IAS/IPS Prelims Chemistry - General Knowledge Questions and Answers for UPSC Exam | Page-8
Questions
71
Which one of the following elements is essential for the construction of nuclear reactors ?
Answer: Option [B]
72
“The final Agent Orange raid in Vietnam took place in 1970- areas have begun to bloom again. But 19 years after the war`s end, it seems plain that Agent Orange is killing and maiming human beings, something it never intended to do. The apparent toxic fallout from those clouds is a crop of human miseries. Including cancers, miscarriages and birth defects that may persist for decades.”
The offensive substance referred to in this quotation is:
Answer: Option [D]
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73
Consider the following:
I. Oxides of Hydrogen
II. Oxides of Nitrogen
III. Oxides of Sulphur
Which of the above causes/ cause acid rain ?
Answer: Option [C]
74
Consider the following:
I. Carbon dioxide
II. Oxides of nitrogen
III. Oxides of sulphur
Which of the above is/are the emission /emissions from coal combustion at thermal power plants ?
Answer: Option [D]
75
What is the role of ultraviolet (UV) radiation in the water purification systems ?
I. It inactivates/kills the harmfull microorganisms in water.
II. It removes all the undersirable odours from the water.
III. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water
Which of the statements given above is/are correct ?
Answer: Option [A]
76
The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is
I. to keep the washing powder dry
II. to maintain the alkalinity of the powder
Which of these statements is /are correct ?
Answer: Option [C]
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