Organic Chemistry Practice Test 10

1. Carbohydrates are polyhydroxy compounds of _______________

Glucose

Aldehyde and ketone

Oligosaccharides

Glyceraldehyde

2. Which of the following catalyst can be used in the synthesis of pyridine by Bönnemann cyclization?

Vanadium oxide

Silver or platinum-based catalyst

Nickel based catalyst

Cobalt catalyst

3. Which of the following copolymers is the copolymer with several polymer chains connected to a central core?

Statistical copolymer

Terepolymer copolymer

Graft copolymer

Star copolymer

4. A nucleotide is formed of which of the following units?

sugar and phosphate

nitrogen base and phosphate

nitrogen base, sugar and phosphate

nitrogen base and sugar

5. Macromolecules like Enzymes, vitamins and hormones can be classified into a single category of biological chemicals. Why?

all of these are exclusively synthesized in the body of a living organism as at present

all of these enhance oxidative metabolism

all of these are conjugated proteins

all of these help in regulating metabolism

6. Which of the following nitrogenous base is not present in RNA?

cytosine

guanine

thymine

adenine

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

Dealkylation of alkylpyridines

Bönnemann cyclization

Hantzsch pyridine synthesis

Chichibabin synthesis

8. What is the product when thiophene reacts with Br2 in benzene?

3-bromothiophene

2,5-dibromothiophene

2-bromothiophene

3,4-dibromothiophene

9. Which of the following olefine undergo coordination polymerisation in the presence of Ziegler-Natta catalysts?

vinyl chloride

ethylene

acrylate esters

vinyl ethers

10. Which of the following is true about homogenous Ziegler Natta polymerisation?

This is based on Kaminsky catalyst

This is based on titanium tetrachloride organoaluminium co-catalyst

This is based on neodymium-based catalyst

This is based on organoaluminium co-catalyst