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Subject: Chemistry, asked on 5/3/13

What happens when D Glucose is treated with HNO3

Subject: Chemistry, asked on 21/8/12

what is sugar moiety

Subject: Chemistry, asked on 24/11/10

can u  explain carbohydrates and how many types of carbohydrates and also the epimer term plz ?

Subject: Chemistry, asked on 7/2/12

what is mutarotation?

Subject: Chemistry, asked on 24/12/11

 why glucose doesnot react with schiff's reagent and 2,4 DNP though it has -CHO (Aldehyde) group?

Subject: Chemistry, asked on 26/7/12

 WHY SUCROSE DOES NOT FORM OSAZONE?

Subject: Chemistry, asked on 19/11/11

Where does the water present in the egg go after boiling the egg?

Subject: Chemistry, asked on 5/10/12

WHAT ARE THE EXPECTED PRODUCTS OF HYDROLYSIS OF LACTOSE????

Subject: Chemistry, asked on 15/3/15

What is the difference between acidic and basic amino acids?

Subject: Chemistry, asked on 18/2/13

 why do amino acids have high melting point and are soluble in water ?

Subject: Chemistry, asked on 1/10/11

please draw the currect sucrose structure.

Subject: Chemistry, asked on 1/11/14

distinguish between glucose and fructose using chemical tests

Subject: Chemistry, asked on 29/1/14

name the products obtained on complete hydrolysis of DNA

Subject: Chemistry, asked on 27/2/13

Unit 14 Biomolecules (4 marks)

1. How are carbohydrates classified on the basis of their behaviour on hydrolysis?
2. What are reducing and non reducing sugars?
3. Write the reactions when D-Glucose reacts with following: (a) ConcHNO3 (b) HI (c)
Bromine
4. Enumerate the reactions of D-Glucose which cannot be explained by its open chain
structure.
5. How do you explain the absence of aldehyde group in the pentaacetate of D-glucose?
6. Explain the pyranose structure of Glucose
7. Explain the structure of Glucose , Fructose ,Sucrose, Maltose, Lactose
8. What are the expected products of hydrolysis of Glucose , Fructose ,Sucrose, Maltose, Lactose
9. What do you understand by the term Anomers ,glycosidic linkage & Invert sugar?
10.What is the basic structural difference between starch and cellulose?
11.Write two main functions of carbohydrates in plants.
12.What is glycogen? How is it different from starch?
13. What are essential and non essential amino acids? Give two examples of each type.
14. Write a note on zwitter ion, Peptide linkage & Poly Peptide linkage
15.Distinguish between the following: (a) Fibrous &Globular proteins(b) -helix and -sheet
proteins
16. Write a note on: (a)Denaturation of proteins (b)Primary structure of proteins
17. Define vitamins. How are vitamins classified?
18.Name the deficiency diseases caused & main sources of A, C, D E, B1, B2,, B6 , B12 E &K.
19.Except for vitamin B12, all other vitamins of group B, should be supplied regularly in diet. Why?
20.Why cannot Vitamin C be stored in our body?
21.Define Hormones.
22.Define Enzymes. Explain the mechanism of Enzyme action
23.Define Nucleic acids. How are they classified? Mention their two important sources.
24. Write the important differences between DNA and RNA.
25. What is the difference between a nucleoside and a nucleotide?
26.What are different types of RNA found in the cell?
27. Give the important functions & Source of following Hormones:
(a) Testosterone(androgens)
(b) Estrogens & Progesterone
(c) Cortisone
(d) Oxytocin
(e) Insulin
(f) Angiotensin
(g) Adrenaline
(h) ThyroxineKalra1977@gmail.com Mahendra Kalra 0074959362719 +919462305605
Unit 15 Polymers (3 marks)
1. Define the term monomer, polymer and polymerization.
2. Explain with suitable examples how polymers are classified on the basis of molecular forces.
3. Give difference between the following:
(a) Thermoplastic polymers. & Thermosetting polymer
(b) Homopolymers and copolymer
(c) Addition & Condensation Polymerization
(d)Linear, Branched & Cross linked polymers
(e)Natural, semisynthetic & synthetic polymers
(f) Chain growth &step growth polymerization
(g)Low Density Polythene & High Density Polythene
4. Write the name and structure of one of the common initiators used in free radical
polymerization .
5. Write the structure of monomer and polymer of (a) Polythene (b) Teflon
(c)Polypropene (d) Polystyrene (e) PVC (f) Polyacrylonitrile (Orlon)
6. Write the structure of monomer and polymer of Polybutadiene, Natural rubber & Neoprene.
7. Discuss the main purpose of vulcanization of rubber.
8. Explain the difference between Buna-S and Buna-N.
9. Write the structure of monomer and polymer of (a)Nylon 6, 6 (b)Nylon6.(c) Dacron
(Terylene) (d)Glyptal.
10. What does the 6,6 means in Nylon 6, 6.
11.Write the structure of monomer and polymer of (a) Bakelite (b) Melamine-Formaldehyde
polymer (c) Urea- Formaldehyde polymer.
16. What do you by Biodegradable polymers? Write the structure of monomer and polymer of PHBV.
17. Explain the term copolymerization and give two examples.
18. Give at least two uses of: polythene, Teflon, Polypropene, Polystyrene, PVC Polyacrylonitrile,
Natural rubber,Neoprene , Buna-S , Buna-N, Nylon 66,Nylon 6,Dacron, Glyptal, Bakelite
Melamine-Formaldehyde polymer, PHBV , Urea-Formaldehyde polymer.
Unit 16 CHEMISTRY IN EVERYDAY LIFE (3 marks)
1. Define the following with examples: chemotherapy Analgesics (Narcotics & Non narcotics
) , Antipyretic Tranquilizers, Antimicrobials Antiseptics, Disinfectants Antibiotic (Braod
& narrow spectrum antibiotic) Antihistamines, Antacids, Antifertility drugs.
2. Define the following terms giving suitable examples: Artificial sweetening agents, Food
Preservatives, Antioxidants
3. Explain the following Detergents with suitable examples: Soap,Detergents Cationic
detergents, Anionic detergents, Non-ionic detergents
4. What may be added to soap to improve its antiseptic properties.
5. What are the Constituents of dettol?
6. What is tincture of iodine? What is its use?
7. Why is the use of aspartame limited to cold drinks and foods?
8. Why do we required artifical sweetening agent?
9. What problem arises in using alitame as artificial sweetener?
10.Why soaps do not works in hard water.Can you use soaps and synthetic detergents to check the
hardness of water?
11. Synthetic detergents are preferred to soaps in washing machines.State reason.
12.What are biodegradable and non-biodegradable detergents? Give one example of each.

Subject: Chemistry, asked on 30/10/13

Sucrose dosent give positive test with Tollens reagent. Why ?

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