KVPY 2011PHYSICS Q1. An object is stationary if distance time graph is (a) Parallel to distance - axis (b) (c) (d) Q2. Parallel to time - axis A straight line having constant slope A straight line having variable slope Figure shows the distance - time graph of your children A, B, C and D. which child has highest speed? B D d i s t a n c e C A t im (b) A (d) Q3. (b) D 20km/h2 (c) 10km/h2 (d) e B (c) C A car is moving with a uniform velocity of 40km/h. its acceleration after 1 hour is (c) 40km/h2 Q4. (b) Zero Slope of a velocity - time graph gives (d) Distance (b) Displacement (c) Acceleration (d) Speed Q5. A particle is moving in a circular path of radius r. the displacement after half a circle would be. πr 2r (e) Zero 2 πr Q6. (b) (c) (d) A body A starts from rest and moves with a uniform acceleration along a straight line. Another body B has some initial velocity and moves with larger acceleration than that of A. the correct velocity line graphs of A & B are represented as A v e l o c i t y B t i m e (b) (f) B v e l o c i t y A t i m e A v e l o c i t y B (c) t i m e (d) A B v e l o c i t y t i m Q7. e Uniform circular motion of an object is (g) Non-accelerated (b) Accelerated (c) Uniform (d) None of these Q8. Speedometer measures (h) Speed (b) Average speed 546 K −273K . 546 K (c) 273 K. −279K . low pressure pressure (c) Low temperature. The correct observation is 0 (k) Temperature falls and becomes constant at −4 C . 0 (l) Temperature falls and becomes constant at 0 C till the whole ice melts.time graph (i) Is constant (b) Zero Increases (c) Decreases (d) Q10. Liquid ‘A’ boils at 500C and liquid ‘B’ at 1000C. Instantaneous speed (d) All of these The speed of an object decreases if slope of distance . 0 K (d) (b) 273 K. He takes a beaker half filled with ice and dips a thermometer in it. then it starts increasing. the correct sequence of temperature will be (q) 273 K. (o) ‘A’ (c) Both ‘A’ and ‘B’ (p) Low temperature. 0 0 0 On converting 0 C . (m) Temperature falls and ice starts melting with increase in temperature.3 seconds to reach the earth from moon.9 × 105 m Q11. Q12. high Q13.5 × 105 km (c) 3. 0 K .9 × 105 km (d) 3. −6 C . A radio signal takes 1. At room temperature ( 30 C ) 0 a student sets up an apparatus to determine the melting point of ice. A gas can be liquefied at Q14.(c) Q9. 279 K. low pressure (b) (d) (b) ‘B’ None of these High temperature. 267 K. Distance of moon from earth is 5 (j) 3 × 10 km (b) 3. 273 C into Kelvin. If the speed of 8 the signal is 3 × 10 m / s . high pressure (d) High temperature. which of them is more volatile. 267 K. 0 (n) Temperature keeps on falling tell −4 C . vaporization Solubility o solid in liquid. kinetic energy. Improving soil fertility (d) Proliferating weeds. (r) Diffusion only (b) (c) (d) Diffusion and kinetic energy Diffusion. What will be boiling point of water at hill station? (v) 1000C (b) (c) (d) Q20. which of the following is correct observation? Q17. kinetic energy. Rotation of crops helps in (aa)Attacking insects nature of soil (c) Q22.Q15. < 1000C > 1000C Either less than 1000C or more than 1000C (w) Gases can diffuse in gas. Which one of the following will not undergo sublimations (u) Naphthalene (c) Iodine (b) (d) Camphor Potassium chloride Q19. liquid and solids having pores (x) Liquid can diffuse in solids and liquids (y) Solids can diffuse in solids (z) Solids can’t diffuse in liquids Q21. diffusion. When salt in dissolved in water. Which of the following increase with increase in temperature. The process of cross breeding two different verities of crop plants each having (b) Altering chemical Which of following is incorrect statement? . vaporization. Which condition of the following will increase the rate of evaporation? Q18. (s) The level of water increases (b) (c) (d) The level of water decreases The level of water remains the same The level of water first decreases and then increases (t) Increase in temperature of water area of water (c) Increase in humidity in atmosphere (d) Decrease in wind speed (b) Less exposed surface Q16. Find out the correct sentence about manure (ll) Manure contains large quantities of organic matter and less quantity of nutrient (mm)It increases water holding capacity of sandy soil (nn)It helps in draining out excess water from clayey soil (oo)It excessive use pollutes environment because it is made from animals excretory (pp)i. (b) (d) It is water insoluble