Kerala PSC Previous Years Question Paper & Answer

Title : SCIENTIFIC OFFICER (CHEMISTRY) -KERALA POLICE SERVICE (FORENSIC SCIENCE LABORATORY)
Question Code : A

Page:5


Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'SCIENTIFIC OFFICER (CHEMISTRY) -KERALA POLICE SERVICE (FORENSIC SCIENCE LABORATORY) ' And exam conducted in the year 2021. And Question paper code was '020/2021'. 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: 5 out of 16
Excerpt of Question Code: 020/2021

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For 1.00 1701637 KC\(aq) at 25 °C and 1 atm, the conductivity « is 0.115 ൨) ബേ.

Calculate their molar conductivity, A,, in ೧7 m? 17017,

(A) 115 (B) 0.115 (C) 0.0115 (D) 0.00115

Pick out the correct answer/s among the following statements :

(i) Addition of a solute at constant T and P to a solution containing solvent A
always decreases chemical potential [५५

(ii) The vapour pressure of a solution of A and B at temperature T is always less than
the vapour pressure of pure A at T.
(4) All of the above (i and ii) ‏رق‎ Only (i)
(C) Only (ii) (D) None of the above

Consider the following statements about the salt bridge :

(1) 1 enhances the rate of the reaction.

(1) ۲٢۲ can minimizes the junction potential.

(iii) It consists of an electrolyte in a gel.

The correct statement/s is/are
(ಹ) Only (i and iii) (B) All of the above (i, ii and iii)
(C) Only (iii) 0) Only (ii and iii)

The gas-phase reaction, 2NO,Cl -> 2NO, + Cl, has rate law in the form of r = k[NO,Cl].
The rate determining step consistent with this rate law is

(A) 28೦,೦1೨ 210, +Cl, ൫ ೫೦,೮೨ NO, +©
(0) 0, +© > ೫೦೮ (2) NO,C1+Cl>NO,+Cl,
Identify the correct product of the following reaction :
OH
2 NaNO,
^ HCL
t-Bu “வப
0 0
<
உப உம.
(A) 3 (B) பு

tBu

0
പം = ‏گی‎
‎t-Bu’ t-Bu

Consider the following reaction :

ஹ்‌ 18۴ ಹಾಟ ‏ہج‎
‎Br

Which options contain the statements of the above reaction is correct ?
(i) ‏اظ‎ reaction
(ii) 2 reaction
(iii) Major product is more substituted alkene.
(iv) Major product is less substituted alkene.
(A) Only (1& iii) (B) Only (ii & iii) (0 Only(i&iv) (D) Only (11 & iv)

t-Bu’

5 ह | ` 020202
[P.T.O.]

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