BSc Chemistry SEM IV 2018 19 Apr 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
• 2. Figures to the right indicate full marks

1. Q3 Use of log-table/non-programmable calculator is allowed
2. Q4 Answers for the same question as far as possible should be written together
3. Q1 Select the correct option and complete the following sentences. (any twelve) 12 marks
   • (i) Substances with higher reduction potentials are strong
   • (ii) All metals lying above in electrochemical series can liberate H2 gas by reaction with
   • (iii) In galvanic cell, electrons are given off electrode
   • (a) by anode (b) at cathode (c) by platinum
   • (iv) A system with zero degrees of freedom is known as
   • (v) The eutectic temperature of lead silver system is
   • (vi) All metals lying above hydrogen in electrochemical series can liberate Hz gas by
   • (a) (c) covalent compounds
   • (vii) In first transition series element has its 3d level exactly half filled Solution containing hydrated is colour
   • (ix) among following shows ferromagnetism
   • (a) Ti (b)V Ni
   • (x) The complex has structure
   • (xi) salts give blue colour with
   • (xii) The molecular formula of chromium carbonyl
   • (xiii) presence of electron withdrawing group strength of carboxylic acid
   • (xiv) Aromatic carboxylic acid on heating with soda lime forms
   • (xv) Carboxylic acid is prepared from grignard reagent by action of (Xvi) are salts of sulfonic acids Naphthalene on reaction with concentrated at C forms
   • (a) sulphonic acid Nitro Benzene on reaction with oleum forms
   • (B) State whether the following statements are true or false. (any three) 3
   • (i) Any uni-univalent type of salt can be used in preparation of salt bridge
   • (ii) Aqueous salt solution is an classic example of single phase system
   • (iii) With the increase in covalent character, acidic character of transition compound
   • (iv) Ionisation isomerism is a form of stereoisomerism in coordination compounds
   • (v) Acetic acid is stronger than chloro acetic acid
   • (vi) In IPSO substitution — SO3H group is replaced by NO2 group
   • (C) Match the column. (any five) 5
   • (iv) Mo (d) Half filled state
   • (vi) Reaction of different esters (f) To minimize liquid junction potential
   • (h) dP AH
4. Q2 Attempt any four of the following
   • (A) Differentiate between concentration cells and chemical cells. 05
   • (B) Explain any two applications of Nernst equation in the study of galvanic cells? 05
   • (C) The emf of acell Zn | CuSO,|Cu at 25 C is 0-3 V and the temperature coefficient of emf 05 is -1-4x V per degree. Calculate the heat of reaction per mole for the reaction that taking place inside the cell
   • (D) Justify the number of phases and components present in the following system — 05
   • (F) The boiling point of a given solvent is 352-2K at 1-013 x Calculate the boiling point 05 of the given solvent at 0-63 x N (molar heat of vaporization of a solvent at 352.2 K is
5. Q3 Attempt any four of the following
   • (A) Explain the terms with suitable examples 5
   • (i). Primary and secondary valency Geometrical isomerism
   • (B) Name the important oxides of titanium and vanadium. Give properties of any two oxides of 05
   • (C) Explain in brief different evidences for the formation of co-ordination compounds. 05
   • (D) on the colour property of transition metals. 05
   • (E) Give an account of Werner’s theory of coordination compounds. 05
   • (F) Write on” Variable oxidation states of transition elements’ 05
6. Q4 Attempt any four of the following How will you prepare —
   • i) benzamide from benzoic acid 02 benzoyl chloride from benzoic acid?
   • b) Explain Claisen condensation with mechanism. 03
   • (B) a) Give preparation of Benzoic acid from- 03
   • b) Explain oxidation of 1-propanol. 02
   • (C) a) Explain sulphonation of naphthalene at different temperatures. 03
   • b) How will you convert :
   • a) bromobenzene to benzoic acid
   • b) salicylic acid to methyl salicylate? 02
   • (D) a) What is IPSO substitution? Explain with example. 03
   • b) What is decarboxylation? Give an example
   • (E) a) What is the effect of substituents on acid strength of aliphatic acids? 04
   • b) Draw structure of butanoic acid. 01
   • (F) Discuss HVZ reaction giving mechanism and applications. 05
7. Q5 Attempt any four of the following
   • (A) What are the advantages and disadvantages. of quinhydrone electrode in the determination of 05
   • (B) Ether boils at 306K at 1.00 x Pa pressure. At what temperature will it boil at a pressure of 05 9.85 x Pa? Given that the molar enthalpy of vaporization of ether is 2.74 x 10* J mol’
   • (C) Represent the electronic configuration of 3d transition elements and mention the names of 05 elements with special stability
   • (D) What are the different rules for nomenclature of coordination compounds? Explain with 05
   • (E) Explain following reactions with example. 05
8. Q1 Fischer’s Esterification
   • (F) Complete the following reactions-- 05

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