KEAM 2025: KEAM B.Pharm entrance (Physics and Chemistry), session 2
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FINAL ANSWER KEY
Question Paper Code: 10/2025/OL
Exam:KEAM 2025 BPHARM-2
Date of Test: 24-04-2025
1. What is the value of the sum of 12.1100 +18.0 +1.012 as per the rule of significant figures?
A) 31.1220
B ) 31.122
C ) 31.12
D ) 31.1
E ) 31
Correct Answer : Option D
In which of the following spectral region Balmer series lines are observed for atomic
2. hydrogen?
A ) Visible
B ) Ultraviolet
C ) Microwave
D ) Infrared
E ) Radiowave
Correct Answer : Option A
3. The product of uncertainty in position (Δx) and uncertainty in velocity (Δv) has the unit of
A) ms
B ) ms
C) m s
D) m s
E ) ms s
Correct Answer : Option D
4. The inert gas element with the largest positive electron gain enthalpy is
A) He
B ) Ne
C ) Kr
D) Ar
E) Rn
Correct Answer : Option B
5. The IUPAC name of element with atomic number 105 is
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A) Mendelevium
B ) Nobelium
C ) Lawrencium
D ) Rutherfordium
E ) Dubnium
Correct Answer : Option E
6. In which one of the following compounds, there is complete octet of central atom?
A) BF
B ) BeH
C ) SCl
D ) AlCL
E ) LiCl
Correct Answer : Option C
7. Which one of the following molecule/ion has square planar shape?
A) SF
B) NH
C ) CH Cl
D ) CH
E ) XeF
Correct Answer : Option E
8. Which of the following relationship is correct?
A) Cp + Cv = R
B ) Cp / Cv = R
C ) Cp − Cv = R
D ) Cv / Cp = R
E ) Cv − Cp = R
Correct Answer : Option C
Consider the following thermodynamic properties of a system:
9. (i) Volume (ii) Pressure (iii) Density (iv) Heat capacity
The extensive property/properties of the system is/are
A ) (ii) and (iv)
B ) (iv) only
C ) (i), (ii) and (iii)
D ) (i) and (iv)
E ) (iii) and (iv)
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Correct Answer : Option D
10. An aqueous solution of which of the following has the highest pH value?
A ) 0.10 M HCl
B ) 0.50 M H SO
C ) 0.10 M NaOH
D ) 0.5 MHCl
E ) 0.01 MNaOH
Correct Answer : Option C
In the following reaction, the change in oxidation state of Magnesium is
11. 3Mg + N ( ) → Mg N ( )
( )
A) 0 to + 2
B ) 0 to + 3
C ) 0 to + 4
D ) 0 to + 6
E ) 0 to − 2
Correct Answer : Option A
The resistance of 0.10 M KCl solution when measured with a conductivity cell at 298 K is
12. 100 Ώ. If the conductivity of 0.10 M KCl solution is 1.29 Sm , what is the value of cell
constant of the same solution at 298 K?
A) 1.29 m
B ) 1.29 × 10 m
C ) 0.129 cm
D ) 1.29cm
E ) 0.129 m
Correct Answer : Option D
N exerts a partial pressure of 7.648 bar when dissolved in 1 litre of water at 298 K. What
13. is the mole fraction of N at same temperature? ( Henry’s law constant (K ) for N at
298 K = 76.4 k bar)
A) 10
B ) 10
C ) 10
D ) 10
E ) 10
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Correct Answer : Option C
14. An example of pseudo first order reaction is
A ) Thermal decomposition of N O
B) Inversion of cane sugar
C ) Decomposition of gaseous NH on hot Pt surface
D) Radioactive decay of R
E) Hydrogenation of ethene
Correct Answer : Option B
For a first order reaction with rate constant ‘k’, the slope of the line obtained by plotting log
15. ([R ] / [R]) vs time is
A) (k / 2.303)
B ) k × 2.303
C ) ( − k / 2.303)
D ) (2.303 / k)
E ) ( − 2.303 / k)
Correct Answer : Option A
16. The outer electronic configuration of ground state chromium is
A ) 3d 4s
B ) 3d 4s
C ) 3d 4s
D ) 4d 4s
E ) 4d 4s
Correct Answer : Option B
17. The first transition series metal with the highest melting point is
A) Iron
B ) Vanadium
C ) Chromium
D ) Manganese
E ) Copper
Correct Answer : Option C
18. Which of the following 3d metal forms only dihalide?
A) Titanium
B ) Vanadium
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C) Copper
D ) Chromium
E ) Zinc
Correct Answer : Option E
19. When potassium permanganate is heated to 513 K it forms
A ) Mn O and O
B ) MnO and K O
C ) Mn O , MnO and K O
D ) K MnO ,MnO and O
E ) k MnO and O
Correct Answer : Option D
20. Which of the following lanthanoid has the outer electronic configuration 4f 6s in its
ground state?
