chemistry 5th semester question paper for bsc examination, download bsc question paper, Assam University question paper download.
chemistry 5th semester question paper for bsc examination, Assam university question paper
UNIT I
UNIT I
1) define of hybridization. [2015]
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3) state Fajan's rule. [2015, 2016, 2012 AU]
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5) explain resonance. [2015, 2012, 2016 AU]
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8) explain polarisation of ion. [2014 AU]
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2) sp, sp3, dsp3, d2sp3 hybridization determine its angle. [2015, 2016 AU]
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4) draw the potential energy curve for hydrogen molecule. [2016 AU]
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6) Draw the resonance structure of CO3 2-ve and NO3 -ve[2012, 2016 AU]
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7) Use Fajans rule to predict the salt having lower melting point from among Ki and Cul. [2012 AU]
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9) Between LiCl and LiF which has higher boiling point, Justify your answer w.r.t. Fajan's rule. [2015 AU]
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10) Explain the Fajan's rule for transition of ionic bond to covelent bond. [2016 AU]
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UNIT II
11) Differentiate between bonding MO and antibonding MO. [2016, 2012 AU]
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12) How do you express bond strength in term of bond order? [2016 AU]
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13) Draw a MO energy level diagram for a)CO molecule b)NO molecule. [2016 AU]
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14) with the help of MOT, a)show that helium molecule does not exsist. b) Explain why N2 +ve has smaller dissociation energy N2. c)show that He2 +ve exists. [2016, 2014 AU]
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15) write the megnetic properties of N2 +ve. [2016 AU]
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16) between H2 +ve and H2 -ve which one is more stable and why. [2016 AU]
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17) write the MO electronic configuration of a)NO molecule b)O2 +ve, O2 -ve, and O2. [2016, 2014, 2012 AU]
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18) Write the bond order of a)H2, H2 +ve, H2 -ve. b)O2 +ve, O2 -ve, and O2. [2014 AU]
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UNIT III
19) Define Van dar waal's forces. [2012]
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24) Define hydrogen bond. [2015 AU]
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25) Explain the type of hydrogen bond with suitable example. [2015 AU]
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20) define crystal lattice and unit cell. [2014, 2012 AU]
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21) Define weak interactions. [2014 AU]
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22) Explain different types of van dar waal's interaction with suitable example. [2014 AU]
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23) Calculate the number of atoms per unit cell of b.c.c. lattice. [2014 AU]
Ans:- 2 atom/unit cell
26) Calculate the number of atom present per unit cell of f.c.c. lattice. [2015 AU]
Ans:- 4 atom/unit cell
27) how will you distinguish between hexagonal close packing and cubic close packing. [2016 AU]
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UNIT IV
Ans:-
30) Explain the principle and write the reaction involved in the estimation of Fe 3+ve ion by
a)K2Cr2O7 b)KMnO4. [2014, 2016 AU]
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31) write the reaction involved in the estimation of cupper 2+ve using the sodium thiosulphate. [2014 AU]
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32) Explain iodometric estimation. [2016 AU]
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UNIT V
33) taking a suitable example write the mechanism of mannich reaction. [2012 AU]
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34) Write a short note on wittig reaction. [2014 AU]
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35) what is mannich base. Explain manich reaction with suitable example. [2014 AU]
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36) Describe briefly the Michael reaction. [2014 AU]
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37) Write the reagent used in the Meerwein-Pondrof-Verley reduction and also write the utility of this. [2015 AU]
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38)