It is compact and easy (b) It supplies nitrogen It allows leaching . It prevents soil erosion (dd)Mixed cropping Q25. iii (c) iii. Which of the following nutrient is not available of fertilizer (qq)Nitrogen (b) Iron Phosphorus (c) Potassium (d) (b) ii. (b) Creasing (c) Hybridization (d) Introduction Which of the following is incorrect for green manure (cc)It supplies organic matter (c) Q24. iii ii. iii Q29. iv (d) i. necessary. (b) Potassium (c) Nitrogen (d) Boron To solve the food problem in our country which among the following is (hh)Increased production and storage of food grain (ii) Easy access of people to the food grain (jj) People should have money to purchase the grains (kk)All of the above Q28. (b) (d) Mixed farming Sustainable agriculture involves (c) Crop rotation (d) All of the above Which of the following is incorrect about fertilizer (ee)It is nutrient specific (ff) It is readily absorbed by plants to transport Q26doubt. Which of the following is a micronutrient (gg)Phosphorus Q27.desired characteristic is known as: (bb) Selection Q23. An electric iron draws a current of 4A when connected to a 220V mains. Preventive and control measure adopted for storage of grains include. (ss) 1000 Ω Q32. Its resistance must be. (b) 44 Ω (c) 55 Ω (d) none of these Identify the circuit in which the electrical components have been properly + + (b) connected V + A - (tt) + + A + V + + V + (d) A (c) . (rr) Strict cleaning (c) Fumigation (b) (d) Use of neem leaves All of the above Q31.Q30. have (ww)Same current flowing through them when connected in parallel. When length of a conductor is increased the resistivity of material of conductor. (yy)Same potential difference across them when connected in series. A cell. + - - A + A + ( I ) . (xx)Same current flowing through them when connected in series. Q36. Maximum in (II) circuits What is the maximum resistance which can be made using five resistors each of (b) (d) Maximum in (III) Same in all three (vv) 1Ω (b) 25 Ω (c) 5Ω (d) None of these Q35.+ ( I I ) - A + ( I I I ) The current recorded in the ammeter will be (uu)Maximum in (I) (c) Q34. 1 Ω 5 .+ + A + - V Q33. a key and ammeter are arranged as shown in circuit diagrams. (aaa)Increases (b) remains unchanged Two resistors of resistance 2 Ω and 4 Ω when connected with a battery will . a resistor. (zz)Different potential difference when connected in parallel. A substance that oxidizes itself and reduces others is known as (fff) Oxidizing agent (c) Dehydrating agent (d) (b) Reducing agent None of these . ohm per metre Which has more resistance. 30cm.section of the wires of same material and A 2 > A1 and if the current in the two conductors and I1 and I2 respectively then which of the following is correct. decreases (d) (b) ohm. metre (c) uncertain ohm. 3Ω 3Ω 3Ω 3Ω 3Ω The equivalent resistance of the resistors if connected as shown in the figure is (eee) 12 Ω (b) 6Ω (c) 15 Ω (d) None of these Q41. Same in both the resistance (b) (d) Wire of length 30cm Uncertain If A1 and A2 are the area of cross . or copper wire of length (ccc)Wire of length 12cm (c) Q39. metre2 (d) The unit of specific resistance is (bbb)Ohm Q38.(c) Q37. (ddd)I2 > I1 (b) I1 > I2 (c) I1 = I2 (d) None of these Q40. copper wire of length 12cm. x. decomposition FeSO4 . y. Which of the following reaction has not been correctly represented? (lll) BaCl 2( aq) + H2SO4( aq) BaSO 4 ↓ +2HCl ( aq) → Zn ( s) + H2SO4( aq)) ZnSO 4 ↓ +H2( g) → (mmm) C + O2( g) CO2( g) + heat → (nnn) ( s) . SO3 FeSO4 . y. decomposition (b) 3. A. In the reaction 2H2S + SO2→ 2H2O + 3S . 1 Q44. CuSO4 . 4. 4. gets oxidized to reddish brown solid in presence of air. B and type of reaction is (a) (b) (c) (d) Q45. Fe2O3 . decomposition . SO2 . x x. z in balanced equation respectively are (hhh)3. 3 (d) . decomposition . Fe2O3 . Fe. SO2 The following reaction is an example of 4NH3( g) + 5O2( g) → 4NO( g) + 6H2O ( l ) (iii) Displacement reaction (ii) (iii) Redox reaction (b) (ii) and (iii) (iii) and (iv) (jjj) (i) & (ii) Combination reaction (iv) (c) neutralization reaction (i) and (iii) (d) Q46. SO2 . SO3 . 2 (c) 2.Q42. ‘A’ turns acidified potassium dichromate solution green. choose the statement which is false. ‘x’ on heating gives brown coloured solid ‘y’ and two pungent smelling gases ‘A’ and ‘B’. 4. 