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MEGHALAYA CIVIL SERVICE JUNIOR GRADE [PART B MAINS] (FEB 2022 AND JULY 2023)NO.MPSC/ADVT-54/1/2020-2021/53 — question paper

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MEGHALAYA CIVIL SERVICE JUNIOR GRADE [PART B MAINS] (FEB 2022 AND JULY 2023)NO.MPSC/ADVT-54/1/2020-2021/53

Paper #3084 · 02-2022 · 573 reviewed questions · Showing 361–400 of 573

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Accuracy note: This is a reviewed structured rendering of an official previous-year paper and may cover only part of it. Where available, explanatory notes describe unresolved source or answer issues without supplying a scoring answer. Official examination authority notices remain final.

  1. COMMERCE AND ACCOUNTANCY-II, Paper-VII, Optional. 250 marks; 3 hours. Candidates should attempt Question No. 1 which is compulsory and four of the remaining questions, selecting at least two from each Part. Q1 has separate OR alternatives. Each integrated response carries 50 marks; all its subparts must be answered. No word limit is printed.

    (a) Discuss, in brief, the benefits of worker’s participation in management.
    (b) What are the main causes of high labour turnover in Indian service sector? Suggest remedies, if any.
  2. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q1 has six lettered subquestions, jointly carrying50marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Write down the Schrödinger wave equation for an electron propagating in three dimensions in space and explain the terms involved. Explain the significance of ψ and ψ².
  3. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q1 has six lettered subquestions, jointly carrying50marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Explain the term dual character of matter and radiation and derive the de Broglie’s equation.
  4. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q1 has six lettered subquestions, jointly carrying50marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Draw the molecular orbital diagram of O₂ and O₂⁺. Calculate the bond order and discuss their magnetic properties.
  5. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q1 has six lettered subquestions, jointly carrying50marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What type of hybridization is expected for I₃⁻ and ClF₃? Explain the geometry of these molecules using VSEPR theory.
  6. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q1 has six lettered subquestions, jointly carrying50marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Derive the Bragg’s equation for X-ray diffraction of a crystal.
  7. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q1 has six lettered subquestions, jointly carrying50marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What are point defects? Explain the different types of point defects present in a crystal.
  8. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q2 has seven lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What type of defects in crystals imparts both paramagnetic effect and colour of the solid? How are such defects caused? Explain with a suitable example.
  9. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q2 has seven lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Draw Born-Haber cycle for the formation of NaCl, mentioning various terms involved. How does Born-Haber cycle explain the solubility of ionic compounds?
  10. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q2 has seven lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    If heavier gas molecules move more slowly than light gas molecules, why is the average kinetic energy independent of gases?
  11. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q2 has seven lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Give the proper reasons to justify whether the following systems will obey Maxwell’s law or not :
    (i) Pressure is trebled in an ideal gas obeying Maxwell’s law initially
    (ii) A gas, obeying Maxwell’s law initially, is placed in the gravity field of the earth
  12. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q2 has seven lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    “The viscosity of a gas increases with increase in temperature.” Explain.
  13. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q2 has seven lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    “Volatile liquids must have lower surface tension and viscosity.” Explain.
  14. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q3 has six lettered subquestions, jointly carrying 50 marks. This batch covers3(a,b,c,e,f),40marks; diagram3(d) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    State the first law of thermodynamics and derive its mathematical equation. How does the equation become in case of (i) a closed system and (ii) an adiabatic process?
  15. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q3 has six lettered subquestions, jointly carrying 50 marks. This batch covers3(a,b,c,e,f),40marks; diagram3(d) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    State Nernst heat theorem. How does it lead to the enunciation of the third law of thermodynamics?
  16. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q3 has six lettered subquestions, jointly carrying 50 marks. This batch covers3(a,b,c,e,f),40marks; diagram3(d) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Calculate the entropy change when 1 mole of ethanol is evaporated at 351 K. The molar heat of vaporization of ethanol is 39·84 kJ mol⁻¹.
  17. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q3 has six lettered subquestions, jointly carrying 50 marks. This batch covers3(a,b,c,e,f),40marks; diagram3(d) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Phenol and water are partially miscible liquids. By mixing these two liquids, we get two phases at equilibrium. Find the number of degrees of freedom of the system.
  18. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q3 has six lettered subquestions, jointly carrying 50 marks. This batch covers3(a,b,c,e,f),40marks; diagram3(d) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    The normal boiling point of methanol is 64·7 °C. Calculate the boiling point of methanol at an elevation of 4000 m above sea level where the pressure is 478 mmHg. The heat of vaporization of methanol is 35·3 kJ mol⁻¹.
  19. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q4 has six lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Derive Nernst equation for measuring EMF of a cell.
  20. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q4 has six lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Calculate the EMF of a zinc-silver cell at 30 °C when activity of Zn²⁺ ions is 0·5 and the activity of Ag⁺ ions is 10. Standard reduction potentials at 30 °C are—
    (i) Ag⁺, Ag electrode = +0·799 volt;
    (ii) Zn²⁺, Zn electrode = −0·760 volt.