34) what happen when pyrrole is treated with a)bromine in alcohol. b)Choloroform and alkali [2012 AU]
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35) what happen when furan is treated react with a mixture of HCN and HCl. [2012 AU]
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36) Write one method of preparation of each of pyrrol and furan. [2014 AU]
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37) Electrophilic substitution of furan cannot be carried out in strongly acidic medium. Explain.[2014 AU]
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38) Explain why pyrrole, furan, and theiophene are called the superaromatic. [2016 AU]
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39) what happen when mixture of furan, ammonia and steam passed over heated alumina. [2015 AU]
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40) write an method of synthesis of thiophene. [2015 AU]
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41) what happen when a)pyrrole is teated with Zn in presence of acetic acid. b)thiophene is reduced with H2 in presence of Raney Ni. [2015 AU]
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36) write the Skrup's quinoline synthesis.Describe [2012, 2015 AU]
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37) write chemical equation and detail mechanism of Fischer Indole synthesis. OR write a note [2012, 2014, 2016 AU]
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38) Explain why pyridine is less basic then alkyl amine. [2014 AU]
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39) Explain why pyridine is less reactive then benzene in electrophilic substitution reaction. [2014 AU]
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38) how will you distinguish between a)benzene and enthrance by UV-spectroscopy. b)CH3COOH and CH3COOC2H5 by IR-spectroscopy. c)CH3COCH3 and CH3CHO by IR-spcetroscopy [2012 AU]
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39) how many normal vibration mode are possible in the infrared absorption spectrum of H2O. [2012 AU]
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40) Write the basic principle of UV-visible spectroscopy. [2014, 2016 AU]
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41) How can a conjugated diene be distingushed from isolated diene by UV and visible spectra. [2014 AU]
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42) Describe briefly the Bischler-Napieralski isoquinoline synthesis. [2016 AU]
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40) write down the Debye-Huckel-Onseger equation, explaining the term involved. [2012 AU]
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41) Define transport number. [2014 AU]
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42) State and explain Kohlrausch's low of independent migration of ion. [2014, 2015 AU]
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43) Describe briefly the variation of equivalent conductance of both the weak and strong electrolytes with dilution. [2015 AU]
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41) what is a buffer solution. Explain the mechanism using suitable example. [2012, 2014 AU]
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42) Discuss Henderson's equation to calculate the pH of a buffer solution. [2014 AU]
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43) Define emf of a cell. [2015 AU]
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44) Derive the relationship between free energy change and the emf of a cell reaction. [2015 AU]
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45) Write the expression of the Nernst equation at 25 degree celcius for a general cell reaction. [2015 AU]
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46)
42) What are photosensitized reaction? give Example. [2012, 2014 AU]
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43) Explain the primery and secondary processes in photochemical reactions. [2014 AU]
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44) What is fluorescence ? [2014 AU]
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45) State and explain the first low of photochemistry. [2014 AU]
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46) Write the differences between thermal and photochemical processes. [2015 AU]
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47) State Stark-Einstein low of photochemical equvalence. [2015 AU]
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48) Define quantum yeild. [2015 AU]
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49) What should be quantum yeild for primery processes for photochemical reaction. [2015 AU]