4. time? Which of the following can be used for storage of fresh sample of an oil for a long (kkk)Carbon dioxide or oxygen (b) (c) Carbon dioxide or Helium (d) Nitrogen or chlorine Helium or nitrogen Q47. SO3 FeSO4 . SO2 . (c) H2S is reduced (d) (ggg) H2S is oxidized (b) Fe + y H2O → Fe3O4 + z H2 SO2 is reduced All are correct Q43. A compound ‘x’ green coloured solid. SO3 . 4 3. CuO. Which one of the following is not a chemical reaction. Which of the following reaction is not a redox reaction as well as a displacement reaction? (ppp) 2HgCl 2 + SnCl 2 Hg2Cl 2 + SnCl → 4 → (qqq) ZnO + C Zn + CO (rrr) 2Al + 6HCl 2Al Cl 3 + 3H2 → H2S + Cl 2 2HCl + S → (sss) Q49. (uuu)Souring of milk (c) body Dissolution of sugar in water Rusting of iron Digestion of food in our . Which one of the following is not a balanced equation? → (ttt) Fe + Cl 2 FeCl 3 Mg + CuSO4 MgSO4 + Cu → (c) NaOH + HCl NaCl + H2O → (d) (b) (d) Zn + S ZnS → (b) Q50.(ooo) ∆ 2KCl O3( s) 2KCl ( s) + 3O2 ↑ → Q48. (b) CO2 (c) Glucose (d) Dictyosomes Respiratory tract is lined with ciliated epithelium. What is the correct sequence of parts in human alimentary canal? (gggg)Mouth " oesophagus " stomach " large intestine " small intestine . (vvv)Osmosis (b) Diffusion (c) Imbibition (d) All the above Q52. Gaseous exchange occurs in lungs in the region of (aaaa)Trachea (b) Bronchi (c) Bronchioles (d) Alveoli Q57. Ionisation of water Reaction of CO2 with RuBP (c) Amylase (d) (b) Push out mucus with Proteolytic enzyme of pancreatic juice is (zzz)Pepsin (b) Trypsin Lipase Q56. This indicates that rice water contains (bbbb)Complex proteins (c) Simple proteins (b) (d) Fats Starch Q58. The correct sequence of anaerobic reaction in yeast is Cytoplasm mitochondria → → (cccc)Glucose pyruvate Ethanol + CO2 Cytoplasm Cytoplasm → → (dddd)Glucose pyruvate Lactic Acid Cytoplasm mitochondria → → (eeee)Glucose Pyruvate Lactic Acid Cytoplasm Cytoplasm → → (ffff)Glucose Pyruvate Ethanol + CO2 Q59. Trap germs (d) (b) (c) Push in air vigorously excitation of chlorophyll First step of photosynthesis is (yyy)Formation of ATP by photon (c) Q55.Q51. The function of cilia is to (xxx)Trap dust trappted germs (c) Q54. In simple organisms exchange of gases occurs through. Oxygen released dividing photo synthesis comes from (www)Water Q53. A few drops of iodine solution were added to rice water. The solution turned blueblack in colour. The least Q63.02 A (b) 0.2 A (b) Alloys (d) Both electrolytes and (d) 0.e.(hhhh)Mouth " stomach " oesophagus " small intestine " large intestine (iiii)Mouth " stomach " Oesophagus " small intestine " large intestine (jjjj)Mouth " Oesophagus " stomach " small intestine " large intestine Q60. A Rheostat in an electric circuit is connected to (a) Apply a constant resistance in the circuit (b) Apply a variable resistance in the circuit (c) To stop the flow of current in the circuit (d) to start the flow of current in the circuit Q65. A fuse wire in household circuit is connected in (a) Series (c) Series with earth wire wire Q66. Ohm’s law is not obeyed by (a) Electrolytes (c) Semiconductor diodes semiconductor Q64.1 A (b) Watt (c) Ampere (d) Volt An ammeter has 20 divisions between mark 0 and mark 2 on its scale. Q62. Which is the correct sequence of air passage during inhalation? (kkkk)Nostrils " larynx " pharynx " trachea " lungs (llll)Nasal passage " trachea " pharynx " larynx " alveoli (mmmm)Larynx " nostrils " pharynx " lungs (nnnn)Nostrils " pharynx " larynx " trachea " alveoli Q61. Which physical quantity remains unchanged in parallel combination. Joule per coulomb (i..01 A (c) 0. Joule/coulomb) is equivalent to (a) Ohm count of the ammeter is (a) 0. (a) Voltage (b) Current (c) Resistance (d) None (b) Parallel (d) Between live and neutral . To prepare a temporary mount of a leaf and to observe stomata. If four resistors each of value 1Ω are connected in parallel. the effective resistance of the combination is (a) 0. (a) It is a mixture of HCl and NaOH (b) It is a mixture of many indicators (c) It is a solution of phenolphthalein in alcohol (d) It is s solution of phenolphthalein in water Q70. (a) A dry leaf (c) The lower epidermis of leaf (b) A crushed leaf (d) The upper epidermis of a leaf Q75. We put the cover slips on the slide very gently to avoid . (b) Litmus paper (d) Standard value pH chart (b) HCl (c) Water (d) (b) 0. The sample should be (a) Tap water (c) Sodium hydroxide (b) Distilled water (d) Lemon juice Q73. The pH of a sample Y is found to be 10.25Ω (c) 4Ω (b) pH paper (d) Litmus solution (d) 4Ω Which one is