B.tech CHEMISTRY PYQ 2022 complete solution || AKU || BEU ||

Chemistry pyq 2022 complete solution in one video .
This video is helpful for all btech 1st year student either in 1st sem or in 2nd sem. so please watch the complete video for your good marks in examination .
QUESTIONS ARE :-
1.(a). State de Broglie’s Principle.
1.(b). What is an orbital?
1.(c). Arrange the covalent bonds C-F, C-Br, C-Cl and C-I in increasing order of strength
1.(d). Which of Nh3, Ph3, Ash3 and Sbh3 possesses largest bond angle? Give reason.
1.(e). Out of cr2+ and cr3+, which one is stable in aqueous solution?
1.(f). Cu+ ion is colorless but Cu2+ ion is colored. Why?
1.(g). what is selection rule?
1.(h). A gas expands against vacuum what is the work done on it
1.(i). what is the condition for a reaction to be in equilibrium?
1.(j). the presence of co2 in boiler, feed water should be avoided why?
2.(a) Write a short note on the following:
(i) wave particle duality
(ii). Heisenberg’s uncertainty principle
2. (b). Discuss Photoelectric effect (with mathematical equation) for explaining the particle nature of light.
2.(c). How many photons of light having a wavelength 4000A˚ are necessary to provide 1.00J of energy?
3.(A). Which of the following two molecules has a higher Bond length?
(i) o2
(ii) o2+
(iii) o2-
Explain using Molecular orbital theory.
3.(b). Draw the mo energy level diagram for molecule using this diagram calculate and explain bond order and magnetic behavior of (i) NO, (ii) NO+ and (iii) NO-.
4.(a) The internuclear distance of NaCl is 2.36 x10-10m. Calculate the reduced mass and moment of inertia of NaCl. (Atomic mases of Cl= 35 x10-3 kg mol-1 and Na =23x 10-3 kg mol-1)
4.(b). Calculate the force constant for CO, if it absorbs at 2.143 x 105 m-1 (Atomic mass of c = 12*10-3 kg mol-1 and O = 16 * 10-3 kg mol-1)
4.(c). Which type of electronic transition (s) is / are observed in uv - visible spectrum of phenol in the range 200 nm to 900 nm? justify your answer.
5.(a). How many types of HNMR signals are expected for (i) CH2BrCH2Cl and (ii) CH3OCh3? Mention relative intensity ratio for the signal(s) observed for (i) and (ii).
5.(b). At what frequency shift from TMS, would a group of nuclei with S =1.5 resonant in NMR spectrometers operating at 60 MHz and 400 MHz?
5.(c). 2 mol of NH3 at 300 K occupied a volume of 5 *10^-3 m^3. Calculate the pressure using van der Waals equation. (a=0.417 Nm^4 mol^−2, b=0.037*10^-3 m^3 mol−1). Compare the above result with the pressure calculated using ideal gas equation.
6.(a). 7 moles of a monoatomic ideal gas are compressed reversibly and adiabatically. The initial volume is 16 dm^3 and the final volume is 7 dm^3 the initial temperature is 27 °C
(i)what would be the final temperature in the process.
(ii) calculate w, q and Delta U for the process. Given CV= 20.91 JK^-1 mol^-1 , γ = 1.4
6.(b) Write a cell (in proper cell representation) whose cell reaction is AgCl → Ag+CI-, using the following standard electrode potentials at 298 K:
E° AgCl/AgCI-=0.22 V, E° Ag+/Ag =0.80 V
Calculate E° of the cell. Calculate solubility product (or solubility constant) of AgCl and its solubility at 298 K.
7.(a) A water sample had the following constituents per liter :
CaCO3 = 65 mg, MgHCO3 = 80 mg, CaSO4 = 155 mg, MgSO4 =135 mg, NaCl = 8 mg. Calculate the quantity of temporary and permanent hardness in the water sample. Calculate the quantity of lime (80% purity) and soda (90% purity) required for softening of 1 million litre of above water sample
7.(b). In an experiment to determine the hardness of a sample of water, 25 ml of N/50 Na2CO3 solution was added to 100 ml of water sample. After complete precipitation of insoluble carbonate, the unreacted Na2CO3 was titrated against N/50 H2SO4 solution, when 10 ml of acid was required. Calculate the hardness and comment on the nature of hardness so determined.
8.(a). Write notes on the following: -
(i). Optical isomerism of lactic acid
(ii). Optical isomerism of tartaric acid
(b). Differentiate between the following :
(i) Enantiomers and diastereomers
(ii) Racemic mixtures and meso compounds
9.(a). Explain the following:
(i). Acetic acid is stronger acid than phenol
(ii). The amino group in aniline is o- and p- directing but amide group is meta-directing.
9.(b). Arrange the following carbocations in order of increasing stability with suitable reasons: C6H5CH2+; (CH3)3C+; (C6H5)2CH+; CH3CH2+

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