(According to the New Syllabus & Trends)

UPKAR PRAKASHAN, AGRA–2

ByDr. Lal & Sharma

2017

Previous Years’ Papers–Fully SolvedPrevious Years’ Papers–Fully SolvedPrevious Years’ Papers–Fully SolvedPrevious Years’ Papers–Fully SolvedPrevious Years’ Papers–Fully Solved

Other Useful BooksUpkar’s MCQ in Physics 150/-Upkar’s MCQ in Chemistry 150/-Upkar’s Quicker Numerical Physics 315/-

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CONTENTS

● Previous Years’ Papers—Fully Solved

PHYSICS1. Measurements 3–52. Motion 6–93. Force 10–144. Gravitation 15–175. Work and Energy 18–216. Heat 22–32

7. Wave Motion and Sound 33–37

8. Reflection of Light 38–44

9. Refraction of Light 45–55

10. Optical Instruments 56–61

11. Current Electricity and Ohm’s Law 62–67

12. Heating Effect of Current 68–72

13. Chemical Effect of Electric Current 73–84

14. Magnetic Effect of Current 85–97

15. Magnetism 98–104

CHEMISTRY1. Matter—Nature and Behaviour 3–112. Chemical Bonds 12–18

3. Physical and Chemical Changes andDifferent Type of ChemicalReactions 19–27

4. Electrolysis 28–34

5. Electro-chemical Cells 35–406. Classification of Elements 41–487. The Necessity of a Balanced Diet 49–558. Common Human Diseases 56–609. Bio-mass and Bio-energy 61–65

10. Combustion and Fuel 66–7311. Ecology—Mineral Cycle and

Ecological Equilibrium 74–8712. Water 88–9313. Atmosphere and Air 94–10314. Metal and Non-metals 104–11215. Carbon and Its Compounds 113–120

MATHEMATICS

Unit-I

Number System 3–9Unit-II

Algebra 10–401. Polynomials 102. Pair of Linear Equations in Two

Variables 163. Quadratic Equations 244. Arithmetic Progressions 33

Unit-IIITrigonometry 41–60

1. Trigonometrical Identities andEquations 41

2. Heights and Distances 51

Unit-IVCo-ordinate Geometry 61–65

Unit-VGeometry 66–95

1. Introduction to Euclid’s Geometry 662. Lines and Angles 663. Similar Triangles 724. Quadrilateral 825. Circle 88

Unit-VIMensuration 96–123

1. Area of Triangle 962. Area of Square and Rectangle 993. Area of Parallelogram and Rhombus 1034. Area of Trapezium 1055. Circles and Its Sector 1086. Cube and Cuboid 1137. Cylinder, Cone and Sphere 117

Unit-VII1. Statistics 124–1362. Probability 137–1413. Computers 142–147

SYLLABUS

Paper–ISection A–Physics

(50 Questions)

Motion—Motion, displacement, uniform andnon-uniform motion, speed and velocity accelera-tion, equations of motion.

Force—Force, inertia of a body, balancedforce, unbalanced force and acceleration, mass ofbody, relation between acceleration and force,couple of action and reaction.

Gravitation—Law of gravitation, accelera-tion due to gravity, electrostatic force, magneticforce.

Work—Work done by force, relation betweenwork and energy, kinetic energy, potential energy,conservation law, power.

Wave Motion—Nature of wave, transmissionof wave in a medium, types of waves, longitudinaland transverse waves, graphical representation ofsimple harmonic motion, amplitude, speed ofwave, relation between wavelength andfrequency, reflection and refraction of waves, lawsof reflection and refraction of waves, transfer ofenergy during transmission of waves, light andsound waves as carriers of energy.

Human Eye—Absorption of energy carriedin light waves by human eye, construction ofhuman eye and its working, focal length of eyelens, formation of image on retina, visual angle,myopia and hypermetropia, removal of defects ofvision, absorption of colours, constitution of whitelight, wavelength of different colours, colour ofbodies, sensitive cells in eye, rod and cone, blindspot, colour blindness.

