STATE INSTITUTE OF EDUCATIONAL TECHNOLOGY
Model Medical Entrance - 2007
CHEMISTRY
Version Code-A1
___________________________________________________________________________
1.
The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in a
hydrogen atom will be
(Given ionisation energy of hydrogen = 2.18 x 10-18J atom-1 and h = 6.625 x 10-34Js)
a) 3.08 x 1015s-1
b) 2.00 x 1015s-1
c) 1.54 x 1015s-1
d) 1.03 x 1015s-1
e) 1.3 x 1015s-1
2.
In an octahedral structure, the pair of d-orbitals involved in d2sp3 hybridisation is
a) dz2, dxy
b) dxy, dxz
c) dz2, dx2-y2
d) dx2-y2, dxy
e) dxy, dyz
3.
60
The radioactive isotope 27
Co , which is used in the treatment of cancer, can be made by
(n, p) reaction. For this reaction the target nucleus is
60
a) 60
b) 27
c) 59
Co
28 Ni
28 Ni
59
27
d)
Co
e)
61
27
Co
4.
Maximum number of molecules is present in
a) 0.5g of H2 gas
b) 10g of O2 gas
c) 15L of H2 gas at STP
d) 5L of N2 gas at STP e) All have same number
5.
If the bond energies in H-H, Br-Br and H-Br are 433, 192 and 364 kJ mol-1 respectively,
the H for the reaction H2(g) + Br2(g)  2HBr(g) is
a) 261kJ
b) -103kJ
c) -261kJ
d) 103kJ
e) 50 kJ
0
6.
Match the lists I and II and pick the correct matching from the codes given
List I
a
b
c
d
e
a)
c)
e)
Helium
Argon
Neon
P4O10
PCl5
a-3, b-2, c-1. d-4, e-5
a-3, b-2, c-4, d-5. e-1
a-5, b-2, c-1, d-3, e-4
1
2
3
4
5
1
List II
Chlorinating agent
Inert atmosphere in metallurgy
Cryogenics
Advertising signs
Dehydrating agent
b) a-3, b-4, c-1, d-5, e-2
d) a-5, b-4, c-1, d-2, e-3
7.
Considering entropy (S) as a thermodynamic parameter, the criterion for spontaneity of
any process is
a)  S system> 0 only
b)  S (Surrounding)>0 only
c)  S (system) +  S (Surrounding) > 0
d)  S (System) -  S (Surrounding) > 0
e)  S(system) =  S(Surrounding)
8.
H2O is dipolar whereas BeCl2 is not. It is because
a) H2O is linear and BeCl2 is angular
b) H2O is angular and BeCl2 is linear
c) The electronegativity of F is greater than that of O
d) H2O can associate through H-bonding whereas BeCl2 cannot
e) H2O is covalent whereas BeCl2 is ionic
9.
In a regular octahedral molecule, MX6, the number of X - M-X bonds at 1800 is
a) Six
b) Four
c) Two
d) Three
e) One
10. The work done during the expansion of a gas from a volume of 5dm3 to 7dm3 against a
constant pressure of 3 atm is (1L atm = 101.32J)
a) 304J
b) -304J
c) -6J
d) -608J
e) 152J
11. The rate of a first order reaction is 1.5 x 10-2 mol L-1 min-1 at 0.5M concentration of the
reactant. The half life of the reaction is
a) 8.73min
b) 7.53min
c) 23.1min
d) 0.383min
e) 2.31min
12. Among the following, the pair in which the two species are not isostructural is
a) SiF4 and SF4
b) BH-4 and NH+4
c) PF-6 and SF6
d) IO 3 and XeO3
e) CH4 and CCl4
13. The solubility product of a sparingly soluble salt AX2 is 3.2 x 10-11. Its solubility (in
mol / litre ) is
a) 2 x 10-4
b) 4 x 10-4
c) 5.6 x 10-6
d) 3.1 x 10-4
e) 2.5 x 10-4
14. Match the lists I and II and pick the correct matching from the codes given.
List I
a
b
c
d
e
a)
c)
e)
List II
Aluminium
Copper
Potassium
Magnesium
Radium
a-1, b-3, c-4, d-5, e-2
a-4, b-5, c-2, d-1, e-3
a-1, b-3, c-5, d-2, e-4
1
2
3
4
5.
