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M P Keshari

Archive for the ‘Medical/Engineering Entrance’ Category

PHYSICS – SCALARS & VECTORS

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PHYSICS for MEDICAL & ENGINEERING 2 – Scalars and Vectors Question – 1. If A→×B→ = B→×A→, the angle between A→ and B→ is : (A) π/2                 (B) π                      (C) π/4                  (D) π/3 Solution : – Let angle between A→ and B→ be θ , And                        A→×B→ =             B→×A→ Or,                                          A→×B→ –             [...]

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PHYSICS – UNITS & DIMENSIONS

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PHYSICS for Medical and Engineering Units and Dimentions Question – 1. If E = electric field, μ0 = permeability of free space. E2/μ0 represents the dimensions : (A) [ML T–4A4]   (B)[ML2T–2 A2]   (C) [MLT2A–2]                     (D) [MLT–4] Solution : – We have,             E2/μ0 =             (Electric field)2/Permeability =             [MLT –3 A–1]2/MLT –2A–2 =             [MLT – 4] [...]

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CHEMISTRY – MEDICAL/ENGINEERING

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CHEMISTRY for MEDICAL/ENGINEERING Quantitative Estimations Question – 1. A non-volatile hydrocarbon has 5.6% hydrogen. When 3 g of hydrocarbon is dissolved in 100 g of benzene, the relative lowering vapour pressure of benzene is 1.306×10–2 Nm–2. The molecular formula of non-volatile hydrocarbon is : (A) C7H5 (B) C7H6 (C) C14H10 (D) C14H12 Solution : – [...]

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CHEMISTRY – MEDICAL/ENGINEERING

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CHEMISTRY for MEDICAL/ENGINEERING CRYSTALLOGRAPHY Question – 1. Sodium metal crystallizes in a boby-centred cubic lattice with the cell edge, a = 4.29 Å. The radius of sodium atom is : (A) 1.8578 Å                       (B) 1.8576 Å                        (C) 1.8574 Å                        (D) 1.8572 Å Solution : – We have, for b.c.c. lattice radius of Na   =             [...]

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CHEMISTRY – MEDICAL/ENGINEERING

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CHEMISTRY for MEDICAL/ENGINEERING THERMOCHEMISTRY Question – 1. The heat liberated on complete combustion of 7.8 g benzene is 327 kJ. This heat has been measured at constant volume and at 27° C. R is given to be 8.3 J mol – 1 K – 1. The heat of combustion of benzene at constant pressure at [...]

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Chemistry for Medical/Engineering

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CHEMISTRY for Medical/Engineering THERMODYNAMICS Question – 1. Two litres of N2 at 0° C and 6 atm pressure are expanded isothermally against a constant external pressure of 1 atm until the pressure of gas reaches 1 atm. Assuming gas to be ideal, the work of expansion is : (A) 810.10 J                        (B) 1012.62 J [...]

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Medical/Engineering

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CHEMISTRY for Medical/Engineering 10 – Colligative Properties and Solutions Question – 1. The molar volume of liquid benzene (density = 0.877 g/mL) increases by factor of 2750 as it vaporizes at 20° C and that of liquid toluene (density = 0.867 g/mL) increases by a factor of 7720 at 20° C. A solution of benzene [...]

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Medical/Engineering – Chemistry

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CHEMISTRY for MEDICAL/ENGINEERING 13 – IONIC EQUILIBRIUM Question – 1. 0.16 g of N2H4 are dissolved in water and the total volume made up to 500 mL. The Kb for N2H4 is 4.0×10–6 M. The percentage of N2H4 that has reacted with water in this solution is : (A) 2.5%                               (B) 2.0%                               (C) 1.9%                               (D) [...]

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Medical and engineering

This item was filled under [ Medical/Engineering Entrance ]

CHEMISTRY FOR  MEDICAL and ENGINEERING 12 – CHEMICAL EQUILIBRIUM Question – 1. KC for the reaction, N2 +             3H2 ↔         2NH3 is 0.5 mol–2 litre2 at 400 K. Given R = 0.082 litre atm degree–1 mol–1. KP is given by : (A) 4.650×10–4 atm–2 (C) 4.560×10–4 atm–2 (B) 4.648×10–4 atm–2 (D)4.548×10–4 atm–2 Solution : – [...]

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Medical/Engineering Entrance

This item was filled under [ Medical/Engineering Entrance ]

CHEMISTRY 11 – Chemical Kinetics Question – 1. The rate constant of a reaction is 1.5 × 107 sec–1 at 50° C and 4.5 × 107 sec–1 at 100° C. The Arrhenius parameters Ea and A are : (A) 2.3 × 104 J mol–1 & 5.42 × 1010 (C) 2.2 × 104 J mol–1 & [...]

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