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Basic Science (Objective) (Pages :27)
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121 Which is the element found on the surface of the moon?

Ans : Titanium
122 Why is ‘Beaufort Scale’ used?

Ans : To measure wind velocity
123 When does Relative humidity decreases?

Ans : With increased temperature
124 A man with a dark skin, in comparison with a man with a white skin, What will experience?

Ans : Less heat and less cold
125 How are Oxygen and ozone?

Ans : Allotropes
126 In which is ‘Foot and Mouth Disease’ found?

Ans : Cattle
127 What denotes the smallest temperature?

Ans : 1° on the Kelvin scale
128 In which latitudes largest quantities of bauxite is found?

Ans : Tropical latitudes
129 Which tree, once very popular in social forestry, is now taken to be environmental hazard?

Ans : Eucalyptus
130 Foot-and-Mouth disease in animals, a current epidemic in some parts of the world, By which is this caused?

Ans : Bacterium
131 In which animal is respiration done by skin?

Ans : Frog
132 ‘Gobar gas’ contains mainly which gas?

Ans : Methane
133 Which rocks is transformed into marble?

Ans : Limestone
134 By which number the quality of gasoline’ sample is determined?

Ans : By its octane number
135 Due to bite of mad dog the disease hydrophobia is caused by which virus?

Ans : Rabies virus
136 What is the principal reason for the formation of metamorphic rocks?

Ans : Extreme heat and pressure
137 A temperature at which both the Fahrenheit and the centigrade scales have the same value?

Ans : -40°
138 Which type of glass is used for making glass reinforced plastic?

Ans : Quartz glass
139 Which is the element that has the highest first ionization potential?

Ans : Nitrogen
140 Which tissue take part in healing the wounds?

Ans : Epithelium tissue
141 Temporary hardness of water is due to the presence of which thing?

Ans : Magnesium bicarbonate
142 Which energy of the electron at absolute zero is called?

Ans : Fermi energy
143 What is the characteristic odour of garlic?

Ans : A sulphur compound
144 Which is the vitamin that is most readily manufactured in our bodies?

Ans : Vitamin D
145 In human body, which are the leg bones?

Ans : Humerus and Femur
146 Which of the following is good nuclear fuel?

Ans : Plutonium-239
147 Which instrument instrument used for recording earthquake waves?

Ans : Seismograph
148 Who firstly demonstrated experimentally the existence of electromagnetic wave?

Ans : Hertz
149 Which is used as a coolant in nuclear reactors?

Ans : Liquid sodium
150 Meghnad Saha is known for his contribution in which field?

Ans : Physics

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