2
Bauxite
Dolomite
Pyrites
Pitch blende
Sylvine
b) a-1, b-3, c-4, d-2, e-5
d) a-4, b-2, c-1, d-5, e-3
15. Among the following series of transition metal ions, the one where all metal ions have
3d2 electronic configuration is
a) Ti4+, V3+, Cr2+, Mn3+
b) Ti2+, V3+, Cr4+, Mn5+
c) Ti3+, V2+, Cr3+, Mn4+
d) Ti+, V4+, Cr6+, Mn7+
2+
2+
3+
+4
e) Ti , V , Cr , Mn
(At Nos. Ti = 22, V = 23, Cr = 24, Mn = 25)
16. Considering H2O as a weak field ligand, the number of unpaired electrons in
[Mn(H2O)6]2+ will be (at. no. Mn = 25)
a) 2
b) 4
c) 3
d) 5
e) 6
17. Among [Ni(CO)4], [Ni(CN)4]2-, [NiCl4]2- species, the hybridization states at the Ni atom
are respectively
a) sp3, sp3, dsp2
b) dsp2, sp3, sp3
c) sp3,dsp2,dsp2
d) sp3, dsp2, sp3
e) sp3,sp3,sp3
18. Which of the following co-ordination compounds would exhibit optical isomerism?
a) trans-dicyanobis (ethylene diamine) cobalt (III) chloride
b) tris (ethylene diamine) chromium (III) chloride
c) Pentaaquonitrocobalt (III) bromide
d) Diamminedichloro platinum (II)
e) All
19. A compound formed by elements A and B crystallizes in a cubic structure. Here A atoms
are at the corners and B atoms are at the face centers. Then the formula of the compound
is
a) AB
b) A2B
c) AB2
d) AB3
e) AB4
20. How many structural isomers are possible when one of the hydrogen atoms from
diphenyl methane is replaced by one chlorine atom
a) 4
b) 5
c) 6
d) 9
e) 7
21. Using anhydrous AlCl3 as catalyst, which one of the following reactions produces ethyl
benzene?
a) CH3-CH2-OH+C6H6 b) C2H5Cl + C6H6
c) C2H6 + C6H5Cl
d) C6H5OH+C2H5Cl
e) CH3-CH=CH2+C6H6
22. A white solid compound A on heating produces a residue B, liberating CO2 gas. B on
mixing with water produces C. On passing excess of CO2 gas through C, a compound D
is formed. On strong heating D is converted back to A. Then the compound A is
a) K2CO3
b) Na2CO3
c) CaCO3
d) Rb2CO3
e) NiCO3
23. Among Na, K, Ca, Cu and Zn the element which can form more than one binary,
compound with chlorine is
a) Na
b) K
c) Ca
d) Cu
e) Zn
3
24. Chloretone is formed by the reaction between
a) Chlorine and acetone
c) Chlorine and chloroform
e) Chloroform and phenol
b) Chloroform and acetone
d) Chloroform and nitric acid
25. Which of the following will form a yellow precipitate on heating with an alkaline
solution of iodine?
a) CH3OH
b) CH3-CH2-CH2OH c) CH3-CH2-CO-CH2-CH3
d) CH3CH(OH)-CH3
e) (CH3)3COH
26. The OH group from an alcohol and carboxylic acid can be replaced by Cl using
a) Chlorine water
b) HCl
c) PCl3
d) HClO
e) Cl2 in CCl4
27. Which of the following is a step growth polymer?
a) Bakelite
b) Polystyrene
c) Polythene
d) PVC
e) Polybutadiene
28. Which among the following is not an organometallic compound?
a) K[Pt Cl3 (C2H4)]
b) Fe(CO)5
c) C2H5MgCl
d) Ti(OC2H5)4
e) Fe(C5H5)2
29. The number of ions produced per molecule of the complex [Co(NH3)3Cl3] is
a) 6
b) 3
c) 4
d) 2
e) 0
30. The hormone which maintains the glucose level in blood is
a) Insulin
b) Adrenaline
c) Oxytocin
d) Androgen
e) Cortisone
31. The ozone layer in the upper atmosphere is depleted by the presence of
a) Ferrocene
b) Freons
c) Fullerenes
d) Chlorine
e) F2
32. According to Bohr’s theory, the angular momentum of an electron in the 2nd orbit is
e)
3h

