Chitin & Chitosan

1. 1.Which one is not correct?

• Chitosan is heteropolymer.

• Chitosan dissolves in acidic solution.

• Chitosan is the N-acetylated derivative of chitin.

• Chitin is 2-acetamido-2-deoxy-α-D-glucose

2. 2.Which one is not the source of chitin?

• shrimp

• mushroom

• crab

• none of these

3. 3.Which one is not correct?

• 100%N-acetylated chitin is called as chitan.

• Chitin has sheet morphology.

• Chitin has β-1,4 linkage.

• Chitin has 3 polymorphic forms.

4. 4.Which one is not property of chitosan?

• Antibacterial

• Biocompatibility

• Soluble in water

• Hemostatic

5.Which one is correct?

• α & β-chitin has antiparallel stack structure.

• γ-chitin has parallel stack structure.

• β-chitin has parallel stack structure.

• β-chitin is analogous to cellulose II.

6.Which one is not step for production of chitosan?

• hydrolysis

• delignification

• demineralization

• deproteinization

7.Which one is not property of chitin?

• low crystalline material

• non-toxicity

• insoluble material

• biodegradability

8.Which one is not correct?

• H-bonding in α-chitin is high.

• H-bonding in α-chitin is low.

• H-bonding results in insolubility in organic solvent.

• α-chitin is almost found in shrimp shell.

9.Which one is not application of chitosan?

• Cosmetics

• wound dressing

• waste water treatment

• none of these

10.Which one is not correct?

• Chitin from diatom has 100% poly-N-acetylglucosamine.

• The solubility depends on degree of N-acetylation.

• Degree of N-acetylation is ratio of glucosamine to N-acetyl glucosamine.

• Chitosan acts as cationic polyelectrolyte.