University: West Bengal University
Course: B.Sc Microbiology
Subject:Genetics
Year of Question Paper : 2013
CS/B.Sc (H)/BT/GEN/Micro. Bio./Mol. Bio./SEM-4/CH-401/2013
2013
CHEMISTRY
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following : [Marks 10 × 1 = 10]
i) Grignard reagent is used for preparation of
a) Alkanes b) Alkenes
c) Alkynes d) All of these.
ii) For a reaction catalyst changes
a) activation energy b) free energy
c) equilibrium constant d) none of these.
iii) Solubility of iodine in ethanol is
a) 15 ® C b) 18 ® C
c) 20 ® C d) 17 ® C.
iv) Each turn of a-helix contains
a) 3·6 amino acid b) 3·5 amino acid
c) 3·2 amino acid d) 3·3 amino acid.
v) Iodine is used to activate
a) Aluminium b) Magnesium
c) Titanium d) Sodium.
vi) 4-toluene sulphonyl chloride is used as a reagent in
a) Curtius rearrangement
b) Neber rearrangement
c) Lossen rearrangement
d) both (b) & (c).
vii) Pinacol-Pinacolone rearrangement converts
a) a germinal diol to a ketone
b) a vicinal diol to a ketone
c) a ketone to an amide
d) an alcohol to an olefin.
viii) Hoffman rearrangement is an example of migration to
a) electron deficient nitrogen
b) electron deficient carbon
c) electron deficient oxygen
d) none of these.
ix) Galactose is an epimer of
a) Mannose b) Glucose
c) Fructose d) Acarbose.
x) The unit of k in the first order reaction is
a) mole/L time
b) time- 1
c) L/mole-time.
xi) Colligative property depends on
a) chemical properties of solute
b) physical properties of the solute
c) concentration of the solute in bulk solution
d) all of these.
xii) Which organometallic compound is used as additive to
petrol ?
a) Tetramethyl zinc
b) Tetramethyl cadmium
c) Tetramethyl lead
d) Tetramethyl magnesium.
GROUP – B
( Short Answer Type Questions )
Answer any three of the following. [Marks 3 × 5 = 15]
2. What is activation energy ? It is essential for a catalyst to
decrease activation energy. Comment. [Marks 1 + 4]
3. Give an example each of a zero order reaction and a
fractional order reaction. Compare the time required for 20%
and 80% of a first order reaction. [Marks 2 + 3]
4. What is an active methylene group ? Give the mechanism
how active methylene group makes condensation reaction. [Marks 2 + 3]
5. Define half life. What are the half-lives of a zero order
reaction and a first order reaction ? [Marks 1 + 2 + 2]
6. Discuss any suitable method for the conversion of
aldopentose to aldohexose.
GROUP – C
( Long Answer Type Questions )
Answer any three of the following. [Marks 3 × 15 = 45]
7. Write about the chemical reactions of glucose. Discuss Ruff
degradation and its importance in chemistry. [Marks 10 + 5]
8. What is the process of production of iodine ? Write down
short note on the characteristics of iodine. [Marks 8 + 7]
9. Write down a short note on secondary structure of protein.
What is the difference between tertiary structure and
quaternary structure of protein. [Marks 10 + 5]
10. What happens when phenyl acetate is heated with
Anhydrous AlCl3 ? Write the name of the reaction. Write
with mechanism what product you will get when cis and
trans but-1,3-diene is treated with maleic acid. Give
synthetic use of HIO4 and PCl5
. Give the difference between
application of LiAlH4 and NaBH4 . [Marks ( 2 + 1 ) + ( 2 + 3 ) + 4 + 3]
11. What are oxidising and reducing sugars ? How do you
convert an aldose into ketose containing two additional
carbon atoms ? How do you convert aldopentose to
aldohexose ? What happens when glucose is subjected to
reacts with hydroiodic acid and red phosphorous at 100°C ?
How sorbitol can be synthesized from glucose ? [Marks 3 + 3 + 3 + 3 + 3]
12. What are poly phalide ions and polyhalides ? How are they
classified ? What are solvated polyhalides ? How are simple
and mixed polyhalides prepared ? Discuss the structure and
shape of trihalide anion and cation. [Marks ½ + ½ + 1 + 1 + 1 + 3 + 4 + 4]
13. Write an account of any three of the following : [Marks 3 × 5]
a) Fries rearrangement
b) Benzidene rearrangement
c) Dakine rearrangement
d) Cumene hydroperoxide rearrangement
e) Allylic rearrangement.
