Kerala PSC Previous Years Question Paper & Answer
Page:12
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name ' Junior Research Officer (SR for ST)' And exam conducted in the year 2023. And Question paper code was '137/2023/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.
D:-Benzoin condensation
Correct Answer:- Option-D
Question47:-The catalyst for Suzuki coupling is
A:-Nickel(0) complex
B:-Nickel (Il) complex
C:-Palladium (0) complex
D:-Platinum (0) complex
Correct Answer:- Option-C
Question48:-Lithium dialkyl cuprate is known as
A:-Grignard reagent
B:-Frankland reagent
C:-Gilman reagent
D:-Adam's catalyst
Correct Answer:- Option-C
Question49:-Which is the protecting group used for amino protection in peptide
synthesis?
A:-Benzyloxycarbonyl
B:-t-butoxycarbonyl
C:-9-Fluorenylmethoxycarbonyl
D:-All the above
Correct Answer:- Option-D
Question50:-Which among the following is not using as phase transfer catalyst?
A:-Organic phosphonium salts
B:-Crown ethers
C:-Quaternary ammonium salts
D:-None of the above
Correct Answer:- Option-D
Question51:-Which among the following is a cause of high quantum yield of
photochemical reactions
A:-Deactivation of reacting molecules
B:-Occurrence of reverse of primary reaction
C:-Occurrence of chain reaction per photon absorption
D:-None of the above
Correct Answer:- Option-C
Question52:-What is the product of photoreaction of 1,3-butadiene?