BSc Chemistry SEM I ATKT CHEMISTRY PAPER II Question Paper - Mumbai University | munotes

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1. Q2 Answers to the same questions must be written together
2. Q3 Figures to the right indicate full marks
3. Q4 The use of log table/ non programmable calculator is allowed
4. Q1 (A) Select the correct option and complete the following statements (Any 12 marks
5. Q1 Which of the following rate law of reactant and second order?
   • a) Rate =k [A] [B]?
   • b) Rate = k[A] [B]
   • c) Rate =k li) The half life time of a second order reaction is to the initial
   • a) directly proportional
   • b) independent
   • c) inversely proportional iil) The unit of rate constant of a first order reaction
   • a) only time
   • b) time and concentration
   • c) time and square of concentration
   • iv) In general, the viscosity with temperature
   • a). decreases b) increases c) remains the same
   • v) Increasing molecular mass of a liquid, the viscosity
   • a) increases b) decreases c) no effect V1) Among the following has maximum viscosity
   • vii) Outer electronic configuration of group is Vill) Oxidation state of sulphur in is
   • ix) Which one of the following best defines the word
   • a) Different structural forms of an element with same chemical
   • b) Elements that possess properties intermediate between those of metals and non-metals
   • c) The different phases (solid, liquid or gas) of a substance
6. Q10 Number of electrons in the valence shell of the O? ion X1) Which one of the following shows catenation property? Among the following, can cause global warming
   • a) Ho b) c) CO2 Xiil) The isomer which rotates the plane of plane polarized light in clockwise direction is isomer XIV) Molecule with one asymmetric carbon has optical isomers XV) n- butane has conformations due to rotations about C2-C3 XVi) In Z-E nomenclature, if high priority groups are on the same side of the double bond , then the isomer is called as isomer Absolute configuration of (+)Tartaric acid can be detected using The process of separating a racemic mixture into its component enantiomers is called
   • (B) State whether the following statements are True or False 3
7. Q1 The rate constant of a reaction is the change in concentration of the any of the reactant per unit time li) Poise is the unit of Viscosity ili) Group 13 to 18 elements are known as s block elements
   • iv) CO produces toxic effect on human being due to its irreversible reaction with haemoglobin in the blood
   • v) Optical rotation is measured using polarimeter V1) Horizontal lines in Fischer projection formula represents bonds that project above the plane of paper
   • (C) Match the following columns (Any Five) 5
   • (i) Example of a (a) Argon
8. Q2 Attempt any Four of the following
   • (A) Define i) order ii) molecularity iii) rate and iv) half life time of areaction 5
   • (B) A reaction Products follows a first order reaction with k =2.0 x the concentration of A remaining after 100 seconds, if the initial concentration of A is 1.2 mol/L 5
   • (C) Derive the integrated rate equation of a second order reaction having equal concentration of the reactants 5
   • (D) Define Viscosity of a liquid. How is it determined using a Ostwald’s 5
   • (E) In a Stalagmometer experiment, the same volume of organic liquid and water formed 30 and 25 drops respectively. If the surface tension of water 1s 7.2 x 10? Calculate surface tension of organic liquid. The density of organic liquid is 0.85 x kg and that of water is kg 5
   • (F) What are Liquid Crystals ? Discuss the classification of liquid crystals. 5
9. Q3 Attempt any Four of the following
   • (A) What is diagonal relationship between elements? Explain it with respect to beryllium and aluminium 5
   • (B) How does nitrogen differ from other group 15 elements? 5
   • (C) How is sodium carbonate prepared? State any two each of its properties 5
   • (D) Formulate the hydroxides of alkali metals and compare their basic 5
   • (E) Give important applications of quick lime (any 5
   • (F) What are carbides ? How are alkali metal carbides prepared? 5
10. Q4 Attempt any Four of the following
    • (A) Explain the terms with suitable examples: 5
    • (B) 1) between Enantiomers and Diastereoisomers. li) Assign R or S descriptors (2) 3
    • (C) 1) Give the structures of the following 2
    • a) glyceraldehyde
    • b) Cis -2 butene il) Identify chiral and achiral molecules (3)
    • (D) Draw the conformations of n-Butane for rotation about bond and discuss their relative stabilities 5
    • (E) Convert the following molecules from Fisher projection formula to 5
    • (F) 1) What are the characteristics of Meso isomers? Discuss the causes of geometrical isomerism (2) 3
11. Q5 Attempt any Four of the following
    • (A) Explain how Graphical method is used to determine the first order and second order of a reaction 5
    • (B) What do you mean by an optically active compound? The refractive index of a liquid at is 1.6 and its density is 0.87 Find the molar refraction of the liquid. (Molecular mass of the liquid is 78) 5
    • (C) Name any two oxides of Carbon. Write any two sources and control measures for each oxides of carbon 5
    • (D) Write a brief note on Acid Rain. 5
    • (E) What is conformational analysis? Draw the various conformations of Ethane using Saw horse and Newman projection formula 5
    • (F) Explain optical isomerism in Lactic acid. 5

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