BSc Chemistry SEM I 2019 20 Nov 2019-20 CHEMISTRY PAPER I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 A. Select the correct option. 12 marks
   • i) State functions are
   • ii) Volume is All four quantum numbers of any two electrons cannot be
   • a)same b)different
   • iv) Carbocations are electron
   • a)Rich deficient c)
   • vi) Carbon-Carbon bond length is -------------- bond Vil) are electron deficient species vill) The shape of P orbital is
   • ix)In ground state of an atom, the electron occupies the---------- energy
   • x)Bond angle in methane is
   • a) b) Ic) x1) 3s orbital has __ radial nodes is non polar molecule MARKS 100 TIME 3 HRS
   • B. State whether true of False 3
2. Q1 Leroth law of thermodynamics was discovered before first and second law of
3. Q2 Molar heat capacity is is intensive property
4. Q3 State functions are path dependent
   • C. Match the following columns 5
5. Q2 Intensive property b)S
6. Q3 Ether c)H
7. Q4 Enthalpy d) Sodium
8. Q5 Entropy e) R-0-R
9. Q2 Answer any four of the following:
   • A) If the heat of formation of methane at constant pressure is -74.9 KJmol-1 298K , What is its value at constant volume?
   • B) Define the i) open system 1i) Boundry iii ) State function iv) Isothermal process
   • v) Isochoric process
   • C) Explain the term Heat capacity
   • D) Explain relationship between mole fraction and molarity
   • E) Give limitations of first law of thermodynamics
   • F) Calculate the Heat of formation of benzene at C.if the heat of combustion of benzene ,and hydrogen are respectively at
10. Q3 Answer any four of the following: {20]
    • A) Explain Rutherford’s model of atom based on alpha particle scattering experiment
    • B) Explain Lyman and Balmer series of spectral lines observed in atomic spectrum of hydrogen. In which spectral regions are the lines observed?
    • C) What is meant by atomic size? Explain its variation down the group
    • D) State modern periodic law. What are the types of elements in the long form of periodic
    • E) State Aufbau principle. Draw the energy level diagram for the
    • F) Explain advantages of Bohr’s atomic model
11. Q4 Answer any four of the following: 20 marks
    • A)Draw structures of the following compounds
12. Q1 n-butane
13. Q2 Methyl cyclopentane
14. Q3 Propanone
15. Q4 N- Methyl - butanamine MARKS 100 TIME 3 HRS
    • B) Give one example of following reactions
16. Q1 Elimination Reaction
17. Q2 Addition Reaction
    • C) Explain sp hybridization with suitable example
    • D) Explain structure of free radicals
    • E) Distinguish between sigma and pi bonds
    • F) Give IUPAC names of following compound
    • iii) iv)
18. Q5 Answer ic of the following: 20 marks
    • A) 12 g of Na2CO3 dissolved in 100ml of solution Na=23,C=12,0==16 Calculate
    • (ii) Molarity of the and ions
    • B) Calculate the weight of following substances that will be required to prepare 250 ml
    • C) State modern pe: iodic law. Explain briefly classification of elements as main group and transition elements with two examples of each State factors influencing ionization enthalpy values. First ionization enthalpy nitrogen is higher than that of oxygen. Explain
    • E) Define i) Inductive effect ii) electrometric effect iii) Resonance iv)
    • v) free radical)
    • F) Explain the Hybridization of oxygen in methanol

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