A ) Neodymium
B ) Gadolinium
C ) Europium
D ) Promethium
E ) Samarium
Correct Answer : Option C
21. Which of the following statement is INCORRECT?
A) The actinoids show in general +3 oxidation state.
B ) Actinoids are less reactive metals.
C ) The magnetic properties of actinoids are more complex than those of lanthanoids.
D ) Hydrochloric acid attacks actinoids.
E ) Nitric acid slightly attacks actinoids.
Correct Answer : Option B
When CoCl solution is treated with excess ammonia, a violet coloured complex is formed
22. which conducts current. Also,it gives one mole of AgCl when treated with AgNO . What
is the chemical formula of the complex?
A)
[CoCl (NH ) ]Cl
B)
[CoCl (NH ) ]
C)
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[CoCl(NH ) ]Cl
D)
[Co(NH ) ]Cl
E)
[Co(NH ) ]Cl
Correct Answer : Option A
23. The IUPAC name of the following complex [Cr(H O) (NH ) ]Cl is
A) Triamminetriaquachromium(III) chloride
B ) Triaquatriamminechromium(III) chloride
C ) Triaquatriamminechromium(II) chloride
D ) Triamminetriaquachromium(II) chloride
E ) Triaquatriamminechromium(III) trichloride
Correct Answer : Option A
24. [Fe(H O) (ONO)]Cl and [Fe(H O) (NO )]Cl are the examples of
A) Solvate isomerism
B ) Geometrical isomerism
C ) Linkage isomerism
D ) Ionisation isomerism
E ) Coordination isomerism
Correct Answer : Option D
25. Which of the following complex ion is diamagnetic?
A ) [MnCl ]
B) [Fe(CN) ]
C) [Co(C O ) ]
D) [FeF ]
E) [CoF ]
Correct Answer : Option C
26. Which one of the following is an example of heterocyclic aromatic compound?
A) Phenol
B ) Aniline
C ) Toluene
D ) Naphthalene
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E) Furan
Correct Answer : Option E
27. Which of the following functional groups will show −R effect?
A ) −OH
B ) −OCH
C ) −NH
D ) −NO
E ) −NHCOCH
Correct Answer : Option D
When bromoethane is treated with metallic Na in dry ethereal solution, n-butane is formed.
28. This reaction is known as
A) Kolbe’s reaction
B ) Wurtz reaction
C ) Williamson reaction
D ) Fittig reaction
E ) Friedel-Crafts reaction
Correct Answer : Option B
29. Which of the following compound does not exhibit aromaticity?
A) Cyclohexene
B ) Benzene
C ) Thiophene
D ) Pyridine
E ) Naphthalene
Correct Answer : Option A
The ortℎo − , para − directing and deactivating group in aromatic electrophilic
30. substitution reaction is
A) −CH
B ) −OH
C ) −Cl
D ) −NO
E ) −COOH
Correct Answer : Option C
31. The hydrocarbon that forms disodium salt with excess metallic sodium is
A) ethane
B ) ethene
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C) benzene
D ) propyne
E ) ethyne
Correct Answer : Option E
32. Which of the following compound will have highest boiling point ?
A ) CH F
B ) CH CH F
C ) CH Cl
D ) CH I
E ) CH Br
Correct Answer : Option E
When chlorobenzene is treated with acetyl chloride in the presence of anhydrous AlCl ,
33.
