BSc Biochemistry Sem I ATKT BIO CHEM CHEMISTRY PAPER I Question Paper - Mumbai University | munotes

Questions asked in this paper

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• 2. Figures to the right indicate full marks

1. Q3 The use of log tables/non programmable calculator is allowed
2. Q4 Answers for the same questions as for as possible should be written together
3. Q1 (A) Select the correct option and complete the following sentences (any twelve) 12 marks
   • i) For exothermic reaction, internal energy is
   • ii) If the boundary prevents any interaction of system with the surrounding, the system
   • iii) If work is done by the system, W is taken as
   • iv) The Kirchoffs equation is
   • a)( AH2 (T2-T1)
   • v) Sum of mole fraction of two components is
   • vi) The equivalent weight of ammonia
   • vii) The shell with n=3 is denoted
   • ix) The atoms having . electron are called Hydrogenic atoms
   • x) The properties of elements are periodic functions of their. according to
   • xi) ‘d’ block elements are xil) The nuclear charge . regularly as the atomic number increases
   • a) decreases b) increases c) remains the same xill) The group .exhibits +I effect
   • xiv) has greater dipole moment 1S an electrophillic reagent
   • xvi) Hybridization of carbon in carbocation is reactions involve heterolytic fission of covalent bonds
   • (B) State whether the following sentences are True or False (any three) 03
4. Q1 Molar entropy is an extensive property of the system
   • ii) Normality is dependent on temperature ili) Zeeman effect is explained by Bohr’s theory of atomic structure
   • iv) The enthalpy of ionization for noble gases are very high
   • v) Electrometric effect is temporary effect
   • vi) Chloroform is non polar molecule
   • (C) Match the following (any five ) 05
5. Q1 Intensive property a positive centre of atom
   • iv) Electronegativity of chlorine
   • v) Nitrile
   • vi) Lewis base more solvent than solute
6. Q2 Attempt any four of the following
   • A) With suitable example, explain the concept of state function and path function. 05
   • B) State the first law of thermodynamics in any three forms and derive the mathematical 05 expression for it
   • C) 1.5 mole of an ideal gas at 2 atmospheres and is compressed isothermally to one half 05 its volume by an external pressure of 4. atmospheres. Calculate the work done (R=0.082 atm
   • D) Define enthalpy of formation of molecule and explain it with suitable example. 05
   • E) How can concentration of solution be classified based on physical and chemical units? 05 What is the weight of solute dissolved in 100cm? of 0.15N Naz CO3 (Mol.Wt of CO3= 05
7. Q3 Attempt any four of the following
   • A) Calculate the effective nuclear charge for 2p electron in Oxygen (Z=8). 05
   • B) Describe Rutherford’s atomic model. 05
   • C) . Discuss the angular shape of s and p orbital. 05
   • D) in brief the history of periodic table. 05
   • E) How are the elements in the periodic table classified? 05
   • F) Discuss the Paulings method to determine electronegativity of elements. 05
8. Q4 Attempt any four of the following
   • A) Write the IUPAC name for the following compounds 05
   • B) Explain sp* hybridization of carbon with suitable example. Draw orbital diagram of 05
   • C) Explain the structure of free radicals. 05
   • D) Explain the stability of carbocation on the basis of hyperconjugation.and resonance effect. 05
   • E) 1) Explain the term nucleophile with suitable example. 02
   • ii) Explain sp hybridization of nitrogen with suitable examples. 03
   • F) i) Draw the structure of the following compounds 03 Indicate the type of hybridisation of C,O atoms in methanol. 02
9. Q5 Attempt any four of the following
   • A) Explain the term enthalpy of combustion and give its applications. 05
   • B) 10g of urea (M.Wt=60) is dissolved in 297 g of water. Calculate the mole fraction of each 05
   • C) Write short note on Aufbau principle. 05
   • D) What are the factors affecting the magnitude of enthalpy of ionization. 05
   • E) i) Discuss the orbital structure of ethane. 03
   • ii) Explain “aniline is weakly basic than aliphatic amines.” 02
   • F) Write note on inductive effect. 05

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