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0755 27 93 17 Channa Asela 071 4 820 596 Discipline, Knowledge & Results Download questions from www.OLscience.com In each of the questions, pick one of the alternatives (1), (2), (3), (4) which you consider is correct or most appropriate. Grade 10 – March 2011 Name : ………………………………………………………………………………………………………………………………………………… 1) What component of blood destroy micro-organisms? (1) Red blood cells (2) Plasma (3) White blood cells (4) Platelets 2) In which vessel contains oxygenated blood? (1) superior vena cava (2) inferior vena cava (3) pulmonary vein (4) portal vein 3) Human white blood cells always (1) contain fibrin (2) contain a nucleus (3) biconcave (4) haemoglobin 4) Which area of the heart contains the tri cuspid valve? (1) at the base of the pulmonary artery (2) at the base of the aorta (3) between the left atrium and the left ventricle (4) between the right atrium and the right ventricle 5) Patient who is suffering from leukemia (blood cancer) (1) his white blood cells will increase unusually (2) his white blood cells will reduced unusually (3) his red blood cells will increase unusually (4) his red blood cells will decreased unusually 6) A type of a white blood cell which has no granules (agranular) (1) neutrophils (2) eosinophils (3) monocyte (4) basophils 7) Which blood cell does not contain a nucleus? (i) monocyte (ii) lymph cells (iii) platelets (iv) eosinophils 8) Which human white blood cell is more in percentage? (i) eosinophils (ii) basophils (iii) monocyte (iv) neutrophils Page : 1 0755 27 93 17 Channa Asela 071 4 820 596 Discipline, Knowledge & Results Download questions from www.OLscience.com 9) There are three statements regarding arteries & veins A – Arteries have no valves. Veins have valves B – Walls of the arteries & veins have been formed equally C – Unlike in veins, the blood in arteries flows in a higher pressure Which of the above statements are correct? (1) A and B only (2) B & C only (3) A and C only (4) A, B and C 10) Dengue can be identified due to the decreased amount of (i) neutrophils (ii) eosonophils (iii) basophils (iv) platelets 11) Select the correct statement regarding the function of the heart (i) Right atrium contracts after the contraction of left atrium (ii) Right ventricle contracts after the contraction of left ventricle (iii) left & right ventricles contract after the contraction of left & right atria (iv) right atrium & right ventricle contracts after the contraction of left atrium & left ventricle 12) The ratio of red blood capsules to white blood capsules in the blood of normal healthy person is about 600:1. However during an infection this ratio changes to around 100:1 In such case (1) (2) (3) (4) more white corpuscles have been formed more red corpuscles have been destroyed blood has got diluted red corpuscles have destroyed the white corpuscles 13) Which of the following processes utilizes carbon dioxide of the atmosphere? (1) Respiration (2) Transpiration (3) Photosynthesis (4) Decay 14) The genes that transmit characteristics from parents to off-springs are found in (1) Mitochondria (2) Vacuoles (3) Cytoplasm (4) Chromosomes (3) C, H and N (4) C, H, O and N 15) The elements contained in glucose are (1) C and H (2) C, H and O Page : 2 0755 27 93 17 Channa Asela 071 4 820 596 Discipline, Knowledge & Results Download questions from www.OLscience.com 16) The process by which living cell obtains energy is (1) Excretion (2) digestion (3) respiration (4) fission 17) Which of the following could not be a product of respiration in plants? (1) Carbon dioxide (2) Energy (3) Oxygen (4) Water (3) Water (4) Energy 18) A product of photosynthesis in plant is (1) Carbon dioxide (2) Oxygen 19) Which of the following is responsible for the transmission of hereditary characteristics of man from one generation to the other? (1) Cell wall (2) Cytoplasm (3) Mitochondria (4) Genes 20) Which of the following is found in plant cells but not in animal cells? A-Cell wall B-Central vacuoles (1) A and B C-Nucleus (2) A and C D-Plasma membrane (3) B and C (4) A and D 21) A structure that