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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Research Officer- Chemistry/ Biochemistry' And exam conducted in the year 2023. And Question paper code was '027/2023/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.
upon colomn's dimension as well as the phase properties
C. Electrospray ionisation method in LC-MS can be used for highly polar, highly
stable or thermally stable compounds
D. Carrier gas used in GC-MS are nitrogen helium argon and Hydrogen
A:-A and B are wrong
B:-B and C are wrong
C:-C and D are wrong
D:-A and D are wrong
Correct Answer:- Option-B
Question80:-Crypton is a natural terpenoid which
A:-Contains ten carbon atom and does not obey isoprene rule
B:-Contains eight carbon atom and obeys isoprene rule
C:-Contains eight carbon atom and does not obey isoprene rule
D:-Contains nine carbon atom and does not obey isoprene rule
Correct Answer:- Option-D
Question81:-Which among the following is the function of Chopper in AAS?
A:-To split the beam into two
B:-To filter impurities
C:-To convert steady light into pulsating light
D:-To reduce the sample into atomic sate
Correct Answer:- Option-C
Question82:-A 725\10-°M solution of potassium permanganate has a transmittance of
20% when measured in a 2.10 cm cell at a wavelength of 525nm. The molar
absorptivity of potassium permangnate solution i$ fmoi-tcm-1
८0; -0.0459..10-5
B:-4.59x10-3
C:-o.459x10-5
D:-45.9x107
Correct Answer:- Option-B
Question83:-If DTA of cac,0,#,0 is carried out in an inert atmosphere, the number of
exothermic peaks are
A:-0
B:-1
C:-2
D:-3
Correct Answer:- Option-A