Telescope—Construction and working.

Microscope—Construction and working.

Heat—Form of energy, mechanical work andheat, heat and temperature, thermometry, effectsof heat, thermal expansion and change of state.

Electricity—A source of energy, conductorand resistance, current, measurement of potentialdifference and resistance and relation betweenthem, heating effect of electric current, thermo-electricity, quantitative relationship betweenresistance and time of flow of current, appliancesbased on the heating effect of current,measurement of electrical energy, its unit andpower.

Magnetic Effects of Current— Current carry-ing conductor, magnetic field of coil and solenoid,applications of electric motor, electromagneticinduction, electric generator, direct current andalternating current (Elementary knowledge).

Domestic Circuits—Wiring, fuse, contin-gency and a preliminary knowledge of safetymeasures.

EnergySun as the source of energy, absorption of

solar energy by earth, solar heater, solar cell,windmill, generation of hydroelectricity, electricityfrom sea waves.

Nuclear energy, nuclear fission, electricalenergy from nuclear fission, atomic power plant,recycling of waste matter, organic degradables.Proper development of nuclear and radioactivewastes, radiation hazard, harmful effects ofradioactive wastes, technique of proper storage ofradioactive waste.

Types of internal combustion engine, workingprinciple of internal combustion engine, causes ofenergy crisis and ways to its depletion, preventionof wastage of energy, utilisation of non-conventional sources of energy.

UniverseEarth—Physical and organic elements,

Changes occurred thus far since the origin of

( v )

atmosphere. Role of solar energy in the origin andsustenance of life.

Solar System—Planets and satellites, compo-sition of solar system, age of the planets includingearth.

Universe—Solar system, galaxy, spiral andelliptical galaxies, expanding universe, origin ofthe universe–Big–Bang theory.

Space Research—History of space research,applications of space science, artificial satellitetransmission, weather controlling monitoring theother planets and the outer space.

Section B–Chemistry(50 Questions)

Nature of Matter and Its BehaviourNature and Behaviour of Different

Matters—elements, compounds and theirmixtures, composition of matter, molecule andatom, structure of atom—electron, proton,neutron, nuclear organization-atomic numberand mass number, electron distribution indifferent energy levels of matter, valence electronsand valency, atomic mass and molecular mass,mole concept, percentage constitution ofcompounds.

Chemical Bonds—Formation of ionic andcovalent bonds, main properties of ionic andcovalent compounds.

Physical and Chemical Changes—Differen-ces between physical and chemical changes,substitution reactions in additive reactions,reduction reactions, slow and fast reactions,representation of catalytic chemical reactions,chemical equations, exothermic and endothermicchemical reactions.

Electro-chemical Cells—Structure of simplevoltaic cell, procedure of electro-chemical cell,lead accumulator, Battery and dry cell.

Electrolysis—Movements of ions in electro-lysis, relation of the mass of metal liberated withcurrent and time in electrolysis, electroplating.

Classification of Elements—Similarities anddissimilarities in the properties of elements,periodic law, periods and groups, orderliness inthe properties of elements of periodic groups,Estimation of the properties of elements ofperiodic table.

Bio-energy—Bio-mass, Bio-mass as fuel,Bio-gas.

Fossil Fuels—Sources of fossil fuel, coal,natural gas, petroleum.

Types of Fuel—Energy from fuels, character-istics of solid, liquid and gaseous fuels,restrictions on combustion, heat produced incombustion, food combustion in living organism.

Necessity of Balanced Diet—Nature of workand diet, necessity of nutrients and their role,carbohydrates, proteins, fat, vitamin and mineralsalts etc., sources of carbohydrates, fat, vitaminsand mineral salts, deficient nutrition diseasescaused by deficient nutrition (deficiency disease)and their symptoms, malnutrition of proteinenergy, mineral salt malnutrition, symptoms ofdiseases, factors of deficiency, prevention, adverseeffects of over nutrition, plumpness and othercomplexities, reverse morbidity related to heartvessels, mottling of teeth and fluorosis,hypervitamineosis.

