Kerala PSC Previous Years Question Paper & Answer
Page:10
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Scientific Assistant' And exam conducted in the year 2023. And Question paper code was '079/2023/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.
microscopy (STM)?
A:-The working principle is quantum tunneling.
B:-An image is formed due to variation in tunneling current as the tip moves
across the surface.
C:-The tunneling current exponentially depends on the distance from the probe
to surface
D:-The tunneling current is independent on the distance from the probe to
surface
Correct Answer:- Option-D
Question48:-Pick out the selection rules that govern hyperfine transition in ESR
spectra
A:-Am.=0 and Am,=+1
B:-Am.=0 and Am,=0
C:-Am.=41 and Am,=0
D:-Am.=+1 and Am,=+1
Correct Answer:- Option-C
Question49:-Assuming as isotropic system, the hyper fine ESR spectrum of an
aqueous solution of ८५२+ consists of a (“cu,r=3)
A:-Singlet
B:-Doublet
C:-Triplet
D:-Quartet
Correct Answer:- Option-D
Question50:-DPPH (a, a' - diphenyl picryl hydrazil radical) can be used for
calibrating the ESR spectra. The ESR spectrum of DPPH consists of
A:-quartet with intensity ratio 1:3:3:1
B:-quintet with intensity ratio 1:2:3:2:1
C:-quintet with intensity ratio 1:4:6:4:1
D:-quartet with equal intensity
Correct Answer:- Option-B
Question51:-Thermomechanical Analysis can be used for the determination
(|) Viscoelastic properties
(11) Glass transition temperature
(Ill) Phase transformation
A:-Only (1)
B:-Only (II) and (III)
C:-All of the above
D:-None of these
Correct Answer:- Option-C