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51. Lanthanoids are
a) 14 elements in the seventh period (atomic
no. = 90 to 103) that are filling 5f sublevel
b) 14 elements in the sixth period (atomic no
= 58 to 71) that are filling 4f sublevel
c) 14 elements in the seventh period (atomic
no = 58 to 71) that are filing 4f sublevel
d) 14 elements in the sixth period (atomic no
= 90 to 103) that are filing 4f sublevel
Ans:b
52. Which of the following forms cationic
micelles above certain concentration ?
a) Sodium acetate
b) Urea
c) Cetyltrimethylammonium bromide d) Sodium dodecyl sulphate
Ans:c
53. Which of the following dose not have a metal
- carbon bond ?
a)  b) 
c)  d) 
Ans:d
54. Which one of the following is a chain
growth polymer ?
a) Nucleic acid
b) Polystyrene
c) Protein
d) Starch
Ans:b
55. The correct statement in respect of
protein hemoglobin is that it
a) Maintains blood sugar level
b) Acts as an oxygen carrier in the blood
c) Forms antibodies and offers resistance
to diseases
d) Functions as a catalyst for biological reactions
Ans:b
56. A sequence of how many nucleotides in
messenger RNA makes a codon for an anion acid ?
a) Four b) One c) Two d) Three
Ans:d
57. The hormone that helps in the conversion
of glucose to glycogen is
a) Bile acids b) Adrenaline c) Insulin d) Cortisone
Ans:c
58. Which of the following ions considered to be
an anticancer species ?
a)  b) 
c)  d) 
Ans:b
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59. In the bond energies of H—H, Br—Br, and
H—Br are 433, 192 and 364 KJ  respectively, the  for the reaction  is
a) + 103 KJ b) + 261 KJ
c) - 103 KJ d) -261 KJ
Ans:c
60. Which of the following is responsible for
depletion of the ozone layer in the upper strata of
the atmosphere ?
a) Ferrocene b) Fullerenes
c) Freons d) Polyhalogens
Ans:c
61. Among the following, the pair in which the
two species are not isostructural is
a)  b) 
c)  d) 
Ans:d
62. The rate of a first order reaction
is   at 0.5M concentration of the reactant. The half life of the reaction is
a) 23.1 min b) 8.73 min
c) 7.53 min d) 0.383 min
Ans:a
63. Which of the following structures represents
the peptide chain ?
a) 
b) 
c) 
d) 
Ans:b
64. Which one of the following can be oxidised to
the corresponding carbonyl compound ?
a) Ortho-nitro-phenol
b) Phenol
c) 2-methyl-2-hyroxy-propane
d) 2-hydroxy-propane
Ans:d 65.
In an octahedral structure the pair of d orbitals involved in  hybridization is
a)  b) 
c)  d) 
Ans:d
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