BSc Sem V 2023 2024 Oct 2024 CHEMISTRY ANALYTICAL & ORGANIC CHEMISTRY PAPER SUBJECT CODE Question Paper - Mumbai University | munotes

Questions asked in this paper

• (2) Figures to the right indicate full marks

1. Q1 Attempt ANY FOUR of the following
   • A) What are pericyclic reactions? Describe their characteristics. 5 Explain Cheletropic reactions with a suitable example
   • B) Complete the following reaction and explain its mechanism. 5 Suggest one method to push the reaction in the forward direction
   • C) Distinguish between the following:
   • 1) Nucleophilicity and Basicity 3 li) Homolytic and Heterolytic fission 2
   • D) What is NGP? Give an example of NGP in nucleophilic 5 substitution reactions. Explain its mechanism
   • E) Explain phosphorescence and vibrational relaxation using aneatly 5
   • F) Define Triplet State. Explain the photochemical reduction of 5
2. Q2 Attempt any four of the following
   • A) Explain the following terms with examples:
   • b) Centre of symmetry 2
   • B) What do you mean by chirality. Explain it for Cummulenes and 5
   • C) Give the detailed synthesis and uses of Endosulphan 5
   • D) What are biopesticides? Explain the use of Neem oil as 5
   • E) a) Explain why pyridine-N-oxide undergoes electrophilic substitution 3 at 2 and 4 position
   • b) Draw the resonating structure of pyridine-N-oxide. 2
   • F) Write the Bischler Napieralski synthesis for isoquinoline. 05 Give the nitration reaction of isoquinoline Paper Subject Code: 24213 Chemistry: Analytical Chemistry and Or ganic Chemistry (3 Units)
3. Q3 A) Fill in the blanks with the most correct option (Any Five) 5 marks
   • b) Reaction intermediate is
   • c) Photochemical cleavage of carbonyl compounds to form alkane and carbon monoxide is called . reaction
   • d) . are electron deficient species that attack at positions of high electron density,
   • 1) electrophile 11) acid
   • e) is due to restricted rotation around carbon-carbon
   • f) of Pyridine-N-oxide takes place position
   • i) 1 ii) 2
   • iii) 3 iv) 4
   • g) Which alcohol is used in Skraups synthesis ?
   • h) Auxins are
4. Q3 B) State whether the following statements are TRUE or FALSE 5 marks
   • a) Diel’s Alder is a 4+2 2 cycloaddition reaction
   • b) Acid catalysed hydrolysis of esters is called saponification
   • c) Electronic transition from is a forbidden transition
   • d) In isoquinoline electrophilic substitution takes place at 5 and 8
   • e) Dipole moment of pyridine-N-oxide is less than pyridine
   • f) Centre of inversion is also known as rotation-reflection axis
   • g) Karanja oil is a bio-pesticide Paper Subject Code: 24213 Chemistry: Analytical Chemistry and Or ganic Chemistry (3 Units)
5. Q4 Attempt any four of the following 20 marks
   • A) What is the importance of quality in Industry? 05
   • B) Explain the differences between quality control and quality 05
   • C) Find out the Normality and Molarity of NaOH solution, when 0.2 grams of NaOH dissolved in 500 cm? of
   • D) 2.0 grams of glucose are dissolved in 100 grams of water. 05 calculate the Molality and Mole fraction of glucose in the Given (Atomic weight of carbon=12, hydrogen=1.0, oxygen
   • E) What is purpose of sampling? Explain the sampling of 05 flowing liquids by using multiple tube sampler
   • F) Name different methods used for sampling of stack gases 05 and describe any one of them
6. Q5 Attempt any four of the following 20 marks
   • A) Write short notes on---- 05
   • a) Kinetic Masking
   • B) What are different types of EDTA titrations? Explain any 05 two of them in brief
   • C) 10.0 of Fe(II) solution is titrated with 0.02M 05 at in acidic medium. Calculate the potential
   • a) 5.0 ml of titrant is added
   • b) 10.0 ml of titrant is added Write the equation
   • D) What are metal -ion indicator? Give the properties of good 05 Paper Subject Code: 24213 Chemistry: Analytical Chemistry and Or ganic Chemistry (3 Units)
   • E) 10,0 ml of 0.1M Fe+2 is titrated with 0.1M Ce+4 05 presence of sulphuric acid. Calculate electrode potential
   • a) 2.0 ml of titrant 0.1M Ce (IV) has been added
   • b) 5.0 ml of titrant 0.1M Ce (IV) has been added
   • F) Give the role of indicator in redox titrations,explain the use 05 of diphenyl amine in redox titrations
7. Q6 A) Fill in the blanks with correct alternative give in bracket 5 marks
   • a) A certified reference material is
   • b) If the Molecular mass of a dibasic acid is M, its equivalent weight will be
   • c) Auger sampler is used for sampling of ---------solids
   • d) The sum of mole fraction of all the components in a solution
   • e) used for high precision work.it will contain trace
   • f) Milligrams per litre is also known as
   • g) In sampling of solids, bulk ratio should be as -------as
   • h) Number of moles per litre of solution is known as
8. Q6 B) State true or false (Any Five) 5 marks
   • a) Ferroin is an indicator used in redox titration
   • b) is used in complexometric titration as a complexing
   • c) Oxidation takes place at anode in electrochemical cell
   • d) Formaldehyde is used as an masking agent in
   • e) EDTA titrations are carried out at presence of pH10
   • f) Titration curve for and is symmetrical
   • g) Chelates increases stability of complexes

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