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IAS/IPS Prelims Chemistry - General Knowledge Questions and Answers for UPSC Exam | Page-7

61 ‘Yellow cake’, an item of smuggling across border is
A A crude form of cocaine
B A crude form of heroin
C Uranium oxide
D Unrefined gold

Answer: Option [C]
62 Which one of the following is not an essential micronutrient for plants ?
A Zinc
B Copper
C Boron
D Sodium

Answer: Option [D]


63 Which one of the following polymers is widely used for making bullet proof material ?
A Polycarbonates
B Polyethylene
C Polyamides
D Polyvinyl chloride

Answer: Option [A]
64 The characteristic odour of garlic is due to
A a chloro compound
B a sulphur compound
C a fluorine compound
D acetic acid

Answer: Option [B]
65 Which of the following substances are found in the beach sands of many parts of Kerala ?
I. Ilmenite
II. Zirecon
III. Sillimanite
IV. Tungsten

Select correct answer using the codes given below:

A I, II, III and IV
B I, II and III only
C III and IV only
D I and II

Answer: Option [B]
66 With reference to ‘fly ash’ produced by the power plants using coal as fuel, which of the following statements is/are correct ?
I. Fly ash can be used in the production of bricks for building construction.
II. Fly ash can be used as a replacement for some of the Portland cement concrete.
III. Fly ash is made up of silicon dioxide and calcium oxide only, and does not contain any toxic elements.

Select the correct answer using the code given below.

A I and II
B II only
C I and III
D III only

Answer: Option [A]
67 With reference to ionic compounds, consider the following statement:
I. Ionic compounds are insoluble in alcohol
II. Ionic compounds in the solid state are good conductor of electricity

Which of these statements is/are correct ?

A I only
B II only
C Both I and II
D Neither I nor II

Answer: Option [A]
68 Which one of the following is also called Stranger Gas ?
A Argon
B Neon
C Xenon
D Nitrous oxide

Answer: Option [C]
69 Which of the following is/are the example /examples of chemical change ?
I. Crystallization of sodium chloride
II. Melting of ice
III. Souring of milk

Select the correct answer using the code given below.

A I and II only
B III only
C I, II and III
D None

Answer: Option [B]
70 Cobalt-60 is commonly used in radiation therapy because it emits
A gamma rays
B alpha rays
C beta rays
D X-rays

Answer: Option [A]


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