BSc Sem III 2023 2024 2024 CHEMISTRY II Question Paper - Mumbai University | munotes

Questions asked in this paper

• ii) Figures to the right indicate full marks

1. Q1 A) select the correct option from the following statements and rewrite the statement
   • 1) The molecularity of reaction X + 2Y gives product is
   • ii)2 3 iv) 4
   • 2) In the context of chemical reaction what distinguishes a complex reaction from simple
   • i) Complex reaction involves multiple step and intermediate species
   • ii) Complex reaction occurs only in organic chemistry
   • iii) simple reaction are faster than Complex reactions
   • iv) Complex reactions do not involve any catalyst
   • 3) when a solute distribute itself between two immiscible liquids in contact with each other a mathematical constant ratio exist between
   • i) the weight of solute into liquids **ii) concentration of solute in two liquids
   • iii) number of moles of solute in two liquids number of atoms of solute in two liquids
   • 4) system that shows lower critical solution temperature is
   • 5) Nitrogen dioxide and nitrogen tetraoxide are in
   • 6) Nitric oxide is prepared on large scale by
   • 1) Willkinson's process using platinum as catalyst ii)Ven't Hoff process using platinum as catalyst
   • iii)Pfann's process using platinum as catalyst iv)Ostwald's process using platinum as catalyst
   • 7) what is the hybridization of silica?
   • 8) Nitrous oxide is
   • 9) The carbony! group is highly polar due to difference in electronegativity of atoms
   • iii) C and N
   • 10) Aldehyde are more reactive towards than ketones due to presence of electron
   • 11) Gattermann Koch formylation method is used to prepare
   • 12) Aldehyde or Ketone reacts with a primary amine to give an
   • B) state whether the following statements are true or false 3
   • 1) Nicotine water system shows both upper and lower critical solution temperature
   • 3) Rosenmund reduction is a selective reduction of acid halide into an aldehyde by
   • C) Match the Following 3
   • 1) Rosenmund Reduction a) +2
2. Q2 Answer the following questions (any four) 20 marks
   • 1. Explain types of complex reaction with suitable example
   • 2. State and derive Raoult's law
   • 3. Explain phenol water system with proper diagram
   • 4. Explain in detail positive and negative deviation
   • 5. A polymer sample has 4 different kinds of molar masses as 1.5 x 2.6x 3.5 x and 5 x present in ratio Calculate i) number average molecular weight and ii) weight average molecular weight
   • 6. Differentiate between linear polymer and branched polymer
3. Q3 Answer the following questions (any four) 1, Discuss general trends in physical and chemical properties of Nitrogen family elements 20 marks
   • 2. Discuss properties of hydrides of Nitrogen family elements
   • 3. Discuss preparation, properties, structure and uses of any three oxides of Nitrogen
   • 4. Discuss Czochralski pulling technique for single crystal growth
   • 5. Discuss the occurrence,structure and inertness of
   • 6. Discuss the structure and electron count in diborane and Tetraborane
4. Q4 Answer the following questions (any four) 20 marks
   • 1. What is tautomerisation? Give the mechanism of acid cataiysed enolization
   • 2. Explain the mechanism of Knoevengel reaction
   • 3. Explain mechanism and application of benzoin condensation reaction
   • 4. Explain the use of fol!owing reagents in of aldehyde and ketones
   • 5. How will you convert
   • i) Benzene into Acetophenone
   • ii) Benzaldehyde into Benzaldehyde sodium bisulphite
   • 6. reduction of aldehyde and ketone using Lithium Aluminium Hydride

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