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50) What is phosphorescence? [2015 AU]
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51)
43) Discuss the effect of pressure on Langmuir adsorption isotherm. [2012 AU]
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44) Show that for a moderate range of pressure it reduces to Freundlich adsorption ostherm .[2012 AU]
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45) write the expression for Freundlich adsorption ostherm and explain the term involved in it. [2014 AU]
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45) State Hardy-Schulze rule. [2012, 2014 AU]
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46) Define 'Gold-number'. [2012 AU]
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47) What do you mean by gold number of hemoglobin is 0.03. [2012 AU]
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48) What is tyndal effect. [2014 AU]
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49) Distinguish between lyophobic and Lyophillic colloids. [2014 AU]
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50) What is adsorption isotherm. [2014 AU]
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51) What is peptization. [2015 AU]
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52) How will you distinguish between physical and chemical adsorption. [2015 AU]
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53) Discuss the application of adsorption in industry. [2015 AU]
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56) Describe a suitable method for the preparation of colloidal solution of metal. [2015 AU]
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3) state Fajan's rule. [2015, 2016, 2012 AU]
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5) explain resonance. [2015, 2012, 2016 AU]
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8) explain polarisation of ion. [2014 AU]
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2) sp, sp3, dsp3, d2sp3 hybridization determine its angle. [2015, 2016 AU]
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4) draw the potential energy curve for hydrogen molecule. [2016 AU]
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6) Draw the resonance structure of CO3 2-ve and NO3 -ve[2012, 2016 AU]
Ans:-
7) Use Fajans rule to predict the salt having lower melting point from among Ki and Cul. [2012 AU]
Ans:-
9) Between LiCl and LiF which has higher boiling point, Justify your answer w.r.t. Fajan's rule. [2015 AU]
Ans:-
10) Explain the Fajan's rule for transition of ionic bond to covelent bond. [2016 AU]
Ans:-
UNIT II
11) Differentiate between bonding MO and antibonding MO. [2016, 2012 AU]
Ans:-
12) How do you express bond strength in term of bond order? [2016 AU]
Ans:-
13) Draw a MO energy level diagram for a)CO molecule b)NO molecule. [2016 AU]
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14) with the help of MOT, a)show that helium molecule does not exsist. b) Explain why N2 +ve has smaller dissociation energy N2. c)show that He2 +ve exists. [2016, 2014 AU]
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15) write the megnetic properties of N2 +ve. [2016 AU]
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16) between H2 +ve and H2 -ve which one is more stable and why. [2016 AU]
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17) write the MO electronic configuration of a)NO molecule b)O2 +ve, O2 -ve, and O2. [2016, 2014, 2012 AU]
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18) Write the bond order of a)H2, H2 +ve, H2 -ve. b)O2 +ve, O2 -ve, and O2. [2014 AU]
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UNIT III
Ans:-
24) Define hydrogen bond. [2015 AU]
Ans:-
25) Explain the type of hydrogen bond with suitable example. [2015 AU]
Ans:-
20) define crystal lattice and unit cell. [2014, 2012 AU]
Ans:-
21) Define weak interactions. [2014 AU]
Ans:-
22) Explain different types of van dar waal's interaction with suitable example. [2014 AU]
Ans:-
23) Calculate the number of atoms per unit cell of b.c.c. lattice. [2014 AU]
Ans:- 2 atom/unit cell
26) Calculate the number of atom present per unit cell of f.c.c. lattice. [2015 AU]
Ans:- 4 atom/unit cell
27) how will you distinguish between hexagonal close packing and cubic close packing. [2016 AU]
Ans:-
UNIT IV
29) what is the difference between priemery and secondary standard. Give example. [2012, 2014 AU]
Ans:-
30) Explain the principle and write the reaction involved in the estimation of Fe 3+ve ion by
a)K2Cr2O7 b)KMnO4. [2014, 2016 AU]
Ans:-
31) write the reaction involved in the estimation of cupper 2+ve using the sodium thiosulphate. [2014 AU]