===========..
Course: B.Sc Microbiology
Subject:Genetics
Year of Question Paper : 2013
CS/B.Sc (H)/BT/GEN/Micro. Bio./Mol. Bio./SEM-4/CH-401/2013
2013
CHEMISTRY
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following : [Marks 10 × 1 = 10]
i) Grignard reagent is used for preparation of
a) Alkanes b) Alkenes
c) Alkynes d) All of these.
ii) For a reaction catalyst changes
a) activation energy b) free energy
c) equilibrium constant d) none of these.
iii) Solubility of iodine in ethanol is
a) 15 ® C b) 18 ® C
c) 20 ® C d) 17 ® C.
iv) Each turn of a-helix contains
a) 3·6 amino acid b) 3·5 amino acid
c) 3·2 amino acid d) 3·3 amino acid.
v) Iodine is used to activate
a) Aluminium b) Magnesium
c) Titanium d) Sodium.
vi) 4-toluene sulphonyl chloride is used as a reagent in
a) Curtius rearrangement
b) Neber rearrangement
c) Lossen rearrangement
d) both (b) & (c).
vii) Pinacol-Pinacolone rearrangement converts
a) a germinal diol to a ketone
b) a vicinal diol to a ketone
c) a ketone to an amide
d) an alcohol to an olefin.
viii) Hoffman rearrangement is an example of migration to
a) electron deficient nitrogen
b) electron deficient carbon
c) electron deficient oxygen
d) none of these.
ix) Galactose is an epimer of
a) Mannose b) Glucose
c) Fructose d) Acarbose.
x) The unit of k in the first order reaction is
a) mole/L time
b) time- 1
c) L/mole-time.
xi) Colligative property depends on
a) chemical properties of solute
b) physical properties of the solute
c) concentration of the solute in bulk solution
d) all of these.
xii) Which organometallic compound is used as additive to
petrol ?
a) Tetramethyl zinc
b) Tetramethyl cadmium
c) Tetramethyl lead
d) Tetramethyl magnesium.
GROUP – B
( Short Answer Type Questions )
Answer any three of the following. [Marks 3 × 5 = 15]
2. What is activation energy ? It is essential for a catalyst to
decrease activation energy. Comment. [Marks 1 + 4]
3. Give an example each of a zero order reaction and a
fractional order reaction. Compare the time required for 20%
and 80% of a first order reaction. [Marks 2 + 3]
4. What is an active methylene group ? Give the mechanism
how active methylene group makes condensation reaction. [Marks 2 + 3]
5. Define half life. What are the half-lives of a zero order
reaction and a first order reaction ? [Marks 1 + 2 + 2]
6. Discuss any suitable method for the conversion of
aldopentose to aldohexose.
GROUP – C
( Long Answer Type Questions )
Answer any three of the following. [Marks 3 × 15 = 45]
7. Write about the chemical reactions of glucose. Discuss Ruff
degradation and its importance in chemistry. [Marks 10 + 5]
8. What is the process of production of iodine ? Write down
short note on the characteristics of iodine. [Marks 8 + 7]
9. Write down a short note on secondary structure of protein.
What is the difference between tertiary structure and
quaternary structure of protein. [Marks 10 + 5]
10. What happens when phenyl acetate is heated with
Anhydrous AlCl3 ? Write the name of the reaction. Write
with mechanism what product you will get when cis and
trans but-1,3-diene is treated with maleic acid. Give
synthetic use of HIO4 and PCl5
. Give the difference between
application of LiAlH4 and NaBH4 . [Marks ( 2 + 1 ) + ( 2 + 3 ) + 4 + 3]
11. What are oxidising and reducing sugars ? How do you
convert an aldose into ketose containing two additional
carbon atoms ? How do you convert aldopentose to
aldohexose ? What happens when glucose is subjected to
reacts with hydroiodic acid and red phosphorous at 100°C ?
How sorbitol can be synthesized from glucose ? [Marks 3 + 3 + 3 + 3 + 3]
12. What are poly phalide ions and polyhalides ? How are they
classified ? What are solvated polyhalides ? How are simple
and mixed polyhalides prepared ? Discuss the structure and
shape of trihalide anion and cation. [Marks ½ + ½ + 1 + 1 + 1 + 3 + 4 + 4]
13. Write an account of any three of the following : [Marks 3 × 5]
a) Fries rearrangement
b) Benzidene rearrangement
c) Dakine rearrangement
d) Cumene hydroperoxide rearrangement
e) Allylic rearrangement.
===========..
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