Reverse disorders caused by alcohol,smoking, medicines and the drug addiction.

Mineral Cycle—Carbon cycle, carbon andthe role of its compounds, Nitrogen fixation andNitrogen cycle, Oxygen cycle, Oxidation process,Water cycle, role of energy in different cycles.

Ecological Equilibrium—Role of man indisturbing the ecological equilibrium, steps tosustain ecological equilibrium, moderate water asa solvent, saturated and unsaturated sea water as ahabitat for living beings, salt, uses of water.

Air—Role of atmosphere in protectionfrom radiation, composition of atmosphere, waterand other suspended particulate matters inatmosphere, carbon dioxide and its adverse effecton living organism, role of plants, fossils, fuel andemission of carbon dioxide by automobiles,conservation of metals, damage caused tohistorical monuments by acidic gases, effect ofasbestos and other metallic particles on livingorganisms, carbon monoxide and its bad impact,sunlight, smog, air pollution and its impact onhumans.

Dependability of Man on NaturalResources—Mineral metals and non-metalsobtained from earth, uses of non-metals, carbonand its compounds, properties of carbon andhydrocarbons, petroleum products, extraction of

( vi )

metals, properties of metals and some alloys,metallurgy, domestic and industrial uses of non-metals and certain alloys.

Paper–IIMathematics

(50 Questions)

Algebra(1) Finite and infinite sets, subsets, empty

sets, universal sets, complement of a set and theirapplications.

(2) Sets of integers. Revision of whole num-bers, integers and rational numbers, introductionto irrational numbers as non-terminating and non-recurring decimals, rationalisation of surds, realnumbers and the description of the properties ofthe sets of real numbers.

(3) Theorems and applications, factorisationof polynomials with exponents not exceedingfour, determination of highest common factorsand least common multiples by multiplication anddivision methods.

(4) Linear equations of two variable quantities,and their graphs, system of double linearequations for two variables, consistency and non-consistency of equations.

Algebraic method of solution of the system ofequations, applications of system of equations indifferent fields.

MensurationRectangle, square, triangle, rhombus, area of

a trapezium and circle, sector or cube, cuboid,cone, cylinder, surface area and volume ofcylinder and sphere.

Trigonometry(1) Trigonometrical identities.A simple identity based on the above formula.

Trigonometrical ratios of complementary angles.(2) Problems on height and distance.

Geometry1. Congruent Triangles :

(1) A straight line drawn parallel to one sideof a triangle divides the other two sides in thesame ratio.

(2) A straight line dividing the two sides of atriangle in equal ratios is parallel to the third side.

(3) If the consistent angles of two trianglesare equal, then their consistent sides are in equalproportions.

(4) If the sides of two triangles are in equalproportions, then the triangles are equiangled.

(5) If the triangles are mutually equiangled,they will be congruent.

(6) If the sides of two triangles are in directproportion, then the triangles will be congruent.

(7) If an angle of one of the two triangles isequal to the consistent angle of the other triangleand the sides subtending these angles are in directproportion, then the triangles will be incongruence.

(8) If a perpendicular is drawn on hypotenusefrom the vertex of a triangle, then the trianglesformed on both the sides of the perpendicular willbe in mutual congruence and will also be incongruence with the given triangle.

(9) The ratio of the areas of congruenttriangles is equal to the ratio of the squaresdescribed on their corresponding sides.

(10) The square described on the hypotenuseof a right angled triangle is equal to the sum of thesquares described on other two sides.

(11) If the sum of squares described on twosides of a triangle is equal to the square describedon third side, then the angle opposite to third sideis a right angle.

2. Circle :

(1) If the radii of two circles are equal, thecircles will be in congruence with each other.

(2) If two circles have equal areas, theircorresponding chords are also equal. Its converse.

(3) If a perpendicular is drawn on the chordfrom the centre of a circle, it bisects the chord;conversely the line joining the mid-point of thechord to the centre of the circle is alwaysperpendicular to the chord.