can be seen only in plant cells, but not in animal cells (1) vacuole (2) golgi body (3) plasma membrane (4) endoplasmic reticulum 22) Which of the elements indicated below are isotopes? Element number of neutrons mass number A 146 238 B 146 239 C 144 239 D 147 239 (1) A & B (2) B & D (3) A & D (4) A & C 23) The mass number of an atom of the element X is 39. Its atomic number is 19. Which of the following statements are correct, regarding this element? (A) the number of protons contain in an atom X is 19 (B) the number of neutrons contained in an atom of X is 39 Page : 3 0755 27 93 17 Channa Asela 071 4 820 596 Discipline, Knowledge & Results Download questions from www.OLscience.com (C) the number of electrons contained in an atom of X is 39 (D) The number of neutrons contained in an atom X is 20 (1) only A and B are correct (2) only B and C are correct (3) only C and D are correct (4) only A and D are correct 24) Which of the following ions have the same number of ‘e’similar to the chloride ion (Cl-)? (1) Na+ (2) K+ (3) O2- (4) Mg2- 25) The modern periodic table is based on the feature, (1) mass number (2) atomic number (3) atomic volume (4) ‘e’ configuration 26) To which group does the element having the electronic configuration of 2,8,1 belong? (1) Group I (2) Group II (3) Group III (4) Group IV 27) The number (p), (e) (n) contained in an atom of the two varieties X and Y are shown Element X Y p 16 16 e 16 18 n 18 17 Which of the following, regarding X and Y, is correct? (1) X is a cation (2) Y has greater mass than X (4) X and Y are different elements (4) Y is an anion 28) Which of the following gases cannot be considered as a rare gas? (1) Helium (2) Argon (3) Nitrogen (4) Neon 29) Which of the following ion’s number of ‘e’ are equal to the number ‘e’ in fluoride ion (The atomic numbers of the elements O=8, F=9, Na=11, Cl=17 and Ca=20) (A) O2- (B) Na+ (C) Ca2+ (D) Cl(1) A and B (2) B and C (3) C and D (4) A and D 30) In the atoms of two elements found in the same period of the periodic table, (1) number of electrons is equal (2) number of protons is equal (3) number of neutrons is equal Page : 4 0755 27 93 17 Channa Asela 071 4 820 596 Discipline, Knowledge & Results Download questions from www.OLscience.com (4) number of energy levels is equal 31) Element X Y p 16 16 e 16 18 n 18 17 Three statements regarding the above X and Y atomic species are given below (A) the atomic numbers of X and Y are equal (B) the atomic mass of X and Y are equal (C) the electronic configurations of X and Y are equal Out of the statement, the correct one/ones is/are (1) A only (2) B only (3) C only (4) A and C only 32) The atomic number of an element is 19. The number of ‘e’in its outer most energy level is (1) 1 33) 40 18X (2) 9 (3) 18 (4) 19 are given below. Which one is the correct statement? (1) the atomic number is 40 (2) the mass number is 18 (3) there are 40 ‘e’, out side the nucleus (4) there are 18 protons in the nucleus 34) The element 4020 X, forms an ion in the form X2+. Number of electrons, equal to the number of electrons in that ion is contained in (1) Na+ (2) K+ (3) F- (4) Al+3 35)Following are some features stated about the element 63 29X (a) Its mass number is 63 (b) Its atomic number is 63 (c) The number of neutrons in its atom is 29 (d) The number of electrons in its atom is 29 Which of the above statements are correct? (1) a and c only (2) b and c only (3) a and d only (4) b and d only 36) There are 11 ‘p’ and 12 ‘n’ in an atom of the element Na. Which is the standard way? (1) 12 11 Na (2) 11 12 Na (3) 23 11 Na (4) 11 23Na 37) A monatomic gas is Page : 5 0755 27 93 17 Channa Asela 071 4 820 596 Discipline, Knowledge & Results Download questions from www.OLscience.com (1) Nitrogen Particles A B C D E (2) Hydrogen No. of protons 17 18 19 20 20 No of neutrons 20 20 20 20 22 (3) Helium (4) Oxygen No of electrons 18 18 18 20 20 38) The isotopes are (1) A and B (2) A, B and C (3) D and E (4) A, B, C and D 39) A positive ion is (1) A (2) B (3) C (4) D 40) The neutral particle / particles is / are (1) B only (2) D only (3) B and D only (4) B, D and E only Page : 6