BSc Chemistry SEM II 2018 19 May 2018-19 CHEMISTRY PAPER I Question Paper - Mumbai University | munotes

Questions asked in this paper

• Please check whether you have got the right question paper

1. Q1 All the Questions are compulsory
2. Q2 Figures to the right indicate full marks
3. Q3 The use of log table /programmable calculator is allowed
4. Q4 Answers for the same question should be written together
5. Q1 A) Select the correct option and complete the following sentences (Attempt any twelve) 12 marks
6. Q1 Molar volume of NH; gas at NTP is
   • ii) The second law thermodynamics introduces concept The compressibility factor is expressed by equation
   • iv) The mass of 22400 of =12,0=16 )gas at NTP will be
   • v) For the reaction (g) + ===
   • vi) When salt dissolves in water,
   • vii) Carbon dioxide, and sulphur dioxide are__ gases The colour of the bromine gas is
   • ix) Ions with negative charges are called
   • x). According to Lowry- Bronsted concept base is Xi) is the Bronstead base is the hard acid Bromination of propane gives as a major product
   • xiv) Reaction intermediate in E, reaction is
   • xvi) Diels-Alder reaction is an example of reaction
   • a) addition b) c) substitution sp hybridized carbon is more _than sp” or hybridized carbon Xviil) Catalytic hydrogenation of alkenes
   • B) State whether the following sentences are true or false. (Attempt any 3
7. Q1 Reaction between NaOH and is reversible Entropy is an extensive property
   • iii) Ammonium chloride and ammonium hydroxide have uncommon ions
   • iv) To maintain constant pH a buffer mixture is used
   • v) Hydroxylation of alkene by is stereospecific reaction
   • C) Match the following (attempt any five). 5 is zero b) Toxic
   • iv) As d) Va 1/P Attempt any four of the following
   • A) State and explain Joule Thomson’s effect. 5
   • B) Derive van der Waals equation for pressure correction. 5
   • C) Calculate the pressure exerted by Imol of NH; in at 300K using 5
   • a)ideal gas equation b) van der Waals equation. The value of van der Waals constant ‘a’ and ‘b’ for NH; are
   • D) What are Kp and Ke ? Obtain relationship between them. 5
   • E) State the Le-Chateliers principle and discuss its application. 5
   • F) Explain entropy of a system. For the reaction 5 +3H2(g) === standard free energy at 298K is -103.25 KJ. Calculate equilibrium constant for the reaction at same Attempt any four of the following
   • A) Write short note on use of complexes forming ability in qualitative 5 analysis with any one example
   • B) What do you mean by qualitative analysis? What are the types of iton 5 the basis of weight of sample?
   • C) How will you prepare starch iodide paper and lead acetate reagent 5
   • D) Explain Arrhenius concept of acids and bases. 5
   • E) What is Pearson’s concept of hard soft acids and bases? 5
   • F) Give any three advantages and limitations of Lewis concept of acids 5
8. Q4 Attempt any four of the following Explain Wurtz-Fittig reaction with examples. 3
   • ii) Explain : Iodination of alkanes is difficult. 2
   • B) Complete the following reaction and give its mechanism 5
   • C) i) State and explain Hofmann elimination with suitable example. 3
9. Q11 Complete the following reactions 2 marks
   • D) i) How does acetylene converted into following compounds? 3 Give ozonolysis products of 2-methyl propene. 2
   • E) Explain the mechanism of hydroboration-oxidation of alkene with 5
   • F) Explain the mechanism of E,- elimination reaction with energy profile — 5
10. Q5 Attempt any four of the following
    • A) State and explain the law of mass action. What is the significance of 5
    • B) Explain the assumptions of kinetic theory of gases 5
    • C) Calculate the solubility in pure water of silver chloride whose 5 solubility product is 1.1x at 298 K
    • D) What are the different types of titrations on the basis of reaction 5
    • E) How are metal acetylides prepared? How is sodium acetylide 5 converted to propyne and 1- butyne ?
    • F) Explain the mechanism of 1,2 and 1,4- addition of to 1,3- 5

Read from the scan above, so a character or two may differ. The scan is the original.