Kerala PSC Previous Years Question Paper & Answer

Title : CHEMICAL ASSISTANT GROUND WATER DEPARTMENT
Question Code : A

Page:13


Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'CHEMICAL ASSISTANT GROUND WATER DEPARTMENT' And exam conducted in the year 2019. And Question paper code was '022/2019'. 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: 13 out of 16
Excerpt of Question Code: 022/2019

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Choose the correct sentence(s) regarding accuracy and precision.

() A precise value shows the agreement between several experiments.

(7) The precise value must be in agreement with true value.

(I) Standard deviation is used to express the accuracy of experiments.

(IV) Error distribution curves for a more accurate set of results is in close proximity to
the true value.

(^) All the statements are correct

(B) Statements (I) and (IV) are correct

(C) Statements (I) and (0 are correct

(D) Statements (7) ೩೧6 (717) ೫೮ ೦೦೫೯೦೦೬

The sharp band at wavelength 528 nm in the UV - Vis absorption spectra of KMnO,
can be attributed to :

(A) LMCT transition (8) d-d transition

(9) MILCT transition (D) Jahn-Teller distortion

The correct order of decreasing vibrational frequency for C-Cl, C-C, C-Br, C-H ஊம்‌
CQis:

(ಹ) ೮-೫, ೮-೮೮ C-0, C-H, C-C ‏جس ,می ہم‎ C-Br, CCl, C-C

(C) CCl, C-Br, C-0, C-C, C-H (D) C-H, C-C, ௨-௦, ௪3 C-Br

In the mass spectrum of CH,Cl,, a group of three peaks at m/z = 84, 86 and 88 in a ratio
9:6:1 are assigned to the parent ion. These peaks are due to :

(മ) The two Cl atoms are cleaved easily

(B) The hydrogens can be cleaved easily

(ಲ) Clhas two isotopes

(D) (l has three isotopes

A "H-NMR spectrum of compound contains a singlet, a triplet and a quartet peaks.
Choose the possible compound from the following :

(^) CH,CH,CH,CHCl, (೫) CH,CCLCH,CH,
ര CH,CH,CHCICHCI, (D) CH,CHCICHCICH,

Which of the following statement(s) is true for condensation polymers ?
0 Polymer structure contains only C-C bonds

(7) Monomers used can be bifunctional or polyfunctional

യ A small by-product molecule is eliminated

(മ) All are correct (3) Only (II) is correct
(ಲ) (D and (O0) are correct (D) (2 ೫೫೮ (1) ೩೯೮ correct
Which of the following is an auxochrome ?
(ಹ) -OH ൫ -NO, (© -N=N- യു കടാ
13 22/2019

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