KELVIN AIIMS Sample Question Paper 2018
Name of the Organisation : KELVIN
Name of the Exam : KELVIN AIIMS Question Paper
Document Type : Sample Paper
Category : AIIMS
Year : 2018
Website : kelvin [dot] ac [dot] in
KELVIN AIIMS Question Paper
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Maximum Marks: 800 (+4, –1)
Test Time: 3 ½ Hrs.
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Sample Questions
1. An object initially at rest explodes, disintegrating into 3 parts of equal mass. Parts 1 and 2 have the same initial speed „v?, the velocity vectors being perpendicular to each other. Part 3 will have an initial speed of
2. The x-t graph of a particle undergoing simple harmonic motion is shown in figure.Acceleration of particle at t = 4/3s is 10 – 1 t ( s e c ) x ( cm )4 8 1 2
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3. Two particles are executing SHM in a straight line with same amplitude A and time period T.At time t = 0, one particle is at displacement x1 = +A and the other at x2 = ?A/2 and they are pproaching towards each other. After what time they cross each other?
4. A particle is placed at rest inside a hollowhemisphere of radius R. The coefficient of friction between the particle and the hemisphereis . The maximum height up to which the article can remain stationary is
5. A simple pendulum is oscillating with an angular amplitude 90°. If the direction of resultant acceleration of the bob is horizontal at a point where angle made by the string with vertical is
6. Four identical particles each of mass “m” are arranged at the corners of a square of sidelength “L”. If one of the masses is doubled, the shift in the centre of mass of the system. w.r.t. diagonally opposite mass
7. A satellite moving in a circular path of radius „r? around earth have a time period T. If its radius slightly increase by ?r, the change in its time period is
8. Light of wavelength 6000 Å is incident on a single slit. The first minimum of the diffraction pattern is obtained at 4mm from the centre. The screen is at a distance of 2m from the slit. The slit width will be
(a) 0.3 mm
(b) 0.2 mm
(c) 0.15 mm
(d) 0.1 mm
9. A semiconductor X is made by doing a germanium crystal with arsenic (Z = 33). A second semiconductor Y is made it doping germanium with indium (Z = 49). The two are joined end to end and connected to a battery as shown. Which is the following statements is correct
(a) X is P-type, Y is N-type and the junction is forward biased
(b) X is N-type, Y is P-type and the junction is forward biased
(c) X is P-type, Y is N-type and the junction is reverse biased
(d) X is N-type, Y is P-type and the junction is reverse biased
10. A uniform cylindrical rod of mass m and length L is rotating with an angular velocity ?. The axis of rotation is perpendicular to its axis of symmetry and passes through one of its edge. If the room temperature increases by „t? and the coefficient of linear expansion is ?, the change in its angular velocity is
11. Some physical constants are given in List – I and their dimensional formulae are given in List-2. Match the following
List – I List – II
(A) Planck?s constant (e) [ML-1T-2]
(B) Gravitational constant (f) [ML-1T-1]
(C) Bulk modulus (g) [ML2T-1]
(D) Coefficient of Viscosity (h) [M-1L3T-2]
A B C D
(a) g h e f
(b) h e g f
(c) e f h g
(d) f e g h
Assertion & Reasoning Questions
Options:
(a) A and R are correct and R is correct explanation of A
(b) A and R are correct and R is not correct explanation of A
(c) A is true and R is false
(d) A is false and R is true
41. A: A piece of ice floats in water. The level of water remains unchanged when the ice melts completely.
R:According to Archimedes? principle, the loss in weight of the body in the liquid is equal to the weight of the liquid displaced by the immersed part of the body.
42. A: The phase difference between displacement and velocity in SHM is 90°.
R: The displacement is represented by y = A sin ?t and V = A? cos ?t.
43. A: According to the principle of conservation of energy total heat can be converted into mechanical work
R: Due to various losses, it is impossible to convert total heat into mechanical work
44. A: Woolen clothes keep the body warm in winter
R: Air is a bad conductor of heat
45. A: If three capacitors of capacitance C1 < C2 < C3 are connected in parallel then their equivalent capacitance Cp > C3
R: 46. A: The drift velocity of electrons in a metallic wire will decrease, if the temperature of the wire is increased.