(4) One and only one circle can be drawnthrough such three points as do not fall on thesame straight line.

(5) Equal chords in a circle are alwaysequidistant from the centre; conversely, if twochords in a circle are at equal distances from thecentre, they will be equal to each other also.

( vii )

(6) The angle subtended at centre by an arcof a circle is double of the angle subtended by thesame arc at a point situated on the circumferenceof that circle.

(7) The angle subtended at the semi-circle is aright angle and its converse.

(8) Angles described in the same segment of acircle are always equal.

(9) If a line segment subtends equal angles attwo points situated on the same side of it, then allthe four points are cyclic.

(10) Equal chords of a circle subtend equalangles at the centre.

Converse—If two chords subtend equalangles at the centre then they are equal.

(11) If in a circle two arcs subtend equalangles at the centre, then the arcs will be mutuallyequal and its converse.

(12) The sum of the opposite angles of acyclic quadrilateral is 180°, conversely, if theopposite angles of a quadrilateral are comple-mentary, then the quadrilateral will be cyclic.

(13) The tangent drawn at a point of a circleis perpendicular to the radius drawn from thetangential point.

(14) Two tangents drawn on a circle from anexternal point are equal.

(15) If the chords of a circle intersect eachother internally or externally, the rectangle formed

by the segments of one chord will be equal in areato the rectangle formed by the segments of theother chord.

(16) PAB is the line of intersection of a circlethat cuts the circle at points A and B. If PT bethe tangent to the circle, then prove that PA.PB =PT2.

(17) If a straight line touches a circle and achord is drawn from the point of contact, then theangles included within the chord and the tangentare respectively equal to the angles includedwithin the corresponding alternate segments of thecircle and its converse.

(18) If two circles touch each other, then thepoint of contact is situated on the straight linejoining the centres of the circles.

StatisticsA descriptive interpretation of the mean for a

grouped data, the median for ungrouped data,death schedule, cost of living index number, priceindex number etc.

ComputingFlow chart connected with the loop, Mathe-

matical calculations such as (algorithm), profitand loss, ratio, proportion, simple interest andcompound interest, least common multiple andhighest common factor.

Madhya PradeshPre-Polytechnic Test, 2015

Solved Paper

2015Section–APhysics

1. Which is incorrect statement about action andreaction referred to Newton’s third law ofmotion ?

(A) They are equal

(B) They are opposite

(C) They act on two different objects

(D) They act on the same object

2. A man is standing in the middle of a pondwhose water has condensed into a smooth,flat ice. The person can get himself to theshore by using Newton’s ?

(A) First law (B) Second law

(C) Third law (D) All the laws

3. The distance between a crest and the nexttrough in a periodic wave is—

(A) λ (B)λ2

(C)λ4

(D) 2λ

4. Two bodies of masses 10 kg and 1 kg aredropped simultaneously from a height of 100meter taking the effect of air negligible. Thento the ground—

(A) Both will take same time

(B) The heavier mass will reach earlier

(C) The lighter mass will reach earlier

(D) Nothing could be said

5. In cold countries, water pipes sometimesburst, because—

(A) pipe contracts

(B) water expands on freezing

(C) when water freezes, pressure increases

(D) when water freezes, it takes heat frompipes

6. A person weight was measured at differentplaces on earth surfaces. Its weight will be—(A) Maximum on equator(B) Maximum on Tropics of cancer and

capricorn(C) Maximum at poles(D) Will be same everywhere

7. A machine do 1·0 Joule of work in 1·0 second,then its power will be—(A) 1·0 Newton (B) 10 Newton(C) 1·0 watt (D) 10 watt

8. When a spring is compressed its—(A) Kinetic energy increases(B) Potential energy increases(C) Kinetic energy decreases(D) Potential energy decreases

9. If the kinetic energy of a body increases andbecome twice then its momentum will—(A) reduce to half (B) increase 8 times

