Kerala PSC Previous Years Question Paper & Answer
Page:6
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Lecturer in Polymer Technology (Polytechnics)' And exam conducted in the year 2023. And Question paper code was '120/2023/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.
D:-Both 1 and 2
Correct Answer:- Option-D
Question29:-The difficulty in dissolving cellulose in water, in spite of too many OH
groups in it, is because of
A:-Entanglements between the chains
B:-Cross linking
C:-Hydrogen bonding
D:-Very high molecular weight
Correct Answer:- Option-C
Question30:-lf Tg of a polymer is close to ambient temperatures but melting point
is high (i.e. more than 3/2 of its Tg), it means that the polymer is
A:-a rubber
B:-amorphous plastic
C:-thermoset
D:-crystalline and fibre
Correct Answer:- Option-D
Question31:-The difficulty in getting a fluorocarbon rubber based on homopolymers
is due to
A:-High polarity of the F atom
B:-High electronegativity of F atom
C:-Crystallization tendency of the resulting polymer
D:-Hydrogen bonding
Correct Answer:- Option-C
Question32:-Which rubber is prepared from another polymer?
A:-CR
B:-SBR
C:-CSM
D:-ACM
Correct Answer:- Option-C
Question33:-A polymer which cannot be cross linked is
A:-PE
B:-Poly isobutylene
C:-IIR
D:-EPM
Correct Answer:- Option-B
Question34:-Chlorination of Natural rubber involves
A:-Free radicals