Kerala PSC Previous Years Question Paper & Answer
Page:4
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Higher Secondary School Teacher (Junior) Chemistry' And exam conducted in the year 2023. And Question paper code was '033/2023/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.
B:-Two doublets and one triplet
C:-Two doublets and two triplets
D:-One singlet and two triplets
Correct Answer:- Option-C
Question17:-Calculate the binding energy per nucleon of oxygen atom ,o® which
has a mass of 15.9949910 amu. [Mass of neutron = 1.008665 amu, mass of proton
= 1.007277 amu, mass of electron = 0.0005486]
A:-7.976 MeV
B:-7.0747 MeV
C:-8.5701 Mev
D:-343.816 Mev
Correct Answer:- Option-A
Question18:-When nucleus of medium or high mass number interacts with
projectiles of high energy, a violent rupture leads to the formation of two extremely
unstable nuclei, one light and one heavy, having the same N/Z ratio as the targest
nucleus. The phenomenon is called
A:-Spallation
B:-Evaporation
C:-Fission
D:-Fragmentation
Correct Answer:- Option-D
Question19:-The number of effective atoms per unit cell in a simple cubic, face
centred cubic and body centred cubic are respectively
A:-4,1, 2
B:-1, 4, 2
C:-2,4,1
D:-4, 8,2
Correct Answer:- Option-B
Question20:-In Zinc blende structure, zinc atoms fill up
A:-All octahedral holes
B:-All tetrahedral holes
C:-Half number of octahedral holes
D:-Half number of tetrahedral holes
Correct Answer:- Option-D
Question21:-If a non metal is added to the interstitial sites of a metal, then the
metal becomes
A:-Softer
B:-Less tensile