(C) become double (D) increase √⎯ 2 times

10. A coolie picked up a box from road and put iton the roof of a bus in one minute. Anothercoolie put the same box on the roof in 2minutes. Then—(A) Work of first coolie is more(B) Work of II coolie is more(C) Work of both the coolie is same(D) Work of both the coolie is zero

11. Sound wave is what kind of a wave ?(A) Transverse wave(B) Longitudinal wave(C) Electromagnetic wave(D) None of these

12. Water falls from a height of 500 m. What isthe rise in temperature of water if the wholeenergy remains in the water ? (sp. heat ofwater = 4200 J/kg°C)(A) 1·16°C (B) 0·490°C(C) 0·24°C (D) 1·19°C

4 | Pre-Polytechnic (M.P.) 2015

13. A wave has a wavelength of 1·0 cm and thetime period of its particles is 0·1 second. Thespeed of the wave is—(A) 0·1 cm/sec (B) 1·0 cm/sec(C) 10 cm/sec (D) 100 cm/sec

14. The frequency of AC mains in India is—(A) 100 Hertz (B) 50 Hertz

(C)1

100 Hertz (D)

150

Hertz

15. Sound moves fastest in—(A) air (B) water(C) vacuum (D) steel

16. The magnetic field produced due to currentcarrying circular wire at its centre is—(A) in the plane of the wire(B) perpendicular to the plane of the wire(C) at 45° to the plane of the wire(D) at 60° to the plane of the wire

17. In the eye defect of nearsightedness the imageof a far placed object forms—(A) behind the retina(B) in front of the retina(C) on the retina(D) no image is formed

18. To correct the defect of nearsightedness aperson should use spectacles made of—(A) Convex lens (B) Concave lens(C) Plane lens (D) Cylindrical lens

19. To obtain a magnified crect image of a faraway object what should be used along with aconvex lens—(A) a Convex lens(B) a Concave lens(C) a Convex mirror(D) a Concave mirror

20. We are having two convex lenses A and B.Focal length of A is 50 cm and focal length ofB is 5 cm. We have to make a telescope usingthem, then—(A) We should use A as objective, B as

eyepiece(B) We should use B as objective, A as

eyepiece(C) Any of them can be used as objective or

eyepiece

(D) It is not possible to make a telescopewith these lenses

21. The images formed by objective and eyepieceof a Astronomical telescope are Io and Ie

respectively, then—(A) Io, Ie both are real(B) Io is virtual, Ie is real(C) Io, Ie both are virtual(D) Io is real, Ie is virtual

22. The Magnifying power of a Astronomicaltelescope is 10. The focal length of eyepieceis 20 cm. Then to obtain the image at infinity,the focal length of objective should be—(A) 2 cm (B) 200 cm

(C)12 cm (D)

1200

cm

23. The temperature of an object in Fahrenheitscale is 68°F. Its temperature on celcius scalewill be—(A) 64·8°C (B) 20°C(C) –20°C (D) 16°C

24. Which of the following is used as control rodsin a nuclear reactor—(A) Graphite (B) Heavy water(C) Cadmium (D) Uranium-235

25. The temperature of a body was found to be xkon Kelvin scale. The temperature on somebody was found to be x°F on fahrenheit scale.Then value of x will be—(A) 301·25 (B) 574·25(C) 313 (D) 40

26. How much heat will be produced by doing4·18 × 103 Joule of work ?(A) 1·0 calorie (B) 100 calorie(C) 1·0 kilo calorie (D) 10 kilo calorie

27. At higher mountains it is not possible toeasily cook the pulses (Dals). The reason is atmountains—(A) Atmosphere is cool(B) Fire looses its heat(C) Boiling point of water decreases(D) Boiling point of water increases

28. 1·0 coulomb/second is equal to—(A) 1·0 volt (B) 1·0 watt(C) 1·0 Ampere (D) 1·0 ohm

Pre-Polytechnic (M.P.) 2015 | 5

29. Which of the following is not suitable formaking a solar cell—(A) selenium (B) gallium(C) platinum (D) silicon

30.1 Volt

1 Ampere will be equal to—

(A) 1 watt (B) 1 ohm(C) 1 joule (D) 1 coulomb

31. When the temperature of a metal is increased,its resistance—(A) increases(B) decreases(C) remains constant(D) first decreases then increases

