Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name ' Junior Research Officer (SR for ST)' And exam conducted in the year 2023. And Question paper code was '137/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
Question96:-An example for piezoelectric material is
A:-Barium titanate
B:-lron-Aluminium alloy
C:-Gallium nitride
D:-Lead telluride
Correct Answer:- Option-A
Question97:-The chemical species responsible for the ozone layer depletion is
A:-Fullerene
B:-Ferrocene
C:-DDT
D:-Freon
Correct Answer:- Option-D
Question98:-Which of the following synthetic method is a bottom-up approach for
the synthesis of nanomaterials?
A:-Ball-milling
B:-Electron beam lithography
C:-Sol-gel synthesis
D:-None of these
Correct Answer:- Option-C
Question99:-The first talk on nanotechnology entitled 'There is plenty of room at the
bottom in 1959 was delivered by
A:-V Vogel
B:-S J Fonash
C:-K E Drexler
D:-Richard Feynman
Correct Answer:- Option-D
Question100:-The repeating unit in the structure of 18-crown-6 is
At--N-CH)-CH9-
B:--S-CH,)-CH)-
C:--0-CH2-CH2-
D:--cH)-CH-
Correct Answer:- Option-C