Kerala PSC Previous Years Question Paper & Answer

Title : Scientific Officer - Chemical Examiners Laboratory
Question Code : A

Page:4


Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Scientific Officer - Chemical Examiners Laboratory' And exam conducted in the year 2021. And Question paper code was '040/2021'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. 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.

page: 4 out of 16
Excerpt of Question Code: 040/2021

040/21

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The molar conductivities at infinite dilution of NaCl, Nal and Rbl are 12.7, 10.8 and
9.1 mS m? mot respectively. The molar conductivity at infinite dilution of RCI is
A) 22 mS m? mor! 8) 33 നടന mor!

©) 11 mS m? mort 0) 44 നടന്ന്‌ mor"!

The ground state term symbol of Nb (2 = 41) is 60. The electronic configuration
corresponding to this term symbol is
A) [014051 8) [11403562 ©) (41465560 0) [414035515೧1

For an electron in a three dimensional rectangular box of dimensions Lx = 1 x 10-15 m,
Ly = 1.5 x 10-15 m, Lz = 2x 10-15 m. Calculate the zero point energy.
A) 2.01 x 1073 8) 1.01x10-7J 0) 3.01 41074 0) 4.01% 10-73

In the IR spectrum of cyclohexanone, the carbonyl absorption band appears at
A) 1760 ണേ! 8) 171501 ௦) 1670 ‏۴۲ء‎ 0) 1700 ന്നോ!

Calculate the angle at which first order reflection will occur in an X-ray spectrophotometer
when X-rays of wavelength 1.54 A are diffracted by the atoms of the crystal, given
that the inter planar distance is 4.04 A.
A) 22° B) 14° C) 27° D) 11°

For the deposition of Pb by electroplating which is the most suitable compound among
the following
A) PbSO, 8) ലവം ௦) ലാലും D) Pb(Et),

Total number of hyperfine EPR lines for octahedral high spin Mn (Il) complexes
(I = 5/2 for Mn) is
A) 30 B) 36 C) 24 D) 33

No. of signals expected in the CNMR spectrum of anthracene is
A) 8 B) 6 04 0) 2

During addition of polymerization, the reaction proceeds via
A) Step growth process B) Free radical chain reaction
C) Addition reaction D) Cascade process

Which of the following will not result in deviation from Beer’s Law ?
A) Change in refractive index of the medium

B) Dissociation of the analyte on dilution

C) Polychromatic light

D) Path length of cuvette

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