  21. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q4 has six lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What is electrochemical series? What are its applications?
  22. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q4 has six lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Can a solution of 1 M CuSO₄ be stored in a vessel made of nickel metal? Given that, E°(Ni, Ni²⁺) = +0·25 volt and E°(Cu, Cu²⁺) = −0·34 volt.
  23. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q4 has six lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Write short notes on the following :
    (i) Concentration cells
    (ii) Overpotential
  24. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q4 has six lettered subquestions, jointly carrying 50 marks. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Discuss, in detail, the collision theory of bimolecular reactions. What are the limitations of this theory?
  25. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q5 has six lettered subquestions, jointly carrying 50 marks. This batch covers 5(b,c,d,e,f), 40 marks; diagram 5(a) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What is meant by steady-state approximation? How does this approximation help in deriving the kinetics of the following photochemical reaction?
    H₂(g) + Cl₂(g) → 2HCl(g)
    Explain why the quantum yield of this reaction is extremely high.
  26. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q5 has six lettered subquestions, jointly carrying 50 marks. This batch covers 5(b,c,d,e,f), 40 marks; diagram 5(a) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    The blue solution of CuSO₄ slowly gets discharged when a zinc rod is dipped into it. Explain this observation from the following electrode potentials :
    E° of Cu²⁺/Cu and Zn²⁺/Zn are +0·34 V and −0·76 V respectively.
    Also write the relevant equation.
  27. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q5 has six lettered subquestions, jointly carrying 50 marks. This batch covers 5(b,c,d,e,f), 40 marks; diagram 5(a) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Derive Langmuir adsorption isotherm. How does this isotherm help in elucidation of kinetics of a gaseous reaction on solid surface?
  28. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q5 has six lettered subquestions, jointly carrying 50 marks. This batch covers 5(b,c,d,e,f), 40 marks; diagram 5(a) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Discuss the BET theory of multilayer adsorption.
  29. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q5 has six lettered subquestions, jointly carrying 50 marks. This batch covers 5(b,c,d,e,f), 40 marks; diagram 5(a) remains pending. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Differentiate between physisorption and chemisorption.
  30. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q6 has five lettered subquestions, jointly carrying 50 marks. This batch covers all five responses 6(a,b,c,d,e). A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Discuss the structure of myoglobin and haemoglobin. Discuss, in detail, the roles played by these bioinorganic compounds in biological systems.
  31. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q6 has five lettered subquestions, jointly carrying 50 marks. This batch covers all five responses 6(a,b,c,d,e). A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What is nitrogen fixation? Discuss briefly biological nitrogen fixation.
  32. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q6 has five lettered subquestions, jointly carrying 50 marks. This batch covers all five responses 6(a,b,c,d,e). A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    How do the d-orbital energy levels split when a transition metal ion is placed in an octahedral crystal field of the ligands?
  33. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q6 has five lettered subquestions, jointly carrying 50 marks. This batch covers all five responses 6(a,b,c,d,e). A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What is meant by spectrochemical series?
  34. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q7 and Q8 each carry 50 marks. This batch covers Q7(a,c,d,e,f) and Q8(b,c,d,f), nine lettered responses totalling 69 marks; other lettered parts are not included. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    On the basis of CFT, explain the following giving appropriate reasons for your answers :
    (i) [CoF₆]³⁻ ion is paramagnetic while [Co(CN)₆]³⁻ ion is diamagnetic.
    (ii) [Fe(CN)₆]⁴⁻ ion is diamagnetic while [Fe(CN)₆]³⁻ ion is paramagnetic, although both the ions have strong ligands.
  35. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q7 and Q8 each carry 50 marks. This batch covers Q7(a,c,d,e,f) and Q8(b,c,d,f), nine lettered responses totalling 69 marks; other lettered parts are not included. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What do you mean by labile and inert complexes? Explain.
  36. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q7 and Q8 each carry 50 marks. This batch covers Q7(a,c,d,e,f) and Q8(b,c,d,f), nine lettered responses totalling 69 marks; other lettered parts are not included. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    How does the presence of a ring structure affect the stability of complexes?
  37. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q7 and Q8 each carry 50 marks. This batch covers Q7(a,c,d,e,f) and Q8(b,c,d,f), nine lettered responses totalling 69 marks; other lettered parts are not included. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Explain why [Ni(CN)₄]²⁻ is thermodynamically stable but kinetically labile.
  38. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q7 and Q8 each carry 50 marks. This batch covers Q7(a,c,d,e,f) and Q8(b,c,d,f), nine lettered responses totalling 69 marks; other lettered parts are not included. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What are metal carbonyls? Give one method of preparation each for Cr(CO)₆ and Ni(CO)₄.
  39. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q7 and Q8 each carry 50 marks. This batch covers Q7(a,c,d,e,f) and Q8(b,c,d,f), nine lettered responses totalling 69 marks; other lettered parts are not included. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    What is lanthanide contraction? What are its consequences? Explain the separation of lanthanides by ion-exchange method.
  40. CHEMISTRY-I, Paper-VI, Optional. 250 marks; 3 hours. Answer any five questions. Q7 and Q8 each carry 50 marks. This batch covers Q7(a,c,d,e,f) and Q8(b,c,d,f), nine lettered responses totalling 69 marks; other lettered parts are not included. A candidate selects whole parent questions, not independent subquestions. The figures in the margin indicate full marks. No word limit is printed.

    Sketch the synthesis of [Fe(η⁵-C₅H₅)(η⁵-C₅H₄COOH)] complex starting from [Fe(η⁵-C₅H₅)₂].

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