33. Which of the orbital does not have spherical node?
a) 2s
b) 3p
c) 4d
d) 2p
e)
3s
34. The anion F- is isoelectronic with
a) Clb) K+
c) O2-
e)
N2-
a)
2h

b)
h
2
c)
h

d)
d) N3+
35. Which of the following overlap is correct?
a)
+ - +
1s
1s
3h
2
+
4
e)
-
+
-
+
-
+
-
+
-
-
c)
+
+
+
+
+
-
b)
+
-
+
-
-
-
d)
None
36. The edge length of a fcc unit cell is 508 pm. If the radius of cation is 105 pm, the radius
of anion is
a) 105 pm
b) 254.2 pm
c) 718.4 pm
d) 359.2 pm
e) 144 pm
37. The rate constants for a reaction is 2 x 10-2s-1 at 270C and 8 x 10-2s-1 at 570C. Activation
energy of the reaction is
a) 15.5kJ
b) 45kJ
c) 38kJ
d) 25kJ
e) 58.78kJ
38. The reaction in which hydrogen peroxide acts as a reducing agent is
a) PbS + 4H2O2  PbSO4 + 4H2O
b) 2KI +H2O2  2KOH + I2
c) 2FeSO4 + H2SO4 + H2O2  Fe2 (SO4)3 + 2H2O
d) Ag2O + H2O2  2Ag + H2O + O2
e) H2SO3 + H2O2  H2SO4 + H2O
39. When electricity is passed through an aqueous solution of aluminium chloride, 13.5g of
Al is deposited. The number of Faradays of electricity passed is
a) 2
b) 1
c) 1.5
d) 2.5
e) 3
40. The coagulation of 10 ml of gold sol is completely prevented by the addition of 0.015g
of starch to it. Gold number of starch is
a) 0.015
b) 0.15
c) 1.5
d) 15
e) 150
41. t½ of a radioactive element is 50 days. After 200 days, two grams of the element will be
reduced to
a) 0.5g
b) 0.25g
c) 0.125g
d) 1g
e) 0.0625g
42. Which among the following is least soluble?
a) MgSO4
b) CaSO4
d) SrSO4
e) BaSO4
c) BeSO4
43. In diborane
a) The two boron atoms are linked by a covalent bond
b) The structure is similar to that of C2H6
5
c)
d)
e)
All the atoms lie on a single plane
The two boron atoms are linked through hydrogen bridges
All are correct
44. The correct formula of plaster of paris is
a) CaSO4
b) CaSO4.H2O
d) CaSO4. 2 H2O
e) MgSO4 ½ H2O
c) CaSO4 ½ H2O
45. Which of the following oxides of nitrogen is neutral?
a) NO
b) NO2
c) N2O4
d) N2O3
e) N2O5
46. In pyrosilicate two tetrahedral units are joined at
a) four points
b) three points
d) one point
e) not connected
c) two points
47. The electron affinity of halogens follows the order.
a) F>Cl>Br>I
b) Cl>F>Br>I
c) I>Br>Cl>F
d) Br>F>Cl>I
e) F>Br>Cl>I
48. The correct order of acid strength is
a) HCl<HClO2<HClO3<HClO4
c) HClO3<HClO4<HClO<HClO2
e) HClO4<HClO<HClO3<HClO2
b) HClO4<HClO3<HClO2<HClO
d) HClO2<HClO4<HClO<HClO3
49. Match list I with list II and select the answer using the codes given below.
Code
a
b
c
d
a)
c)
e)
List I
XeF4
XeF6
XeO3
XeO4
Code
1
2
3
4
a = 3, b = 1, c = 4, d = 2
a = 2, b = 3, c = 1, d = 4
a = 1, b = 2, c = 3, d = 4
List II
Distorted Octahedral
Tetrahedral
Square planar
Trigonal pyramidal
b) a = 4, b = 1, c = 3, d = 2
d) a = 2, b = 3, c = 4, d = 1
50. Iron is protected by coating it with a thin layer of
a) Cu
b) Zn
d) Pb
e) C
c) Ag
51. During the preparation of KMnO4, Pyrolusite is converted to KMnO4. Here the oxidation
state of Mn changes from
a) 2 to 6
b) 4 to 6
c) 4 to 7
d) 1 to 2
e) 2 to 7
6
52. Which of the following salts will be coloured?
a) Zn(NO3)2
b) NaNO3
d) Co(NO3)3
e) Potash alum
c) Al(NO3)3
53. Hexafluoroferrate III ion is an outer orbital complex. The number of unpaired electrons
present in it is.