a suitable method of fine the accurate pH value? Which one is correct statement about universal indicator? A colourless sample was tested with a strip of pH paper.of these Q67. What is the name of the reaction between HCl and NaOH? (a) Combination Neutralization (b) Displacement (c) Dissociation (d) Q74. (a) pH metre (c) Universal indicator Q69. The colour of the strip changed to reddish pink. we take. This sample may be which one of the following? (a) NaOH CH3COOH Q71.5Ω Q68. Which one of the following is not required to find the pH of a solution? (a) pH paper (c) Universal indicator Q72. photosynthesis experiment is called (a) Auxanometer (c) Potometer (b) Ganong’s light screen (d) Porometer . (a) Uncovered part of leaf (c) Both of these (b) Covered part of leaf (d) The entire leaf will become A metallic structure with a specific cut out used in the blue black Q80. Absorbing with cotton wool (b) Washing with CaCl2 In which of the following solvent leaf is boiled to remove chlorophyll? (a) Water Strach solution (b) Alcohol (c) Iodine solution (d) Q79. We place leaf peel in water so that (a) Peel remains green (c) Peel does not dry up Q77. (b) Crushing of the material (d) Folding of the material (b) Guard cells become rigid (d) Peel is washed The excess of stain while preparing a temporary stained mount of a leaf is removed by (a) Washing with water solution (c) Soaking with filter paper (d) Q78.(a) Entry of air bubbles (c) Oozing of glycerin Q76. Which of the following part of leaf will become blue-black after treatment with iodine solution. Seeds which are taken in the flask during respiration. (b) 3Ω (c) 2Ω (d) 1Ω Three resistors are connected in series with a battery. form of The energy produced as a result of respiration (aerobic and anaerobic) is in the (a) Fats (b) DNA (c) protein (d) ATP Q82. experiment must be (a) Dry Boiled (b) Just wet (c) Germinating (d) Q84. What will be the colour of the final mixture when excess of HCl is added to it? (a) Orange Colourless (b) Blue (c) Light pink (d) Q86. This is caused by the formation of which one of the following? (a) Calcium oxide (c) Calcium carbonate (b) Calcium chloride (d) Sodium Carbonate Q85. The current drawn from the battery is . Their equivalent resistance when connected in parallel will be (a) 6Ω Q89. The current in each resistor is 1. Their equivalent resistance is 18Ω . The basic nature of sodium hydroxide (NaOH) is due to the presence of which one of the following ion in solution (a) Hydrogen ions Sodium ions (b) Chloride ions (c) Hydroxide ions (d) Q87.5 A. Three resistors each of resistance 6Ω are connected in series. When a few droops of phenolphthalein are added to a solution of sodium hydroxide a pink colour is produced. Level of water will not increase if a small seedling is placed in place of germinating seeds because (a) No CO2 will be released (c) CO2 released will get used up by the plant (b) O2 will be released (d) None of the above Q83. What is the form of zinc metal available in the Chemistry Lab to be used for performing experiments? (a) As zinc filings (b) As zinc rod (c) As zinc granules (d) As zinc pellets Q88.Q81. A freshly prepared lime water become milky when carbon dioxide gas in passed through it. (uuuu)(i) only and (iii) (b) (ii) only (c) (iii) only (d) (i).5 A (b) Current (d) 1.5 A Q90.(a) 4. Out of the following the correct observation(s) made by him will be.0 A Which physical quantity remains unchanged in parallel combination (d) None of the above Q91. (ii) Q93. From the following sets tell which one represent a correct pictures of both the possible () reactions and impossible () reactions between metals and the solutions of different salts? Sets (a) (b) Metal Zn Fe ZnSO4 FeSO4 CuSO4 Al2(SO4)3 . A student added zinc granules to copper sulphate solution taken in a test tube. A more reactive metal displaces a less reactive metal from the aqueous solution of the later. (rrrr)Zinc granules have no regular shape. iron metal acts as: (vvvv)Oxidizing agent (c) Catalytic agent (b) dehydrating agent (d) Reducing agent Q94. In the reaction between iron and copper sulphate. Q92. (a) Voltage (c) resistance (b) 3A (c) 1. (ssss)Zinc granules have silvery grey colours (tttt)The colour of zinc granules changed to brown. Which of the following is not observed when a strip of aluminium is placed in ferrous sulphate solution? (oooo)Green colour of solution disappears (b) The