BSc Chemistry SEM I 2022 2023 Dec 2023 CHEMISTRY I Question Paper - Mumbai University | munotes

Questions asked in this paper

• it) figures to the right indicate full marks

1. Q1 A] Attempt one of the following: {10} and prove work energy theorem
2. Q11 A body of mass m 1s suspended by two strings making angles a and 6 with the Find the expression for tensions in the strings B Find magnitudes of tensions Tl and T2 im the nwo strings
3. Q1 Attempt of the following: {5 Marks each}
4. Q1 A cricket ball of mass 330g 1s moving with a velocity of and is hit bv a bat so that the is turned back with a velocity of 24m/s.The force of the blow acts for 0.035s Find the average force exerted on the ball by the bar
   • u) The force on point mass of 50g it starts from rest. Find its position at a
5. Q11 Explain the work done by constant force when the work done is negative and zero
   • iv) advantages and disadvantages of friction
6. Q2 A] Attempt one of the following: 1! Show that for homogeneous material Y= 1:) For liquid flowing through pipe of variable cross-section, Show that the velocity of a section varies inversely as the area of cross section of section
7. Q2 Attempt of the following: {5 Marks each} [10}
8. Q1 For a steel material, Nim? and bulk modulus 1s 1.33x : ratio and modulus of rigidity of With the help of a diagram explain how will vou measure the speed of Efflux wire has Young's modulus subjected to a stress of If the length of wire 1s the extension produced in it 1v) Define ratio Show that the values of ratio are and
9. Q3 A] Attempt one of the following:
10. Q1 Derive the expression for the work done by the system in the Adiabatic process )State the ideal gas equation. Discuss the Van der waals correction to the pressure and in terms of this equation VCD Physics I Total Marks-75 Time-2:30 Hrs
11. Q3 B] Attempt any two of the following: Marks each} 10 marks
    • i) One mole of a perfect gas at undergoes till the volume is doubled Calculate the work done by gas and heat absorbed.Given: R=8.3J/mol’K State and prove Zeroth law of the thermodynamics 2 moles of gas expands isothermally and reversibly from 20L to at the work
    • iv)One mole of gas obeying Van der Waals equation at occupies of volume Calculate the pressure exerted by
12. Q4 any 3 of the following {5 Marks each} 15 marks
    • i) Explain the concept of free body diagram with illustration
    • ii) A mass is suspended from rigid Support by and in extensible string OA of negligible mass The mass is pulled aside by a similar horizontal string AB until OA and with the vertical Show that tension in the string AB and OA are given respectively T] = mg and T2 =my Define stress and Strain write the SI uni, and dimension of it
    • iv) A metal wire of length L and radius R is stretched assuming that the volume of the wire is unchanged show that Poisson's ratio of material is 4,
13. Q5 calculate diameter of the molecules of a gas for which the Van der waals constant b is when referred to one cc of gas at NTP
    • vi) Explain the work is a path dependence

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