AKU Previous Years Question Paper(2022) Solution

Q. 5 moles of a monoatomic ideal gas are compressed reversibly and adiabatically. The initial volume is 6 dm3 and final volume is 2 dm3. The initial temperature is 27 °C. Calculate the final temperature in this process. Calculate w, q and AU for the process. Given Cu = 20.91JK-1 mol-1 and y = 1.4. 

[AKU Paper Code 100103 Question No. 2 (A) 2018]

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Q. At 298 K, the standard free energies of formation of CH3COOH (aq), CH3COO- (aq) and H+ (aq) are -396.6, -369.4 and 0 kJ mol-1, respectively. Calculate the equilibrium constant for the dissociation of acetic acid at 298 K.

[AKU Paper Code 100103 Question No. 2 (B) 2018]

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Q. The speed of an electron moving at 600 ms’ is measured to an accuracy of 0.005%. What would be the minimum error in determining its position? (Mass of electron 9.1×10-31 kg and Planck constant, h=6.6×10-34 kg m2s-1)

[AKU Paper Code 100103 Question No. 3 (A) 2018]

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Q. Discuss the failures of classical mechanics to explain properties of particles at atomic and sub-atomic level. 

[AKU Paper Code 100103 Question No. 3 (B) 2018]

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Q. Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize sodium ion. Calculate the ionization energy of sodium atom in kJ/mol (c = 108 ms – and h=6-626×10-3 J-S.)

[AKU Paper Code 100103 Question No. 3 (C) 2018]

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Q. Draw the MO energy-level diagram for N2 and based on the diagram, explain the magnetic property observed in N2.

[AKU Paper Code 100103 Question No. 4(A) 2018]

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Q. Explain geometrical isomerism anoptical isomerism for transition metal complex with an example for each

[AKU Paper Code 100103 Question No. 4(B) 2018]

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Q. Calculate the force constant of co molecule, if its fundamental vibrational frequency is 2140 cm-1(At. mass of carbon = 1.99×10-26 kg and 0 =2.66×10-26 kg.).

[AKU Paper Code 100103 Question No. 5(A) 2018]

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Q. Microwave spectrum of gaseous HCI molecule exhibits a series of equally spaced lines with interspacing of 20. 7 cm-1. Calculate the internuclear distance of HCl molecule. 

[AKU Paper Code 100103 Question No. 5(B) 2018]

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Q. How many ‘H NMR signals are there in the following? 

(i) CH3 -CH3

(ü) CH3 – CH2 – CH2

(üi) CH3 – CH2 – Cl

(iv) CH3 – CHCI – CH3 

(v) C6H3CH3

(vi) C6H5CH2CH3

[AKU Paper Code 100103 Question No. 5(c) 2018]

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Q.  Write short notes on the following: 

(i) Magnetic resonance imaging

(ii) Fingerprint region in infrared spectroscopy

(üi) Different types of electronic excitations

[AKU Paper Code 100103 Question No. 6(a) 2018] 

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Q. Use the equation of state of van der Waals to calculate the pressure of 8 g of gaseous CO2 occupying a volume of 8 L at 27 °C. (Given, a = 3.6L2 atm mol-, b=0.043L mol-?, R=0.082 L atm K-1 mol-1). Compare the above result with the pressure calculated using ideal gas equation. 

[AKU Paper Code 100103 Question No. 6(b) 2018]

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Q. Calculate the quantity of lime and soda required for softening 50000 litres of water containing the following: Ca(HCO3)2 = 8.1 ppm, Mg (HCO3)2 = 7.5 ppm, CaSO4 = 13.6 ppm, MgSO4 = 12 ppm, MgCl2 = 2 ppm, NaCl = 4.7 ppm.

[AKU Paper Code 100103 Question No. 7(A) 2018]

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Q. 20 mL of standard hard water (containing 15 g CaCO3 per litre) required 25 mL of EDTA solution for end point. 100 mL of water sample required 18 mL of EDTA solution, while same water after boiling required 12 mL EDTA solution. Calculate carbonate and non carbonate hardness of the water sample.

[AKU Paper Code 100103 Question No. 7(B) 2018]

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Q. 20 mL of 0:1 N Na2Co3 solution was added to 100 mL of a sample of hard water. The filtrate from the above required 3 mL of 0.05 N H2SO4 for complete neutralization. Calculate the hardness of the water sample. 

[AKU Paper Code 100103 Question No. 7(c) 2018]

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Q. Describe the removal of hardness of water by ionexchange method

[AKU Paper Code 100103 Question No. 7(d) 2018]

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Q. Describe two methods used for resolving racemic mixtures into optically active compounds

[AKU Paper Code 100103 Question No. 8(a) 2018]

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Q. Write the possible optical isomers of tartaric acid

[AKU Paper Code 100103 Question No. 8(b) 2018]

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Q. Differentiate between (1) enantiomers and diastereomers and (ii) racemic mixture and meso compounds. 

[AKU Paper Code 100103 Question No. 8(c) 2018]

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Q. Write the product for the following reactions together with reaction mechanisin : 

(i) 2CH3COCH3 +OH → 

(ü) CH3CH2OH (heated with H2S04) →

[AKU Paper Code 100103 Question No. 9(A) 2018]

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(b) Write short notes on the following: 

(i) Steric effects

(ii) Diels-Alder reaction 

[AKU Paper Code 100103 Question No. 9(B) 2018]

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