solution becomes colourless (pppp)Dusty grey diposite is found on the surface of aluminium strip (qqqq)The solution becomes blue in colour. When a ray of light travels from air to glass and strikes the surface of reparation at 900. W1 − W2 × 100 W1 (b) W1 × 100 W1 − W2 (d) A student dissolved 15g of sugar m 250ml of distilled water in beaker A and 200g of sugar in 250ml of distilled water in beaker B. it appears to be raised by 1. (xxxx)Raisins in beaker A were swollen and in beaker B were shrunken. Q97.814cm (c) 2. After 10 hours he observed that. (aaaaa)Raisins in beakers A and B were shrunken.2cm.914cm (d) Q99.7 is placed on a cross marked on a sheet of paper. When a glass slab of RI = 1.90cm 2. The weight of dry raisins put into beaker A was equal to weight of dry raisins put into beaker B.8cm (b) 2. then it (ddddd)Bends towards the normal away from the normal (c) Passes unbent (eeeee)On increase in thickness of medium incidence. The thickness of glass slab is (ccccc)2. .Q95. On what factors does the lateral displacement of the emergent ray depends. Weight of dry raisins = 40g Weight of raisins after soaking = 60g The percentage of water absorbed by raisins is (bbbbb)25% (b) 50% (c) 60% (d) 80% Q98. (yyyy)Raisins in beaker B were swollen and in beaker A were shrunken. (zzzz)Raisins in beaker A and B were swollen. (c) Increase in refractive index of medium (a) All of these (d) Returns back into air. A student recorded following readings while performing the experiment. (b) On increase in angle of (b) Bends Q100. (c) Cu (d) Al The correct formula to calculate the percentage of water absorbed by raisins is W1 + W2 ×100 W1 (wwww) W2 − W1 × 100 W1 (c) Q96. Na. D (c) A. E (d) B. Which of the following is the correct sequence of events of sexual reproduction in (b) Endosperm (c) Nucleus (d) Both (b) Actinides (d) p-block elements (b) Metallic character (d) Number of shells in an (b) Na > Mg > Al > Si > Cl (d) Al > Mg > Na > Si > Cl (b) Mg (c) K (d) Ca Q104. fertilization. C. Which of the following elements found a place in the periodic table later? (fffff)Germinium Silicon Q102. Mg. 7. Arrange the following elements in the order of their decreasing metallic (b) B. Which of the following has larger atomic size? (hhhhh)Na character. embryo (ooooo)Seedling.Q101. 30 respectively belong to the same period? (ggggg)A. C E Q103. (b) Chlorine (c) Oxygen (d) Q105. Which three elements out of A. Which of the following does not increase while moving down the group of the . In Mendeleev’s Periodic Table. Al. (iiiii)Cl > Si > Al > Mg > Na (c) Mg > Na > Al > Si > Cl periodic table? (jjjjj)Atomic radius (c) Valence electrons element Q106. Si. fertilization. embryo. C. fertilization. B. The number of chromosomes in parents and offspring of a particular species (b) Style (c) Stigma (d) Ovary Q109. Receptive part of carpel is (mmmmm)Placenta a flower? (nnnnn)Pollination. E with atomic number 2. 14 elements after Lanthanum are called: (kkkkk)Lanthanides (c) d-block elements Q107. Cl. 10. seedling. pollination. Fertilization in flowering plants produces (lllll)Embryo (a) and (c) Q108. pollination (ppppp)Pollination. seedling (qqqqq)Embryo. fertilization Q110. B. 3. D. embryo. D. gaps were left for the element to be discovered later. D. seedling. 112. Water in deep sea appears bluish. (wwwww)Pollen grain on upper surface of stigma and ovule. orange (d) Red. (xxxxx)Pollen grain in anther and upper surface of stigma (yyyyy)Upper surface of stigma and lower part of style. The correct sequence of organs in the male reproductive system for transport of sperms is (zzzzz)Testis → vas deferns → urethra urethra (c) Testis → urethra → ureter → ureter Q114. yellow (c) Red. yellow (b) Yellow. (a) They reproduce asexually (c) They reproduce only sexually multicellular Q113. (vvvvv)Pollen grain and upper surface of stigma. green. green. It is due to the.remains constant due to (rrrrr)Doubling of chromosomes after zygote formation (sssss)Halving of chromosomes during gamete formation (ttttt)Doubling of chromosomes after gamete formation. spirogyra and yeast is that. Length of pollen tube depends on the distance between. (uuuuu)Halving of chromosomes after gamete formation. A feature of reproduction that is common to Amoeba. blue. (dddddd)Scattering of light Q115. blue . green. (cccccc)Absorption of light by the sea. (d) Testis → vas deferns (b) Testis → ureter → (b) They are all unicellular (d) They are all (aaaaaa)Presence of algae and other plants found in H2O (bbbbbb)Image of sky formed in water. Q111. The three primary or basic colours are (eeeeee)Red. (jjjjjj)The iris and eyelids are responsible for regulation of light. Q118. (b) Atmosphere reflection (d) Dispersion of light. The reason is (gggggg)The muscles connected to eye lens can adjust their focus. Choose the correct depiction for dispersion of white light on passing through a W h i t e R V e d i o l e t (b) (mmmmmm) W h i t e G R r e e n e d . Presbyopia is an eye defect in which.Q116. a person can see. A human eye can see both nearby and distant objects clearly. (d) None of above (b) Distant Q120. (iiiiii)Near pt of eye is 25cm. (kkkkkk)Nearer objects clearly objects clearly (c) Both distant and nearby objects Q119. (hhhhhh)The retina can change position. The dispersive power of a prism depends upon (ffffff)Material of prism (c) Size of prism (b) Angle of prism (d) None of the above Q117. Stars twinkle due to (llllll)Atmospheric refraction (c) Scattering of light prism. (a) Becomes two times (c) Remains the same always: (a) Less (c) Same of salt added Q124. The density of salty solution of water as compared to the density of pure water is . If the mass of solid body is doubled. What is the density of water in SI unit at 40C? (a) 1 kg / m3 kg / m3 Q122. its density. Mass of a body is defined as (nnnnnn)The force with which a body is attracted towards the centre of earth (oooooo)The quantity of matter contained in the body (pppppp)Force acting on a body divided by velocity produced in the body (qqqqqq)None of the above (b) More (d) Dependent upon amount (b) Becomes four times (d) Becomes half (b) 10 kg /m3 (c) 100 kg / m3 (d) 1000 Q123.W h i t e V i o l e t (c) Y e l l o w (d) W h i t e B l u e G r e e n Q121. Q131. (a) Heat is released (c) Temperature is decreased the boiling point of this water will be (a) 373 K (c) More than 1000C 100 C 0 (b) UA = UB (d) None of the above. If UA and UB symbols represent the upthrust exerted by the liquid on bodies A and B respectively. then (a) UA = UB (c) UA < UB data needed Q127.e. The SI unit of mass is (a) Kg wt (b) g wt (c) kg mg Q126. (uuuuuu)The rate of cooling gradually goes down as the liquid temperature falls. Q132. At the top of a mountain. Which one of the following systems is formed when alum is added to water with constant stirring with a glass rod? . more (b) Specific heat (c) Heat (d) (b) Heat is absorbed (d) Temperature is increased Q129. The boiling point of pure water in the plains is 100 0C.Q125. (b) Less than 1000C \ (d) Exactly the same. Two bodies having same mass are attached to the hooks of the two spring balances separately. (yyyyyy)None of the above factors. Tick the incorrect statement (rrrrrr)Rate of cooling = Rate of fall of temperature (ssssss)Rate of cooling = Rate of fall of temperature (tttttt)Rate of cooling of a body is defined as the amount of heat lost by the body per second. Both masses were fully immersed in beakers A and B having the same liquid. Q130. Calorie / g oC is the unit of (a) Latent heat Temperature Q128. When water is converted into ice. i. It is found that the level of liquid after fully immersing the body in beaker A is more than that of beaker B. The rate of cooling of a liquid depends on (vvvvvv)The difference of temperature of the liquid and that of the surrounding (wwwwww)Specific heat of the liquid (xxxxxx)Area of the liquid exposed to the surroundings. Tick the incorrect statement. Y and Z respectively for the size of the particles in the figures given below? (d) It is transparent and (b) Its particles are seen by X (a) X = solution (b) X = sol (c) X = suspension (d) X = suspension suspension? (a) Calcium sand Y Y = suspension Y = suspension Y = sol Y = solution Z Z = sol Z = solution Z = solution Z = sol Q135. This system represents which one of the following? (a) True solution (c) Colloid Tyndall effect? (a) Between 0. What is the correct designation of X. Which one is observed in case of a colloid of starch in water? (a) Its components are separated by filtration naked eye (c) It shows Tyndall effect unstable Q134. Which term is missing in the figure that describes the preparation of a (b) Egg albumin (c) Sugar (d) Fine Q136. A system of a solid in a liquid is stable.