IAS/IPS Prelims Chemistry - General Knowledge Questions and Answers for UPSC Exam | Page-4
Questions
31
Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not ?
Answer: Option [D]
32
Regarding the atom of a chemical elements, the magnetic quantum number refers to
Answer: Option [D]
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33
Salts of which of the following elements provide colours to fireworks ?
Answer: Option [A]
34
Which one among the following is called philosopher’s wool ?
Answer: Option [B]
35
Consider the following statements about acetylene:
I. It is used in welding industry
II. It is a raw material for preparing plastics
III. It is easily obtained by mixing silicon carbide and water of these statements
Answer: Option [A]
36
Physico-chemical characteristics of water in water sources undergo changes due to
Answer: Option [B]
37
Consider the following statements:
I. Liquefied natural gas (LNG) is liquefied under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels.
II. First LNG terminal in India was built in Hassan.
III. Natural gas liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline.
Which of the statements given above is /are correct?
Answer: Option [B]
38
Which one of the following was used as a chemical weapon in the first world war ?
Answer: Option [C]
39
Consider the following statements with reference to the periodic table of chemical elements:
I. Ionisation potential gradually decreases along a period
II. In a group of elements, electron affinity decreases as the atomic weight increases
III. In a given period, electronegativity decreases the atomic number increases
Which of these statements (S) is / are correct ?
Answer: Option [B]
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