UPSC EPFO SOLVED PAPER 2017

Total Questions: 120

91. Statement I The force on Moon due to Earth is the action, while the force on Earth due to Moon is the reaction.

Statement II To every action, there is an equal and opposite reaction.

Correct Answer: (a) Both the Statements are individually true and Statement II is the correct explanation of Statement I
Solution:

The gravitational force of earth is more than gravitational force of moon. So earth exerts a force on a moon.
From the Newton’s Third Law, force due to earth on moon is action, then force due to moon on earth will be reaction.

92. Statement I It is a common observation that if we place a glass of ice-water on a table at room temperate, the ice-water will get warmer.

Correct Answer: (a) Both the Statements are individually true and Statement II is the correct explanation of Statement I
Solution:

If we place a glass of ice-water on a table at room temperature the ice-water will get warmer, because, heat is energy that flows between a system and is environment because of temperature difference between them.

93. Which one of the following materials is not diamagnetic at Standard Temperature and Pressure (STP)?

Correct Answer: (d) Iron
Solution:

Iron is not a diamagnetic substances at Standard Temperature and Pressure (STP). While nitrogen sodium chloride and Water are diamagnetic substance.
Same substance, when placed in a magnetic field, are feebly magnetised opposite to the direction of the magnetised field. When brought close a pole of a away magnet, they are somewhat repelled away from the magnet. These substances are called ‘dimagnatic substances’.

94. Which one of the following gases has the highest solubility in water?

Correct Answer: (b) Ammonia
Solution:

Ammonia gases has the highest solubility in water.

95. Bleaching powder contains

Correct Answer: (c) Chlorine
Solution:

Bleaching powder contains chlorine.

96. What is the causal agent of Chikungunya?

Correct Answer: (c) Virus
Solution:

Virus is the causal agent of chikungunya.

97. Bio-remediation is a technology which is being extensively utilzed in controlling

Correct Answer: (d) Heavy metal pollutions
Solution:

Bio-remediation is a technology. Heavy metal pollutions is being extensively utilised in controlling.

98. Beauty of some historical monuments is greatly affected by the growth of certain living organisms. There living organisms belong to which one of the following groups?

Correct Answer: (b) Lichens
Solution:

Beauty of some historical monuments is greatly affected by the growth of certain living organisms. These living organisms belong to Lichens.

99. Which one of the following has the characteristics of both an animal as well as a plant?

Correct Answer: (d) Euglena
Solution:

Euglena has the characteristics of both an animal as well as a plant.

100. In order to save the stored food grains from insects, farmers usually mix with them

Correct Answer: (a) Neem leaves
Solution:

In order to save the stored food grains from insects, farmers usually mix with Neem leaves.