Science-Class-9 DPP Talent Search Examinations

Each question has four alternatives marked (A), (B), (C) and (D), but only one of these alternatives is the correct answer. Find the correct answer. 1. A train accelerated uniformly from rest until a speed of 72 km/hr was attained. It maintained this speed and passed 35 km mark after 30 minutes from start. The acceleration of the train was Rough Work (A) 0.1 ms–2 (B) 0.2 ms–2 (C) 0.4 ms–2 (D) 0.5 ms–2 2. In the above problem, the distance travelled by the train during the time of acceleration was (A) 1.0 km (B) 1.5 km (C) 2.0 km (D) 3.0 km 3. Cell has many organelles which perform different functions. The golgi apparatus performs functions of and ............., plastids like chloroplast ............., mitochondria ............. and at the surface of ribosome takes place. Fill in the blanks with proper functions given below and tick-mark() the correct filling of the blanks. (1) storage (2) packaging (3) protein synthesis (4) produce energy by oxidation of food (5) manufacture food (A) 1, 2, 3, 4, 5 (B) 2, 3, 4, 5, 1 (C) 3, 4, 1, 2, 5 (D) 1, 2, 5, 4, 3 [2] 4. Match the statements of Column I and Column II and tick-mark() the correct matching, given as one of the four alternatives A, B, C and D. Column I Column II (a) Pisces (i) salamander (b) Aves (ii) electric ray (c) Amphibia (iii) turtle (d) Reptilia (iv) ostrich (A) (a) - ii, (b) - iii, (c) - iv, (d) - i (B) (a) - ii, (b) - iv, (c) - i, (d) - iii (C) (a) - i, (b) - iii, (c) - ii, (d) - iv (D) (a) - ii, (b) - iv, (c) - iii, (d) - i 5. Annelids are the first animals with true body cavity. Tick-mark() the one of the following animals which does not belong to the group Annelida ? (A) Earthworm (B) Sandworm (C) Round worm (D) Sea mouse 6. Sublimation is a process in which a solid directly changes into gaseous form. Which one of the following substances sublimates on heating ? (A) Calcium chloride (B) Barium chloride (C) Ammonium chloride (D) Sodium chloride 7. If the size of particles lies between 10–9 m and 10–6 m then the particles are called colloids. The solution containing colloids is called a colloidal solution. Tick-mark() the correct statement about a colloidal solution. (A) Colloidal solution is a homogeneous mixture (B) The colloidal particles settle down, when the colloidal solution is kept undisturbed for some time (C) The colloids can be separated from its solution by filtration (D) The presence of colloids in a solution can be detected by passing light through the colloidal solution Rough Work [3] 8. The velocity-time graph of a body in motion is given as under : Rough Work The average velocity of the body during first 30 seconds of its motion is (A) 12.5 ms–1 (B) 10.0 ms–1 (C) 15.0 ms–1 (D) 7.5 ms–1 9. In the above problem the maximum magnitude of rate of change of velocity is (A) 0.75 ms–2 (B) 1.00 ms–2 (C) 1.25 ms–2 (D) 1.50 ms–2 10. Tick-mark() the incorrect statement from the following. (A) Sclerenchyma makes the plant hard (B) The walls of sclerenchyma are thick due to calcium carbonate deposition (C) The sclerenchymatous cells are dead (D) The sclerenchyma provides strength to the plant parts 11. Xylem is a tissue in plants which conducts water and minerals from soil to the leaves. It consists of several parts. Which one of the following in not a part of xylem ? (A) Tracheids (B) Vessels (C) Xylem parenchyma (D) Xylem chlorenchyma [4] 12. Which one of the following is the correct electronic/atomic configuration of Argon-40 ? Rough Work 13. Arrange the following elements with increasing atomic numbers : Chlorine, Neon, Boron, Phosphorus, Calcium, Beryllium (A) Be < B < P < Ne < Cl < Ca (B) Be < B < Ne < Cl < P < Ca (C) B < Be < Ne < P < Cl < Ca (D) Be < B < Ne < P < Cl < Ca 14. Two bodies of masses 1 kg and 4 kg have equal momentum. If difference of their kinetic energies is 12 J, find the kinetic energy associated with the body of smaller mass. (A) 18 J (B) 20 J (C) 15 J (D) 16 J 15. Atomic mass of chlorine is taken as 35.5, which is not a whole number. The reason for this is that chlorine has two isotopes and the mixture of these