32. The sun energy is useful—(A) to generate electricity(B) process of photosynthesis(C) flow of wind(D) All the above

33. A electric heater of 1 kilo-watt is used for 1minute. How much electrical energy will beconsumed ?(A) 600 Joule (B) 1000 Joule(C) 6 × 104 Joule (D) 60 Joule

34. A electric motor is based on which kind ofeffect of electricity ?(A) Magnetic effect of electricity(B) Heating effect of electricity(C) Chemical effect of electricity(D) Charge effect of electricity

35. The on/off switch of an electrical equipmentshall be connected to which wire ?(A) live wire(B) neutral wire(C) earthing wire(D) may be connected to any wire

36. Short-circuit in electric wiring means—(A) Connecting of live wire with earthing

wire(B) Connecting of live wire with neutral wire(C) Connection in neutral and earthing(D) Increase in the resistance of wire

37. Flowing water can rotate a turbine. Whichenergy of water is used by turbine ?

(A) Kinetic energy (B) Potential energy(C) Wind energy (D) Water energy

38. What is the original source of wind energy ?(A) Ocean energy(B) Solar energy(C) Geothermal energy(D) Chemical energy

39. The origin of solar energy is—(A) Nuclear fission(B) Nuclear fusion(C) Collision of heavenly bodies(D) None of the above

40. The control rods in a nuclear reactor are madeof—(A) Lead and Carbon(B) Steel and Iron(C) Calcium and Magnesium(D) Cadmium and Boron

41. Hydrogen bomb is based on—(A) Fuel efficiency of hydrogen gas(B) Conversion of water into hydrogen(C) Fission of hydrogen nuclei(D) Fusion of hydrogen nuclei

42. Which havenly body was earlier consideredas a planet, but not now ?(A) Alpha centauri (B) Pluto(C) Mercury (D) Asteroids

43. After sun which is the nearest star of earth ?(A) Pole star (B) Sirius(C) Alpha centauri (D) Mars

44. Big Bang theory is concerned with—

(A) Origin of planets

(B) Origin of stars

(C) Origin of solar system(D) Origin of universe

45. A person went to market from his home andreturned to home after four hours. His—(A) Average velocity is zero(B) Average speed will be zero(C) Both average velocity and average speed

will be zero(D) Neither average velocity nor average

speed will be zero

6 | Pre-Polytechnic (M.P.) 2015

46. A ball is thrown vertically upwards with avelocity of 20 m/sec from the top of a cliff.Ball hits the ground 5 seconds after therelease. What is the height of the cliff ? [takeg = 10 m/s2](A) 225 m (B) 25 m(C) 50 m (D) 125 m

47. A particle moves from point A to point B on asemicircular path of radius 1·0 meter in 1·0second. Its average velocity will be—

1·0 m

A

B

(A) 3·14 m/sec (B) 2·0 m/s(C) 1·0 m/s (D) zero

48. The given velocity – time graph shows—

Velocity

Time ↑

↑

(A) Constant displacement(B) Constant velocity(C) Constant acceleration(D) Constant momentum

49. A ball is hanging to the cieling of a car withthe help of a thread. If the car is moving withacceleration, what will be the effect on posi-tion of the ball ?(A) ball remains hanging vertically(B) ball will shift in forward direction(C) ball will start oscillating(D) ball will shift in backward direction

50. A constant force is applied upon a body. Thebody will move with—(A) Constant speed(B) Constant velocity(C) Constant acceleration(D) Constant momentum

Section–B

Chemistry51. The water-cycle in nature involves the pro-

cesses except the following—(A) Evaporation (B) Respiration(C) Transpiration (D) Decomposition