Ans:-
32) Explain iodometric estimation. [2016 AU]
Ans:-
UNIT V
33) taking a suitable example write the mechanism of mannich reaction. [2012 AU]
Ans:-
34) Write a short note on wittig reaction. [2014 AU]
Ans:-
35) what is mannich base. Explain manich reaction with suitable example. [2014 AU]
Ans:-
36) Describe briefly the Michael reaction. [2014 AU]
Ans:-
37) Write the reagent used in the Meerwein-Pondrof-Verley reduction and also write the utility of this. [2015 AU]
Ans:-
38)
UNIT VI
34) what happen when pyrrole is treated with a)bromine in alcohol. b)Choloroform and alkali [2012 AU]
Ans:-
35) what happen when furan is treated react with a mixture of HCN and HCl. [2012 AU]
Ans:-
36) Write one method of preparation of each of pyrrol and furan. [2014 AU]
Ans:-
37) Electrophilic substitution of furan cannot be carried out in strongly acidic medium. Explain.[2014 AU]
Ans:-
38) Explain why pyrrole, furan, and theiophene are called the superaromatic. [2016 AU]
Ans:-
39) what happen when mixture of furan, ammonia and steam passed over heated alumina. [2015 AU]
Ans:-
40) write an method of synthesis of thiophene. [2015 AU]
Ans:-
41) what happen when a)pyrrole is teated with Zn in presence of acetic acid. b)thiophene is reduced with H2 in presence of Raney Ni. [2015 AU]
Ans:-
UNIT VII
36) write the Skrup's quinoline synthesis.Describe [2012, 2015 AU]
Ans:-
37) write chemical equation and detail mechanism of Fischer Indole synthesis. OR write a note [2012, 2014, 2016 AU]
Ans:-
38) Explain why pyridine is less basic then alkyl amine. [2014 AU]
Ans:-
39) Explain why pyridine is less reactive then benzene in electrophilic substitution reaction. [2014 AU]
Ans:-
UNIT VIII
38) how will you distinguish between a)benzene and enthrance by UV-spectroscopy. b)CH3COOH and CH3COOC2H5 by IR-spectroscopy. c)CH3COCH3 and CH3CHO by IR-spcetroscopy [2012 AU]
Ans:-
39) how many normal vibration mode are possible in the infrared absorption spectrum of H2O. [2012 AU]
Ans:-
40) Write the basic principle of UV-visible spectroscopy. [2014, 2016 AU]
Ans:-
41) How can a conjugated diene be distingushed from isolated diene by UV and visible spectra. [2014 AU]
Ans:-
42) Describe briefly the Bischler-Napieralski isoquinoline synthesis. [2016 AU]
Ans:-
UNIT IX
40) write down the Debye-Huckel-Onseger equation, explaining the term involved. [2012 AU]
Ans:-
41) Define transport number. [2014 AU]
Ans:-
42) State and explain Kohlrausch's low of independent migration of ion. [2014, 2015 AU]
Ans:-
43) Describe briefly the variation of equivalent conductance of both the weak and strong electrolytes with dilution. [2015 AU]
Ans:-
UNIT X
41) what is a buffer solution. Explain the mechanism using suitable example. [2012, 2014 AU]
Ans:-
42) Discuss Henderson's equation to calculate the pH of a buffer solution. [2014 AU]
Ans:-
43) Define emf of a cell. [2015 AU]
Ans:-
44) Derive the relationship between free energy change and the emf of a cell reaction. [2015 AU]
Ans:-
45) Write the expression of the Nernst equation at 25 degree celcius for a general cell reaction. [2015 AU]
Ans:-
46)
UNIT XI
42) What are photosensitized reaction? give Example. [2012, 2014 AU]
Ans:-
43) Explain the primery and secondary processes in photochemical reactions. [2014 AU]
Ans:-
44) What is fluorescence ? [2014 AU]
Ans:-
45) State and explain the first low of photochemistry. [2014 AU]
Ans:-
46) Write the differences between thermal and photochemical processes. [2015 AU]
Ans:-
47) State Stark-Einstein low of photochemical equvalence. [2015 AU]
Ans:-
48) Define quantum yeild. [2015 AU]
Ans:-
49) What should be quantum yeild for primery processes for photochemical reaction. [2015 AU]
Ans:-
50) What is phosphorescence? [2015 AU]
Ans:-
51)
UNIT XII
43) Discuss the effect of pressure on Langmuir adsorption isotherm. [2012 AU]
Ans:-
44) Show that for a moderate range of pressure it reduces to Freundlich adsorption ostherm .[2012 AU]
Ans:-
45) write the expression for Freundlich adsorption ostherm and explain the term involved in it. [2014 AU]
Ans:-
45) State Hardy-Schulze rule. [2012, 2014 AU]
Ans:-
46) Define 'Gold-number'. [2012 AU]
Ans:-
47) What do you mean by gold number of hemoglobin is 0.03. [2012 AU]
Ans:-
48) What is tyndal effect. [2014 AU]
Ans:-
49) Distinguish between lyophobic and Lyophillic colloids. [2014 AU]
Ans:-
50) What is adsorption isotherm. [2014 AU]
Ans:-
51) What is peptization. [2015 AU]
Ans:-
52) How will you distinguish between physical and chemical adsorption. [2015 AU]
Ans:-
53) Discuss the application of adsorption in industry. [2015 AU]
Ans:-
56) Describe a suitable method for the preparation of colloidal solution of metal. [2015 AU]
Ans:-
COMMENTS