TNPSC
Exam-GROUP- IV - Subject wise analysed Previous Year questions and Answers-Science-Part-4
(Special Exam – 2008)
74. If there were no atmosphere, what would
be the colour of the sky?
A)
Blue B) white
C) Red D) Black
Ans : (D)
75. Sun’s energy is produced by
A)
nuclear fission
B) nuclear fusion
C) burning of gasses
D) presence of hydrogen
Ans : (B)
76. The widely used antibiotic Penicillin is
produced by
A)
an Alga B) a
Bacterium
C) a Fungus D) a Plant
Ans : (C)
77. Which is the largest single cell?
A)
Ostrich egg B) Paramoecium
C) Euglena D) Hydra
Ans : (A)
78. The treatment given for kidney
malfunctioning is
A)
Dialysis B) Acupuncture
C) EC.G. D) Angioplasty
Ans : (A)
79. The blood vessels which carry blood from
heart are called
A)
artery B) vein
C) capillaries D) vena
cava
Ans : (A)
80. The first set of teeth that appear in
childhood are called
A)
Canines B) Milk
teeth
C) Wisdom teeth D) Permanent
teeth
Ans : (B)
81. The fins that help in changing direction
while swimming are
A)
Dorsal fins B) Pectoral
fins
C) Pelvic fins D) Caudal
fins
Ans : (D)
82. Culture of fish is called
A)
Pisciculture B) Sericulture
C) Vermiculture D) Agriculture
Ans : (A)
83. The functional unit of the skeletal
muscle is
A)
myosin B) actin
C) sarcomere D) myofibril
Ans : (C)
84. In a plant cell D.N.A. is found in
A)
chloroplast B) mitochondria
C) nucleus D) all of these
Ans : (D)
85. A plant cell is distinguished from an
animal cell by the presence of
A)
chromosome B) cell
wall
C) cell membrane D) nucleus
Ans : (B)
86. Which one of the following wavelengths of
light is most effective in photosynthesis?
A)
Blue B) Green
C) Orange D) Yellow
Ans : (A)
87. The age of tree can be calculated by
A)
measuring its height
B) measuring its diameter
C) analysis of its sap
D) counting annual growth rings
Ans : (D)
88. Epidermis, the outermost layer of leaf is
perforated by small pores for gaseous exchange. These are called
A)
hydathodes B) stigmata
C) stomata D) stroma
Ans : (C)
89. Joule’s law of heating is given by
A)
H = IR2t B) H = I2Rt2
C) H = I2Rt D) H = IRt2
Ans : (C)
90. The persistence of vision is
1 3
A) 32
s B) 24 s
1 1
C) 16 s D) 8 s
Ans : (C)
91. The unit of latent heat of fusion is
A)
J kg-1 K-1 B) J kg-1 K-1
C) J kg K-1 D) J K-1
Ans : (B)
92. Which of the following is used as control
rod in the nuclear reactor?
A)
Cadmium B) Boron
C) Hafnium D) All
of these
Ans : (D)
93. The centripetal force required by a car
of mass 500 kg which takes a round turn of redius 50 m with a velocity of 20 m
s-1 is
A)
4000 N B) 5000
N
C) 200 N D) 1250 N
Ans : (A)
94. Sodium carbonate is used in
A) softening of hard water
B) fire extinguishers
C) ceramic industries
D) tanning industries
Ans : (A)
95. In the following reaction copper is
obtained as
CuSO4 + Zn ® ZnSO4 +
Cu ¯
A)
gas B) liquid
C) solid D) precipitate
Ans : (D)
96. Which one of the following is correctly
matched?
A)
Ammonia - Allotropv
B) Sulphuric acid - Dehydrating agent
C) Sulphur dioxide - Haber process
D) Sulphur - Lightest element
Ans : (B)
97. An organic compound by the action of
enzymes leads to the formation of smaller molecules. It is called
A)
fermentation B) esterification
C) oxidation D) dehydrogenation
Ans : (A)
98. A catalyst used in the manufacture of
ammonia by Haber process is
A)
Copper
B) Iron
C) Cobalt
D) Ammonium chloride
Ans : (B)
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