R: On increasing temperature, conductivity of metallic wire decreases.
47. A: Microwave communication is preferred over optical communication.
R: Microwaves provide large number of channels and band width compared to optical signals.
48. A: In the following circuit emf is 2V and internal resistance of the cell is 1? and R = 1?, then reading of the voltmeter is 1V.
R: V = E ? ir where E = 2V, and ?
49. A: Cyclotron is a device which is used to accelerate the positive ion.
R: Cyclotron frequency depends upon the velocity.
50. A: At a point in space, the electric field points towards north. In the region, surrounding this point the rate of change of potential will be zero along the east and west.
R: Electric field due to a charge is the space around the charge.
51. A: The magnetic field produced by a current carrying solenoid is independent of its length and cross-sectional area.
R: The magnetic field inside the solenoid is uniform.
52. A: By roughening the surface of a glass sheet its transparency can be reduced.
R: Glass sheet with rough surface absorbs more light.
54. A: On a curved path average speed of a particle can never be equal to average velocity.
R: Average speed is total distance travelled divided by total time. Whereas average velocity is, final velocity plus initial velocity divided by two.
55. A: When the velocity of projection of a body is made n time, its time of flight becomes n times.
R: Range of projectile does not depend on the initial velocity of a body.
56. A: If net force on a rigid body is zero, it is either at rest or moving with a constant linear velocity.
R: Constant velocity means linear acceleration is zero
57. A: No work is done by the centripetal force acting on a body moving along the circumference of a circle
R: At any instant, the motion of the body is along the tangent to the circle where as the centripetal force is along the radius vector towards the centre of the circle.
58. A: Escape velocity is independent of the angle of projection.
R: Escape velocity from the surface of earth is v where R is radius of the earth.
59. A: The resolving power of a telescope is more if the diameter of the objective lens is more.
R: Objective lens of large diameter collects more light.
96. The name of the blue product of the reaction between ferrous ion and ferricyanide ion is
(a) Thenard blue
(b) Turn bull?s blue
(c) Prussian blue
(d) Ultramarine blue
97. Orthoboric acid on dehydration at 373 K gives
(a) metaboric acid
(b) boric anjydride
(c) boron
(d) Pure boric acid
98. Corundum is an ore of
(a) Copper
(b) Boron
(c) Aluminium
(d) Sodium oil
99. Potassium is stored under
(a) Water
(b) Alcohol
(c) Ammonia
(d) Kerosene
100. Which of the following is incorrect?
(a) Phenol is more acidic than ethanol
(b) I? is stronger nucleophile than F?
(c) CH4 is more acidic than NH3
(d) does not exist
Assertion and Reasoning :
In each of the following questions two statements are given one labelled as the Assertion (A) and the other labelled as the Reason (R). Examine these statements carefully and mark the correct choice as per following instructions.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true.
101. A: 1 gm O2 and O3 have equal number of atoms.
R: Mass of 1 mole molecules is equal to its gram molecular mass.
102. A: Cannizzaro?s reaction is an example of disproportionation reaction.
R: gives Cannizaro?s reaction with concentrated NaOH.
103. A: Best Projection for artificial transmutation of elements is neutron
R: Neutrons are chargless but heavy particles
104. A: The gases which posses low value of critical temperature can be liquefied very easily
R: Critical temperature is a measures of ease of liquefication
105. A: Lyophillic colloid such as gums, cellulose acid act as a protective colloid.
R: Protective power of a lyophillic colloid is expressed in terms of gold number.
106. A: LiOH is a strong base.
R: Li is S-Block element.
107. A: H3PO3 is dibasic acid
R: H3PO3 is mono reducing acid
108. A: Kc increase with temperature for endothermic reaction.
R: Kinetic energy of gaseous molecules increase with temperature.
109. A: O –atom has less electron affinity than S-atom.
R: Additional electron is repelled more effectively by 3p electrons in S than by 2p electrons in O-atom.
