83. The disease in which bronchial tubes become narrow due to spasm of the bronchial muscles and swelling of the
mucous membrane is called
(a) Pneumonia
(b) Asthma
(c) Diptheria
(d) Tuberculosis
84. The nucleus of a carbon atom contains
(a) 6 protons and 6 neutrons
(b) 6 electrons and 6 protons
(c) 6 neutrons and 6 electrons
(d) 6 electrons and 4 protons
85. X-rays are similar to
(a) α –rays
(b) β-rays
(c) -rays
(d) Radio waves
86. What is the normal temperature of a human being ?
(a) 21.7°C
(b) 36.9°C
(c) 85.1°C
(d) 102°C
87. “VIBGYOR” is connected with the
(a) Electromagnetic waves
(b) Solar spectrum
(c) Name of a star
(d) Name of a satellite
88. Which of the following is not a metal ?
(a) Tungsten
(b) Hydrogen
(c) Titanium
(d) Antimony
89. Two wires are of the same material and length. But the radius of one is two times of the other. Therefore, their resistances will be in the ratio of
(a) 1 : 4
(b) 4: 1
(c) 2:1
(d) 1 : 2
90. What is the criterion for selecting a fuse wire ?
(a) It should have high resistance
(b) It should have low melting point
(c) It should have high melting point
(d) None of these
91. An object X falls freely from rest for 1 second, another object Y falls for 2 seconds. Then the distance covered by the object Y is how many times the distance covered by the object X ?
(a) Four times
(b) Three times
(c) Two times
(d) Same
92. Sweetmeat, eaten in between meals, tends to reduce the appetite at meal time because
(a) The stomach gets filled up
(b) The glucose level in the blood rises
(c) Taste buds of the tongue doesn’t relish the food
(d) Sweets always spoil the appetite
93. What is the process involved in the photosynthesis ?
(a) Organic compounds are synthesized from water and carbon dioxide and oxygen is released in the atmosphere
(b) Potential energy is released to form free energy
(c) Food is oxidised to form carbon dioxide and water
(d) Free energy is converted into potential energy and stored
94. Which one of the following statements is incorrect ?
(a) A catalyst is highly specific in action
(b) A catalyst alters the rates of the forward and backward reactions equally in a reversible reaction
(c) A catalyst is used up in the course of the reaction
(d) A catalyst remains unchanged at the end of a chemical reaction
95. What is the approximate circumference of the earth at the equator ?
(a) 25,000 km
(b) 8,000km
(c) 40,000km
(d) 13,000 km
96. Which is the brightest planet ?
(a) Mercury
(b) Venus
(c) Mars
(d) Jupiter
97. The planet which revolves very slowly around the sun is the
(a) Jupiter
(b) Pluto
(c) Saturn
(d) Mercury
98. The mass of the moon in comparison to the earth is
a) ℎ
b)
c) ℎ
d) ℎ
99. Which is the natural satellite of the earth ?
(a) Mars
(b) Moon
(c) Jupiter
(d) Pluto
100. The sum total of all chemical processes in the body is called
(a) Respiration
(b) Metabolism
(c) Vulcanisation
(d) Photosynthesis
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