BSc Chemistry SEM III 2022 2023 Oct 2023 CHEMISTRY II Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 A. Fill in the blanks with suitble option.(anyTWELVE) 12 marks
   • 1) Reaction in which final product is formed by one or more steps is
   • a) Reversible
   • b) Irreversible
   • c) Consecutive
   • d) Parallel
   • 2) According to Arrhenius theory, as temperature increases the rate of
   • a) Decreases
   • b) Increases
   • c) Remains same
   • 3) Which of the following condition is not satisfied by an ideal solution?
   • a) AH mixing =0
   • b) AV mixing = 0
   • c) Raoult’s law is obey
   • d) Formation of azeotropic mixture
   • 4) Which of the following is example of completely miscible liquid at room
   • a) Alcohol and water
   • b) Phenol and water
   • c) and water
   • d) Oil and water
   • 5) When a chemical reaction obeys collision theory,then the probability factor is
   • 6) The process of separating a substance from its aqueous solution by shaking it with suitable and immiscible solvents is called
   • a) Raoult's law
   • 7) Second most abundant element of carbon
   • a) Carbon
   • c) Germanium
   • d) Lead
   • 8) Formula for sillica is
   • 9) Synthesis of ammonia takes place VCD/ SYBSC - SEM III CHEMISTRY- II 100MARKS 3HRS
   • 10) Laughing gas
   • a) NO
   • 11) Multiple bonding of nitrogen is due to it’s
   • a) Big size
   • b) Volume
   • c) Volume and density
   • d) Small size
   • 12) Number of electrons involved in bonding of is
   • 13) The hybridizations of C-atom and O-atom in group
   • 14) The hydration of an unsymmetrical alkyne follows
   • b) Markonikovs rule
   • c) Phase rule
   • d) Sulphonation
   • 15) The number of bonds in nitrogen molecule
   • a) one sigma and one pi
   • b) one sigma and two pi
   • c) two sigma and one pi
   • d) three sigma
   • 16) When Grignard reagent react with a ketone formed
   • a) Tertiary alcohol
   • b) Primary alcohol
   • c) Secondary alcohol
   • d) Aldehyde
   • 17) Which of the following is the Rosenmund
   • 18) The isomers of compound differing in the position of one atom and a double bond are
   • B. State wether following statement is true or false 3
   • a) For solution to undergo steam distillation the two liquids must be immiscible with
   • c) Friedel Craft acylation carried out in presence of acid anhydride and
   • C. Match the following. 5
   • e) Aluminium v) 31
2. Q2 Answer the following: (Any four) 20 marks
   • a) State and derive Raoult’s law
   • b) Explain in detail Phenol-water system
   • c) Explain positive and negative deviation from Raoult's law
   • d) Explain reversible reaction and consecutive reaction with suitable example
   • e) Explain the Lindemann's unimolecular theory of reaction rate
   • f) isa first order reaction. Rate of the reaction is double when temperature rises from to Find energy of activation. (R = 8.314
3. Q3 Answer the following: (Any Four) 20 marks
   • a) Explain the structure and bonding in diborane
   • b) Write the short note on preparation and structure of SiCl4
   • c) Name oxides of nitrogen .Explain preparation,properties and structure of two oxides
   • d) Explain the back bonding in BF; molecules with suitable diagram
   • e) Give the electronic configuration of boron family elements
   • f) Explain the following
   • i. NH3 is highly soluble in water but other hydrides of nitrogen family are not
   • ii. Reducing characters of hydrides nitogen family increases down the group
4. Q4 Answer the following: (Any Four) 20 marks
   • a) Explain Benzoin condensation reaction
   • b) What is Rosenmund reduction reaction? Explain with example
   • c) Give mechanism of nucleophilic addition to carbonyl compounds
   • d) Explain structure and reactivity of carbonyl compounds
   • e) What is enolization? Give the mechanism of acid-catalyzed enolization
   • f) Explain Cannizzaro’s reaction with mechanism
5. Q5 Answer the following: (Any Four) 20 marks
   • a) State the important postulates of collision theory
   • b) Explain Knoevengel reaction with mechanism
   • c) Answer following questions:
   • i. Differentiate between ideal solution and non ideal solution
   • ii. The vapour pressure of alcohol at 298 kelvin is 220.7 X 10? Nm”, It forms a solution with ethyl alcohol and its mole fraction is 0.304. Calculate the partial vapour pressure of methyl alcohol if its obey Raoult’s law
   • d) Name the hydrides of nitrogen in group 14 and discuss their properties
   • e) Explain extraction of germanium by winkler’s method
   • f) Complete the following reaction and name the product

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