isotopes has fixed ratio in the nature. The ratio of isotopes of chlorine 35 Cl and 37 Cl 17 17 can be calculated, from this information, as (A) 4 : 1 (B) 3 : 1 (C) 5 : 2 (D) 7 : 2 [5] 16. Blood has different parts which perform different functions. Match the statements of Columns I and II and tick-mark() the correct matching, given as one of the four alternatives A, B, C and D. Column I Column II (a) RBCs (i) clotting of blood (b) WBCs (ii) transport of oxygen (c) Platelets (iii) transport of carbon dioxide (d) Plasma (iv) fight with germs (A) (a) - i, (b) - ii, (c) - iii, (d) - iv (B) (a) - ii, (b) - iii, (c) - iv, (d) - i (C) (a) - ii, (b) - iv, (c) - i, (d) - iii (D) (a) - ii, (b) - i, (c) - iii, (d) - iv 17. Blood carries many components. Which one of the following is not carried by the blood ? (A) Oxygen (B) Carbon dioxide (C) Enzymes (D) Hormones 18. Which one of the following is the correct molecular structure of white phosphorus ? (A) P5 (B) P4 (C) P3 (D) P2 19. What mass of sulphur is present in 2.4 g of sulphuric acid ? (A) 0.80 g (B) 0.817 g (C) 0.98 g (D) 0.784 g 20. A body is thrown along the horizontal ground with an initial velocity of 20 ms–1. If the body stops in 200 seconds, find the distance travelled by the body during its motion. (A) 1,000 m (B) 2,000 m (C) 500 m (D) 1,500 m Rough Work [6] 21. A wooden cubical cylinder of base area 4 cm × 4 cm is floating vertically in water with 6 cm of its length out of water. When body A is put gently on its upper face, only 1 cm of the cylinder remains above water. The weight of the body A is Rough Work (A) 16 g wt (B) 40 g wt (C) 80 g wt (D) 96 g wt 22. A stone is just released from the top of a tower 120 m high and at the same time another stone is projected vertically upward from the ground, with a velocity of 30 m s–1. Find the height above the ground, when the stones meet or cross each other, if g = 10ms–2. (A) 80 m (B) 60 m (C) 40 m (D) 30 m 23. Scattering of a beam of light by colloidal particles in a medium is called (A) Rayleigh effect (B) Raman effect (C) Brownian effect (D) Tyndal effect 24. Which one of the following is not correctly matched ? I II (A) Smooth muscles spindle shaped (B) Striped muscles involuntary (C) Skeletal muscles attached to skeleton (D) Cardiac muscles involuntary [7] 25. Tick-mark() the correct statement from the following. (A) Tendons join skin to muscles (B) Tendons join muscles to muscles (C) Tendons join muscles to bones (D) Tendons join bones to bones 26. Two bodies A and B of masses 4 kg and 1 kg, respectively, are moving along the same straight line but in opposite directions. The velocity of A is 5 ms–1 and that of B is 8 ms–1. After the collision, the two bodies stick together. Find their combined velocity after the collision. Rough Work (A) 2.0 ms–1, in the direction of motion of A (B) 2.4 ms–1, in the direction of motion of A (C) 0.75 ms–1, in the direction of motion of B (D) The bodies come to rest after the collision 27. A bullet of mass a and velocity b is fired into a large block of wood of mass c and the bullet does not escape the block. The final velocity of the system would be (A) b c a  b (C) a b a  c (B) a c a  b (D) b c a  c 28. Particles of matter have some characteristics. Which one of the following characteristics in not correctly shown by the particles of matter ? (A) Particles of matter have space between them (B) Particles of matter are in continuous motion (C) Particles of matter repel each other when heated (D) Particles of matter attract each other [8] 29. Match the statements of Column I and Column II and tick-mark() the correct matching, given as one of the four alternatives A, B, C and D. Column I Column II (a) Malaria (i) fungus (b) Jaundice (ii) protozoa (c) Typhoid (iii) virus (d) Ringworm (iv) bacteria (A) (a) - iii, (b) - iv, (c) - i, (d) - ii (B) (a) - iv, (b) - i, (c) - ii, (d) - iii (C) (a) - i, (b) - ii, (c) - iii, (d) - iv (D) (a) - ii, (b) - iii, (c) - iv, (d) - i 30. Tick-mark() the incorrect statement from the following. (A) Earthworms are instrumental in making the rich humus (B) The rivers carry many