4-Chloroacetophenone is formed as the major product. It is an example of
A ) Nucleophilic substitution
B ) Electrophilic substitution
C ) Free radical substitution
D ) Nucleophilic addition
E ) Electrophilic addition
Correct Answer : Option B
34. An optically active compound among the following is
A) 1-Chlorobutane
B ) neo-Pentyl chloride
C ) Isobutyl chloride
D ) tert-Butyl chloride
E ) 2-Chlorobutane
Correct Answer : Option E
35. Phenetole is
A) Ethoxybenzene
B ) Methoxyethane
C ) Methoxybenzene
D ) 1-Methoxypropane
E ) 2-Methoxypropane
Correct Answer : Option A
36. Acetone can be converted into 2-methylpropan-2-ol using
A ) Pd / H
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Nitrobenzene is treated with Sn / HCl to give a compound (X) which on treatment with N
41. aNO and HCl at 278 K gives compound (Y). When the compound (Y) is treated with C
u / HBr , compound ‘Z’ is obtained. The compound ‘Z’ is
A ) Benzene
B ) Benzene diazonium bromide
C ) Phenol
D ) Bromobenzene
E ) Chlorobenzene
Correct Answer : Option D
42. Carbylamine is obtained when aniline is
A ) heated with Con.H SO
B ) treated with NaNO / HCl
C ) heated with CHCl and ethanolic KOH
D ) treated with CHCl and HCl
E ) treated with HCl
Correct Answer : Option C
The following amines are having same molecular masses.
43. (i) n − C H NH (ii) (C H ) NH (iii) C H N(CH )
The correct order of boiling point of the above amines is
A ) (i) > (ii) > (iii)
B ) (ii) > (iii) > (i)
C ) (iii) > (i) > (ii)
D ) (ii) > (i) > (iii)
E ) (i) > (iii) > (ii)
Correct Answer : Option A
44. Which of the following vitamin deficiency causes convulsions?
A) Riboflavin
B ) Thiamine
C ) Ascorbic acid
D ) Pyridoxine
E ) Vitamin D
Correct Answer : Option D
45. Which of the following amino acid is optically inactive?
A) Glycine
B ) Alanine
C ) Valine
D ) Leucine
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E) Arginine
Correct Answer : Option A
46. The value of one barn in SI unit is
A ) 10 m
B ) 10 m
C ) 10 m
D ) 10 m
E ) 10 m
Correct Answer : Option A
If a moving body changes its position from x to x in a time interval
47. Δt , then is defined as
A) average acceleration
B ) average velocity
C ) instantaneous acceleration
D ) instantaneous velocity
E ) average displacement
Correct Answer : Option B
48. A car at rest is accelerated at 2ms for 1 minute and then retarded at 2ms for 1
minute to attain rest. The distance travelled by the car is
A ) 3600 m
B ) 1800 m
C ) 9600 m
D ) 4800 m
E ) 7200 m
Correct Answer : Option E
If the forces acting on two bodies of masses 2 kg and 3 kg are same , then the ratio of their
49. respective accelerations is
A) 1:1
B) 1:2
C) 2:3
D) 3:2
E) 4:9
Correct Answer : Option D
50. The area under the curve drawn between the force F and time t is
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A) torque
B ) impulse
C ) work done
D ) power
E ) kinetic energy
Correct Answer : Option B
A rain drop of mass 10 g falls from a height of 50 m from rest. If the loss of energy due to
51. air resistance is 3 J , then the velocity of the drop on striking the ground is (g = 10ms
)
A) 10 m s
B ) 5 ms
C ) 30 ms
D ) 40 ms
E ) 20 ms
Correct Answer : Option E
A lift with a load of 1000 kg is moving up against the frictional force 2000 N . If the power
52. delivered to it by the operating motor is 36000 W, then the speed of the lift is (g = 10m
s )
A) 2 ms
B) 4 ms
C) 3 ms
D) 6 ms
E) 10 ms
Correct Answer : Option C
The CORRECT statement for a rigid body rotating about a fixed axis with angular velocity
53. ω is
A) ω is directed perpendicular to the axis of rotation
B ) all the particles move with same speed
C ) ω is a scalar quantity
D ) ω has no direction
E ) different particles move in different circles
Correct Answer : Option E
If the moment of inertia of a circular disc about its central axis is I, then that for the same
54. disc about its diameter is
A) I
B ) 2I
C ) 4I
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D)
E)
Correct Answer : Option D
The line that joins any planet to the sun sweeps out equal areas in equal intervals of time.