(a) Suspension Colloid (b) Colloidal solution (c) True solution (d) Q133. What is the range of particle size ins system which show Brownian motion and Q138. What is obtained on heating iron filings and sulphur powder in the mass ratio of 7 . its components are not separated by filtration and its shows Brownian motion.12 nm to 1 nm (c) Between 100 to 300 nm and 4? (b) Between 1 nm to 10 nm (d) Above 103 nm (b) Suspension (d) Each one of the three Q137. They reported the observations as shown in the table. Which student was serious and sincere to record each observation correctly? Student (a) (b) (c) (d) Colour of the gas Colourless Colourless Green Colourless Odour of the gas Bad smell Odourless Bad smell No smell Flammability of the gas Nonflammable Nonflammable Nonflammable Nonflammable Action on lead acetate paper Paper turns black No action No action Paper turns black Q143. This gas is (a) SO2 (b) H2 (c) A mixture of SO2 and SO3 (d) H2S Q142. ISI stands for (a) Indian School Institute (b) International products . A gas was liberated when each student added equal volumes of dilute hydrochloric acid.(a) A heterogeneous mixture of Fe + S (c) A homogeneous compound (FeS) (b) A mixture of FeS + Fe (d) A mixture of FeS + S Q139. (ccccccc)Iron (II) sulphide (FeS) is formed Q140. What is observed when dilute H2SO4 is added to a mixture of iron filings and sulphur powder? (zzzzzz)A mixture of H2 + H2S is formed (aaaaaaa)A colourless and odourless gas is liberated and a greenish solution appears. When a mixture of iron filings and sulphur powder is heated with dilute sulphuric acid a gas is liberated. (bbbbbbb)A gas with the dour of rotten eggs is liberated and a greenish solution appears. Which one is not observed when carbon disulphide is added to a mixture of iron filings and sulphur powder taken in a boiling tube? (ddddddd)Iron filings remain unaffected (eeeeeee)Sulphur powder dissolves and a yellow solution is formed (fffffff)Iron sulphide (FeS) is formed by the combination of iron of the mixture and sulphide of CS2. (ggggggg)Solid sulphur reappears when yellow solution is evaporated. Samples of iron sulphide were taken separated by a group of four students of class IX. Q141. Paul added a little rice extract to iodine solution in test tube B. In which form the carbohydrates are stored in animals? . The cheaper materials which are added to superior food items for more profit are called (a) Drugs Antibodies Q145.Organisation (c) Indian Standard Institute Institute Q144. Some iodine Solution splashed on his yellow coloured cotton shirt and also on the white table cloth. They should then observe (jjjjjjj)A change of colour to blue-black in test tube A but not in test tube B (kkkkkkk)A change of colour to blue-black in test tube B but not in test tube A (lllllll)A change of colour to blue-black in both test tubes A and B (mmmmmmm)No change of colour in any test tube. The stains on the table cloth was yellowish brown while that on his shirt was blue-black. The most plausible scientific reason for this is that the (hhhhhhh)Shirt was dyed with metanil yellow washing (iiiiiii)Table cloth was starched but not the shirt (d) Shirt had absorbed sweat Q148. Which of the following will give positive iodine test? (a) Sugars (c) Proteins (a) Cellulose Glucose Q147. A blue-black colour with I2 solution indicates the presence of (a) Fats Proteins Q150. Q149. Ritu added only two drops of iodine to a rice extract in test tube A. Vipin was rushing with a bottle of tincture iodine. Which of the following test is performed to check the presence of metanil yellow in the food extract (a) H2SO4 test (b) Na2CO3 test (c) HCl test (d) HNO3 (b) Glucose (c) Starch (d) (b) Shirt was starched after (b) Starch (b) Boiled egg’s white part (d) Potato Extract (c) Glycogen (d) (b) Adulterants (c) Antibiotics (d) (d) International Standard Q146. Q151. (vvvvvvv)Viruses make use of host machinery (wwwwwww)Viruses are on the border line of living and non-living. Gold foil was used in Rutherford’s scattering experiment because it. An element has an electronic configuration of 2. (xxxxxxx)Viruses have very few biochemical mechanisms of their own. (b) 7 (b) Anthrax (c) 17 (c) Tuberculosis (d) 8 (d) Q158. Q160. Choose the wrong statement. (aaaaaaaa)Cancers can be caused by genetic abnormalities (bbbbbbbb)Peptic ulcers are caused by eating acidic food. (qqqqqqq) 0 A (b) 1 A +1 (c) 1 A0 (d) 1 A −1 Q155. A proton is represented by 1 Q153. Making anti-viral drugs is more difficult than making anti bacterial