a) 1
b) 4
c) 5
d) 3
e) 6
54. Olefins are polymerized using
a) Wilkinson’s Catalyst
c) Zeise’s Catalyst
e) Pt. Catalyst
b) Pd
d) Zeigler Natta Catalyst
55. In photography Na2S2O3.5H2O is used
a) for reduction of AgBr to Ag
b) for conversion of AgBr to Ag2SO4
c) for the conversion of AgBr to soluble thiosulphate complex
d) for the conversion of AgBr to silver thiosulphate
e) None of the above
56. Terylene is made by polymerisation between terephthalic acid and
a) Ethylene glycol
b) Glycerol
c) Phenol
d) Ethanol
e) Methanol
57. Which of the following is present in DNA and not in RNA
a) Uracil
b) Guanine
c) Thymine
d) Adenine
e) Cytosine
58. In polysaccharides, the different monosaccharide units are linked by
a) Peptide linkage
b) Glycosidic linkage
c) Phosphate linkage
d) Ester linkage
e) Nucleoside linkage
59. Ascorbic acid is the chemical name of
a) Vitamin A
b) Vitamin B12
d) Vitamin D
e) Vitamin K
c) Vitamin C
60. The pH of 5 x 10-8 M solution of HCl is
a) 8
b) 7
d) between 6 and 7
e) more than 8
c) 5
61. Which among the following is an artificial antioxidant?
a) BHA
b) Vitamin C
c) Vitamin E
d) Sodium benzoate
e) Ascorbic Acid
62. When 100ml of .1 MNaOH are added to 50 ml of 0.2 MHCl at 250C, pH of the resulting
solution is
7
a)
d)
7
0
b) grater than 7
e) between 6 and 7
c) less than 7
63. Which of the following is not correct with respect to ethyl amine and aniline
a) Both hove- NH2 group
b) Both react with HCl
c) Both react with a mixture of CHCl3 and KOH to produce unpleasant smelling gas
d) Both react with a mixture of NaNO2 and HCl to produce hydroxy compounds
e) All are wrong
64. Match list I and list II and select the correct answer using the codes given below.
List I
1.
2.
3.
4.
List II
Moderator
Control rods
Fuel rod
Coolant
Codes
a) 1-b, 2-a, 3-c,4-e
d) 1-c, 2-d, 3-a, 4-b
a
b
c
d
e
b) 1-b, 2-c, 3-a, 4-e
e) 1-d, 2-c, 3-b, 4-a
Uranium
Graphite
Boron
Lead
Sodium
c) 1-c, 2-b, 3-a, 4-e
65. Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K
are -382.64kJ mol-1 and -145.6JK-1 mol-1, respectively. Standard Gibbs energy change
for the same reaction at 298K is
a) -439.3kJ mol-1
b) -523.2kJ mol-1
c) -221.1kJ mol-1
-1
-1
d) -339.25kJ mol
e) +339.25 kJ mol
66. The standard emf of a galvanic cell involving cell reaction with n = 2 is found to be
0.295V at 250C. The equilibrium constant of the reaction would be
a) 1 x 102
b) 1.0 x 1010
c) 2.0 x 1011
d) 4 x 1012
e) 3 x 104
(F = 96500C and R = 8.314 JK-1mol-1)
67. Number of chiral carbon atoms in  -D(+) glucose is
a) One
b) Two
c) Three
d) Four
e) Five
68. Reaction of HBr with propene produces
a) n-propyl bromide
b) Isopropyl bromide c) Allyl bromide
d) Polypropylene
e) Propane
69. Hydrolysis of C6H5CCl3 produces
a) Benzyl alcohol
b) Benzaldehyde
c) Benzoic Acid
d) Benzyl chloride
e) Benzoil chloride
70. Which of the following solutions have the highest freezing point?
a) 0.1M AlCl3
b) 0.1M Urea
c) 0.1MNaCl
8
d)
0.1 M CaCl2
e) 0.1 M BaCl2
71. Titanium shows magnetic moment of 1.73 BM in its compound. Which is the oxidation
state of Ti in the compound?
a) +1
b) +2
c) +3
d) +4
e) O
72. The first four ionization energies of an element are 185, 450, 780 and 5700 kJ. The
number of valence electrons in the element is
a) 1
b) 2
c) 3
d) 4
e) 5
9