Organic Chemistry Mock Test 10

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Question 1 of 10

1. Which of the following happens in termination step of the free radical polymerisation?

addition of monomer molecules to the growing chains

disproportionation

addition of free radical to monomer

decomposition of initiator

Question 1 of 10

Question 2 of 10

2. What is the name reaction of the following reaction?

Bönnemann cyclization

Kröhnke pyridine synthesis

Chichibabin synthesis

Ciamician–Dennstedt rearrangement

Question 2 of 10

Question 3 of 10

3. What is the name reaction of the following reaction?

Hantzsch pyridine synthesis

Chichibabin synthesis

Bönnemann cyclization

Dealkylation of alkylpyridines

Question 3 of 10

Question 4 of 10

4. Pyridine undergoes nucleophilic substitution with phenyl lithium at 100℃ to give which of the following?

2,5-diaphenylpyridine

3,5-diphenylpyridine

3-phenylpyridine

2-phenylpyridine

Question 4 of 10

Question 5 of 10

5. Which of the following copolymers is the copolymer in which the main chain is formed from one type of monomer A and branches are formed from another monomer B?

Statistical copolymer

Star copolymer

Graft copolymer

Terepolymer copolymer

Question 5 of 10

Question 6 of 10

6. How many number of resonating structure stabilises a pyridine molecule?

Question 6 of 10

Question 7 of 10

7. Which catalyst is used for the coordination polymerisation of polybutadiene?

neodymium-based catalyst

kaminsky catalyst

titanium tetrachloride organo-aluminium co-catalyst

organo-aluminium co-catalyst

Question 7 of 10

Question 8 of 10

8. To which of the following does guanine form hydrogen bonds in DNA?

adenine

cytosine

guanine

thymine

Question 8 of 10

Question 9 of 10

9. Mycobacterium tuberculosis and Escherichia coli produce nicotinic acid by condensation of which of the following compounds?

Glyceraldehyde 3-phosphate

Tryptophan

Pyrrole

Kynurenine

Question 9 of 10

Question 10 of 10

10. Which of the following is true about Step-growth polymerisation?

monomers react by eliminating small molecules like H₂O, NH₃, CH₂O and NaCl in a repetitive manner, Indefinite growth of the polymer occurs at both ends

polymerization that is catalysed by transition metal salts and complexes

monomers react to form first dimers, then trimmers, longer oligomers and eventually long chain polymers

radical, coordination, anionic, or cationic polymerization, depending on the type of initiation

Question 10 of 10