nutrients from the land to the sea which are used by the marine organisms (C) Nitrogen is an essential nutrient for life-forms (D) Nitrogen-fixing bacteria play important role in the nitrogen cycle as these convert nitrates and nitrites into elemental nitrogen 31. Fill in the blanks with proper words in the following paragraph and choose the correct option, given below. The nucleus contains chromosomes which are visible as ............. structure only at the time of ............. . Chromosomes carry ............. from parents to the next generation. Chromosomes are composed of ............. . (A) round-shaped, cell division, hereditary characters, DNA (B) oval-shaped, cell division, hereditary characters, RNA (C) rod-shaped, cell division, hereditary characters, DNA (D) rod-shaped, cell division, hereditary characters, RNA [9] 32. Sulphur exists in the form of molecules having some number of atoms in each molecule. How many atoms are present in each molecule of sulphur ? (A) 8 (B) 6 (C) 4 (D) 2 33. Which one of the following nutrients is not supplied to the plants directly from the atmosphere or water ? (A) Carbon (B) Nitrogen (C) Hydrogen (D) Oxygen 34. Match the statements of Column I and Column II and tick-mark() the correct matching, given as one of the four alternatives A, B, C and D. Column I Column II (a) Atom is indivisible (i) Ernest Rutherford (b) Discovery of electron (ii) Neils Bohr (c) Discovery of nucleus in atom (iii) John Dalton (d) Structure of atom (iv) James Chadwick (e) Discovery of neutron (v) Joseph John Thomson (A) (a) - iii, (b) - v, (c) - iv, (d) - ii, (e) - i (B) (a) - iii, (b) - i, (c) - v, (d) - ii, (e) - iv (C) (a) - iii, (b) - v, (c) - ii, (d) - i, (e) - iv (D) (a) - iii, (b) - v, (c) - i, (d) - ii, (e) - iv 35. Tick-mark() the incorrect statement from the following. (A) Molecular forces are stronger than atomic forces (B) Naphthalene balls disappear with time, not leaving any solid behind (C) An alloy is a mixture of two or more elements (D) Evaporation takes place at all the temperatures whereas boiling takes place at fixed temperature [10] 36. A louder sound has more energy. Therefore, a louder sound can travel (A) at a faster speed through a medium (B) with a faster frequency through a medium (C) a larger distance through a medium (D) even through vacuum 37. Conservation of momentum is the consequence of (A) Newton’s third law of motion (B) Newton’s second law of motion (C) Newton’s first law of motion (D) Newton’s all the three laws of motion 38. Earth is orbiting around the sun in elliptical path with an average speed of 30 km per second (very large, of course). At which position (shown in diagram), the speed of the earth would be maximum ? (A) When the earth is at position A (B) When the earth is at position B (C) When the earth is at position C (D) The speed of the earth is same at all the positions 39. Tick-mark() the incorrect statement from the following. (A) Plant cells have cell wall but animals cells do not (B) Both plant and animal cells have ribosome (C) Both plant and animal cells have mitochondria (D) Both plant and animal cells have plastids [11] 40. Fill in the blanks with proper words in the following paragraph and choose the correct option, given below. The disease-causing microbes enter our body through different means. For example : (i) Malaria-causing ..................., entering through mosquito bite, will go to ............ and then to ............ ............ ............ . (ii) An infection, like HIV, comes into the body via the ............ ............ and spreads to ............ ............ all over the body. (A) microbes, lungs, red blood cells, sexual organs, lymph nodes (B) microbes, liver, white blood cells, sexual organs, brain (C) microbes, lungs, white blood cells, sexual organs, lymph nodes (D) microbes, liver, red blood cells, sexual organs, lymph nodes [12] ANSWERS : CLASS IX SCIENCE 1 B 2 A 3 D 4 B 5 C 6 C 7 D 8 B 9 C 10 B 11 D 12 B 13 D 14 D 15 B 16 C 17 C 18 B 19 D 20 B 21 C 22 C 23 D 24 B 25 C 26 B 27 C 28 C 29 D 30 D 31 C 32 A 33 B 34 D 35 A 36 C 37 A 38 C 39 D 40 D [13]