1to 3ms-1. In these two instances the ratio of thekinetic energy of the object is,1. 1 : 32. 3 : 13. 9 : 14. 1 : 9 22. In this experiment, the egg moved up through the solution with the dissolving of sodium chloride because of,1. The increase in the density of the solution.2. The decrease in the density of the egg.3. The decrease in the density of the egg and the increase in the density of the solution.4. The increase in the density of the solution than the density of the egg. 23. Which of the following is incorrect about the solubility?1. The solubility of a gas increases when the temperature increases.2. Salt doesn’t dissolve in kerosene but dissolves in water.3. The mass of the powder of CuSO4 is greater than the mass of specks of CuSO4 which dissolves in 100ml of water at the room temperature.4. Styrofoam doesn’t dissolve in water but dissolves in Petrol. 24. Which of the following is the correct statement about muscle cells?1. Skeletal muscle cells and cardiac muscle cells are straited.2. Smooth muscle cells and cardiac muscle cells are straited.3. Skeletal muscle cells and smooth muscle cells are straited.4. Skeletal muscle cells, smooth muscle cells and cardiac muscle cells are straited. 25. Wattages of several electrical appliances are as follows.A. Washing machine - 250 WB. Soldering gun - 25WC. Colour television - 600 WD. Immersion heater - 1500 WWhich of the above consumes the highest amount of electrical energy per minute?1. A2. B3. C4. D 26. The amount of the heat required to convert a kilogram of water at 1000 0C to stem at 1000 0C?1. The specific heat of evaporation of water.2. Specific latent heat of fussion.3. The specific heat capacity of water.4. Specific latent head of vaporization. 27. Select the current statement about carbon dioxide. (C = 12, O = 16)1. The mass of one mole of carbon dioxide is 28g.2. The number of carbon atoms a mole of carbon dioxide is half the number of oxygen atoms.3. The number of moles of oxygen atoms in one mole of carbon dioxide is one.4. The number of carbon dioxide molecules contained in one mole of carbon dioxide is 3.011 x 10 23 . 28. If 200 ml of a sodium hydroxide solution contains 0.1 mol of sodium hydroxide, the composition of the solution in gdm-3.1. 22. 43. 204. 40 30. Which of the following is a longitudinal wave?1. Ripples on the surface of water.2. Waves that come through the air from a violin to the ear.3. Waves formed by the vibrations of a string of a guitar.4. Heat waves that come to a person near a burning fire. 31. Metal ‘X’ reacts with diluted acids and emits Hydrogen. Where could it be placed in the active metal series?1. Between Ag and Au2. Between Cu and Hg3. Between Pb and Cu4. Between Al and Fe 32. The four statements given below are regarding the Lub – Dup sound of the heart-beat.A. ‘Lub’ sound is formed at the closure of bicuspid and tricuspid valves.B. ‘Lub’ sound is formed at the closure of semi-lunar valves.C. ‘Dup’ sound is formed at the closure of bicuspid and tricuspid valves.D. ‘Dup’ sound is formed at the closure of semi-lunar valves. What is the answer with correct statement?1. A and B2. A and C3. A and D4. B and D 33. Select the false statement out of the followings1. Water and acid are essential components for rusting of iron.2. Acids and minerals are factors that accelerate the process of rusting.3. Bases decrease the speed of rusting.4. Cathode protection prevents rusting. 34. Which of the following elements produces an amphoteric oxide? Na, Mg, Al, S, P1. Na2. Mg3. S4. Al 35. The compound that releases H+ ions through fractional ionization in an aqueous solution is1. HNO32. H2CO33. H2SO44. NaOH 36. A solid was gradually heated and the temperature variation of the solid through the heating process is shown in the grap.The freezing point of the solid is approximatel1. -50 0C2. 150 0C3. 25 0C4. 250 0C 37. The Sodium (Na) atom has 11 protons, 12 neutrons and 11 electrons. The standard method of writing thatatom is,1234 38. Few statements are regarding inheritance are given below.A. Monohybrid cross is studying about the inheritance of only one characteristic of a single pair ofcontrasting characteristics.B. Transmission of inherited characteristic to next generation is known as heredity.C. Inherited characteristic cannot skip a few generations and transmit to another generation.The true statements of the above are,1. A and B2. A and C3. B and C4. A, B and C 39) What is the most suitable indicator to identify separately two solutions which contains lime juice and gastricjuice?1. Litmus paper2. P H papers3. Methyl orange4. Phenolphthalein 40) The average temperature of the human body is 37C. this temperature in the Kelvin scale is,1. 2362. 2733. 3104. 337 29. L1 and L2 are convex and concave lenses with focal lengths of25cm and 20cm respectively. A point object “O” is placed at a distance of 25cm from L1. The final image after refraction through both lenses are placed,1. At infinity left to the convex lens. O2. At a distance of 25cm left to the convex lens.3. At a distance of 20cm left to the concave lens.4. At infinity right to the concave lens. Time is Up! Time's up Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.