52. The role of plants in nitrogen cycle is—(A) to convert nitrogen into nitrates and

nitrites(B) to convert nitrogen into nitric acid(C) to convert nitrates and nitrites into amino

acids(D) to convert proteins into nitrates and

nitrites

53. Which of the following in included in greenhouse gases—

(A) Oxygen (B) Nitrogen

(C) Hydrogen (D) Carbondioxide

54. Select the wrong statement regarding‘Biogas’ ?

(A) It burns without smoke(B) Its heating capacity is low

(C) It leaves no residue like ash

(D) It contains upto 75% methane

55. Respiration is an—

(A) Endothermic process

(B) Exothermic process

(C) Isothermic process

(D) Sometimes endothermic and sometimesexothermic

56. In diamond, eath carbon atom is bonded tofollowing number of other carbon atoms—(A) Six (B) Four(C) Three (D) Two

57. Which of the following is not a correctexample of Dobereiner’s triad ?

(A) Li, Na, K (B) Ca, Sr, Ba

(C) Cl, Br, I (D) C, N, O

58. Correct sequence of tendency to lose elec-trons is—

(A) Li < Be < B (B) Li < Na < K(C) Li > Na > K (D) Be > Mg > Ca

Pre-Polytechnic (M.P.) 2015 | 7

59. Which of the following is not biodegradableitem ?(A) Wood (B) Leather(C) Grass (D) Plastic

60. From the following which comes in categoryof primary consumer ?(A) Autotrophs(B) Herbivores(C) Small carnivores(D) Large carnivores

61. Which of the following represents the alde-hyde functional group ?

(A) —OH (B)—C—

||O

(C)O||

—C—H(D)

O||

—C—OH

62. Select the correct example of structural iso-mers—(A) Ethane and propane(B) Cyclohexane and benzene(C) Cyclohexane and hexane(D) Butane and isobutane

63. Number of covalent bonds in Ethane molecule(C2H6) are—

(A) 2 (B) 4(C) 6 (D) 7

64. Which of the following metal oxides reactswith both acids and bases ?(A) MgO (B) CaO(C) Al2O3 (D) Na2O

65. Which of the following metals do not reactwith water, but reacts with steam ?(A) Na (B) K(C) Mg (D) Al

66. Which of the following metals founds inearth’s crust in native state ?

(A) Al (B) Mg

(C) Ca (D) Au

67. Select the correct reactivity sequence of thefollowing metals—(A) Mg < Fe < Cu < Ag(B) Ag < Cu < Fe < Mg

(C) Mg < Cu < Fe < Ag

(D) Mg < Ag < Fe < Cu

68. Following chemical reaction represents—

ZnCO3(s) Heat⎯⎯→ ZnO(s) + CO2(g)

(A) Roasting (B) Calcination

(C) Oxidation (D) Reduction

69. Cinnabar is an ore of following metal—

(A) Cu (B) Zn

(C) Fe (D) Hg

70. Following formula represents the magneticoxide of iron—

(A) FeO (B) Fe2O3

(C) Fe3O4 (D) Fe4O3

71. Brass is an alloy of—

(A) Cu and Sn (B) Cu and Zn

(C) Pb and Sn (D) Cu and Pb

72. In Galvanisation a thin layer of followingmetal is coated on iron—

(A) Hg (B) Zn

(C) Al (D) Ag

73. A green substance appears on the surface ofcopper when it is exposed to air, the greensubstance is—

(A) Cu(OH)2 (B) Cu(SO4)

(C) CuCO3 (D) CuO

74. The correct sequence of steps in extraction ofmetal from ore—

(A) Concentration → Roasting → Reduction→ Refining

(B) Concentration → Reduction → Roasting→ Refining

(C) Refining → Concentration → Roasting→ Reduction

(D) Reduction → Concentration → Roasting→ Refining

75. The hardest substance among the following—(A) Graphite (B) Fullerene(C) Diamond (D) Glass

76. Select the molecule with triple bond—(A) H2 (B) O2

(C) Cl2 (D) N2

Madhya Pradesh Pre-Polytechnic Tests

Publisher : Upkar Prakashan ISBN : 9788174824400 Author : Dr Lal And Sharma

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