drugs because. The size of nucleus is −15 −16 (b) 10 m −17 (c) 10 m (b) Deuterium (c) Tritium (d) (sssssss) 10 10−18 m m (d) Q157. (zzzzzzz)High blood pressure is caused by excessive weight and lack of exercise. then the atomic number of the atom is (nnnnnnn)28 (b) 16 (c) 18 (b) Has high density (d) Is highly ductile (b) Goldstein (c) Chadwick (d) (d) 20 Q152. Which one of the following disease is not caused by bacteria? . The other name of 11H is (rrrrrrr)Protium Proton Q156. Its valency is (ttttttt)1 (uuuuuuu)Typhoid Malaria Q159. (ooooooo)Has high refractive index (c) Is highly malleable (ppppppp)Crookes Thomson Q154. (yyyyyyy)Viruses have a protein coat. If a neutral atom has three cells completely filled up. 8 and 7. Who carried out the discharge tube experiment for the first time. then the wavelength of wave is given by (b) 15 Hz (c) 90 Hz (d) 900 (c) Malaria (d) All (b) AIDS (d) None (c) Hepatitis (d) Q163.(cccccccc)Acne is caused by staphylococci. The disease which begins abruptly and last only for a short duration is known as. A fan is marked 900 r. What is the frequency of movement of its blades? (kkkkkkkk)10 Hz Hz Q166. Droplet method of transmission of disease is found in (b) Chronic (llllllll)L (b) 2 L L (c) 2 (c) Anvil (d) 4 L (d) Q167. If the distance between a crest and its consecutive trough is L. Q161.p.m. (hhhhhhhh)Acute disease disease (c) Congenital disease (iiiiiiii)Common cold Syphilis Q164. (revolutions per minute). Vectors can be defined as (dddddddd)Micro-organisms which cause marry diseases (eeeeeeee)Animals carrying the infecting agents from sick person to a healthy person (ffffffff)Infected person. Q169. Sound and light waves both (nnnnnnnn)Have similar wavelength reflection (c) Travel as longitudinal waves sound wave travels through it is (d) Travel through vacuum. (mmmmmmmm)Femur (b) Hammer Stirrup Q168. (gggggggg)Diseased plants Q162. Which of the following is not the bone found in the middle ear. A protozoan disease is (jjjjjjjj)Sleeping sickness (b) Kala-azar the above Q165. The part of the medium in which the pressure and density are maximum when a (b) Obeys the laws of . the position of ear of observer will be. (b) II (c) III (d) Both I . sound is directed along. If the reflecting surface and source of sound both are in plane of table. 2 students used different reflecting surfaces. we prefer a long slinky/string. (vvvvvvvv)Axis of the tube axis of tube (wwwwwwww)Both (a) and (b) Neither (a) nor (b) Q174. Q173. In the experiment of verification of laws of sound. plane metal sheet (c) Rough cardboard sheet string. (qqqqqqqq)Thermocol sheet Polished. Which of the following sound waves are the lewdest? (d) (b) Normal to (d) Cushioned chair Q172. In an experiment for determining the velocity of propagation of pulse in a slinky / (b) (c) Microphone (d) I I I I I I (xxxxxxxx)I and II Q175. While studying the reflection of sound.(oooooooo)Crest Compression (b) Trough (c) Rarefaction (d) Q170. (rrrrrrrr)Because pulse can’t be formed in a short slinky / string (ssssssss)Because short slinky / string is cheap. The best result would be obtained by the student using the reflecting surface. Which of the following is not based on reflection of sound? (pppppppp)Megaphone (b) Sound board Stethoscope Q171. (tttttttt)So that pulse may move easily through it. (uuuuuuuu)So that time taken by pulse to move from one end of the slinky / string to other is more. its velocity is (b) displacement distance (d) Neither ‘a’ nor ‘b’ (b) Only . soft and flexible spring is called (fffffffff)Pulse (b) Rope (c) Wire (d) Slinky (b) 1.5 sec.distance graph graph (c) Density . (yyyyyyyy)Direct sound from clock (zzzzzzzz)Sound reflected from any reflecting surface (aaaaaaaaa)Sound coming through tube after reflection (bbbbbbbbb)Sum total of direct sound and reflected sound Q177. (ccccccccc)Only a metre scale a stop watch (c) Both ‘a’ and ‘b’ Q178.9 m/s (d) Any of these (c) 4. In the experiment to find velocity of pulse in a slinky. A sound wave covers a distance of 9. A long. 0 (d) Perpendicularly above the (d) On plane at an angle of Q176.(a) On same plane source (c) On plane at an angle of 450 to table 60 to table.displacement graph (eeeeeeeee)19 m/s m/s Q180. sound received in ears should be. A longitudinal wave is represented by (ddddddddd)Density . In the experiment of verification of laws reflection of sound. we need.5m in 0.7 m/s (d) 47.5 Q179.