55. This statement is
A) Kepler’s first law
B ) law of periods
C ) law of gravitation
D ) Kepler’s second law
E ) Newtons third law
Correct Answer : Option D
56. Young’s modulus and shear modulus can be defined only in
A) solids and liquids
B ) liquids
C ) gases
D ) gases and liquids
E ) solids
Correct Answer : Option E
If T and η are the surface tension and coefficient of viscosity of a liquid, then with the
57. increase of temperature
A) both T and η increase
B ) both T and η decrease
C ) both T and η remain constant
D ) T increases but η decreases
E ) T decreases but η increases
Correct Answer : Option B
The speed of water flowing out from the small opening at a depth of ℎ from the surface of
58. water in a large tank is
A) gℎ
B) 4gℎ
C ) gℎ
D ) 2gℎ
E) 2gℎ
Correct Answer : Option E
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59. For a diatomic gas molecule the value of C in Jmol K is ( R = 8.2 Jmol K )
A) 20.5
B ) 41
C ) 10.25
D ) 12.3
E ) 28.7
Correct Answer : Option A
A steel rod of length 1 m is clamped at its middle . If the fundamental frequency of
60. vibrations is 3 kHz , then the speed of sound in steel is
A) 2000 ms
B) 6000 ms
C) 8000 ms
D) 4000 ms
E) 9000 ms
Correct Answer : Option B
The frequency of the periodic wave for the following figure is
61.
A) 1 MHz
B ) 0.25 MHz
C ) 0.5 MHz
D ) 0.1 MHz
E ) 0.05 MHz
Correct Answer : Option B
The electrostatic force between two point charges at a distance of separation d is F. If one
62. of the charge is moved away by a distance d/2 then the force between them is
A) F
B) F
C) F
D) F
E) √2F
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Correct Answer : Option C
63. Which one of the following molecules is nonpolar?
A ) CO
B) H O
C ) CH OH
D ) HCl
E ) NaCl
Correct Answer : Option A
The resistance of a wire of length l and cross sectional area A is R . The resistance of
64. another wire of the same material of length 3l and cross sectional area is
A) 3R
B) R
C ) 9R
D)
E)
Correct Answer : Option C
The energy dissipated per unit time by a wire of resistance 2R connected to a battery of
65. voltage 2V is
A)
B)
C)
D) 4VR
E) 4V R
Correct Answer : Option C
66. The magnetic field at the centre of a current loop of radius r carrying a current I is
A)
B)
C)
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D)
E)
Correct Answer : Option A
If a current of 1 A is passed through a 1 m long solenoid of 7000 turns , the magnetic field
67. produced at the middle of the solenoid is
A) 2.2 × 10 T
B ) 4.4 × 10 T
C ) 7.0 × 10 T
D ) 8.8 × 10 T
E ) 14.0 × 10 T
Correct Answer : Option D
68. The a.c circuit exhibiting the phenomenon of resonance has/have the circuit element(s)
A) inductor and resistor
B ) capacitor and resistor
C ) inductor only
D ) capacitor only
E ) inductor and capacitor
Correct Answer : Option E
69. The vibrations of atoms and molecules produce electromagnetic radiation in the region of
A) ultraviolet
B ) infrared
C ) visible light
D ) microwaves
E ) X – rays
Correct Answer : Option B
70. Monochromatic ray of light incident on a glass prism does not produce the phenomenon of
A) dispersion
B ) refraction
C ) deviation
D ) reflection
E ) total internal reflection
Correct Answer : Option A
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The simple microscope having a lens of focal length 5 cm gives the magnification of (least
71. distance of distinct vision = 25 cm)
A) 5
B) 6
C) 4
D ) 10
E ) 12
Correct Answer : Option B
If the threshold wavelength of a photoelectric material lies in the green light region, then
72. which one of the following light will not emit photoelectrons?
A) Ultraviolet
B ) Blue
C ) Violet
D ) Orange
E ) Indigo
Correct Answer : Option D
73. The process that releases neutrons from the nucleus is
A ) α - decay
B ) β - decay
C) nuclear fusion
D ) pair production
E ) nuclear fission
Correct Answer : Option E
If the volume of nucleus having mass number 2 is V , then that for the nucleus having
74. mass number 8 is
A) 2V
B ) 3V
C ) 4V
D ) 6V
E ) 9V
Correct Answer : Option C
75. If a diode is forward biased, then the
A) p-n junction provides very low resistance
B ) width of the depletion layer increases
C ) potential barrier increases
D ) amount of current flow is in the range of microampere
E ) current flow is due to minority carriers only
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Correct Answer : Option A
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Source: Commissioner for Entrance Examinations. Question paper published by Commissioner for Entrance Examinations.