110. A: The value of the vander wall?s constant „a? is higher for NH3(g) in comparison to PH3(g).
R: Hydrogen bonding is present in ammonia.
111. A: Dehydration of alcohols gives alkene.
R: Alcohol is more acidic than alkenes.
112. A: For endothermic reactions, by rise of temperature, equilibrium shifts in forward direction.
R: For endothermic reaction, K increases by rise of temperature.
121. Which one of the following belong to the same category?
(a) Cashewnut, coconut and chestnut
(b) Coconut, organge and tomato
(c) Betelnut chestnut and coconut
(d) Mango, almond and coconut
122. The conservation of reduced species “ The need of time” at lower temperature called
(a) Cryopreservation
(b) Chemical preservation
(c) Cryoprotection
(d) Cooling
123. Which one cycle is directly driven by solar radiations?
(a) phosphorus
(b) Carbon
(c) Water
(d) Nitrogen
124. Carrying capacity of a population is determined by its:
(a) Population growth rate
(b) Birth rate
(c) Death rate
(d) Limiting resource
125. Ovule is inverted with body fused to funicle micropyle lying close to hilum and facing the placenta it is:
(a) hemitropous
(b) Orthotropous
(c) anatropous
(d) campylotrpous
126. During elongation of polypeptide chain the sigma factor:
(a) Is released to take part again
(b) Is retained and performs special function
(c) It function is not known
(d) Is used during the closing of chain
127. Operon unit consists of:
(a) Regulator, operator and repressive gene
(b) Regulator, structural and operator gene
(c) Regulator, structural , operator and promote gene
(d) Regulator, structural and promotor gene
128. Succession is:
(a) Gradual convergent directional and continuous process
(b) Series of biotic communities that appear gradually in a baren area
(c) Orderly process of community change till stability
(d) All of the above
129. Site of formation of ribosomal precursor or ribosomal subunits in cell is:
(a) Nucleus
(b) Nucleolus
(c) Nucleus body
(d) stroma
130. The Leghaemoglobin which imparts pink – red colour to the root nodules is located in:
(a) The wall of bacteria
(b) The wall of host cell
(c) The cytoplasm of host cell
(d) In between bacteria and surrounding
131. Which type of forests are found near equator?
(a) Decidous
(b) Tropical
(c) Coniferous
(d) Grasslands
132. A Test cross distinguished between:
(a) Two homozygous forms
(b) Homozygous dominant and heterozygous form
(c) A homozygous recessive and heterozygous form
(d) Two heterozygous form
133. Besides giving out vesicles Golgi bodies are concerned with:
(a) Plastids (b) Lysosomes
(c) grana (d) Cell plate
134. The principle agent of alcoholic fementation and bread making is:
(a) Schizosccharomyces octosporus
(b) Saccharomyces cerevisiae
(c) Saccharomyces ellipsideus
(d) None of the above
135. Artificial application of auxins like IAA, IBA and NAA to unpollinated pistils can from:
(a) Fruits with much flash
(b) Larger fruits
(c) Sweet fruits
(d) Seed less fruits
136. The basic unit of classification is:
(a) species (b) taxon
(c) category (d) sub – species
137. Which type of respiration probably arose first?
(a) Aerobic as it releases more energy
(b) Anaerobic as it releases more energy
(c) Aerobic as it is more complex
(d) Anaerobic as early atmosphere contained little or no oxygen
138. Beggiatoa oxidises:
(a) H2S
(b) S to SO4
(c) Both (a) and (b)
(d) Fe++ to Fe+++
139. A pathogen which cannot be cultured on artificial medium is:
(a) Bacterium
(b) Protozoans
(c) virus
(d) fungus
140. Match column I with column II and choose the correct option from below.
Column I Column II
A. Marginal Placentation I. Sunflower
B. Axile Placentation II. Mustard
C. Parietal Placentation III. Lemon
D. Basal PlacentationIV. Pea
(a) A – IV, B – III, C – II, D – I
(b) A – IV, B – III, C – I, D – II
(c) A – IV, B – I, C – II, D – III.
(d) A – III, B – IV, C – II, D – I