Time: 3 Hrs.
Max. Marks: 80
General instructions:
- Section A:
Q. 1 contains Ten multiple choice type ofquestions, each carrying One marks.
Q. 2 contains Eight very short answer type questions, each carrying one mark. - Section B:
Q. 3 to Q. 14 contain Twelve short answer type questions, each carryingTwo marks. (Attempt any Eight) - Section C:
Q. 15 to Q. 26 contain Twelve short answer type questions, each carrying Three marks. (Attempt any Eight) - Section D:
Q. 27 to Q. 31 contain Five long answer type questions, each carrying Four marks.(Attempt any Three). - Use of log table is allowed. Use of calculator is not allowed.
- Figures to the right indicate full marks.
- For each multiple choice type of question, it is mandatory to write the correct answer along with its alphabet, e.g. (a)……/ (b)……./ (c)………etc. No marks shall be given, if ONLY the correct answer or the alphabet of correct answer is written. Only the first attempt will be considered for evaluation.
- Start answer to each section on a new page.
- Given :
i) R=8.314 J.K-1. mol-1
ii)NA=6.022 x 1023 m/s
iii) F=96500 C
SECTION-A
Q.1 Select and write the correct answer for the following multiple choice type of questions: (1M each: 10M)
i.The relation between radius of sphere and edge length in body centered cubic lattice is given by formula:
(a) \sqrt{3}r=4a
(b) r=\frac{\sqrt{3}}{a}\times 4
(c) r=\frac{\sqrt{3}}{4}a
(d) r=\frac{\sqrt{2}}{4}\times a
ii. The pH of weak monoacidic base is 11.2 , its OH– ion concentration is:
(a) 1.585 x 10-3 mol dm-3
(b) 3.010 x 10-11 mol dm-3
(c) 3.010 x 10-3 mol dm-3
(d) 1.585 x 10-11 mol dm-3
iii.Which of the following correctly represents integrated rate law equation for a first order reaction in gas phase:
(a) k=\frac{2.303}{t}\times\; log_{10}\frac{P{i}}{P_{i}-P}
(b) k=\frac{2.303}{t}\times\; log_ {10}\frac{P{i}}{2P_{i}-P}
(c) k=\frac{2.303}{t}\times\; log_ {10}\frac{2P{i}}{P_{i}-P}
(d) k=\frac{2.303}{t}\times\; log _{10}\frac{P{i}-P}{2P_{i}}
iv.The spin only magnetic moment of \mathrm{Mn}^{2+} ion is \qquad
(a) 4.901 BM
(b) 5.916 bM
(c) 3.873 BM
(d) 2.846 BM
v. The correct formula of a complex having IUPAC name Tetraamminedibromoplatinum (IV) bromide is \qquad .
(a) [PtBr(NH_{3})_{4}]Br_{2}
(b) [PtBr_{2}(NH_{3})_{4}]Br
(c) [PtBr_{2}(NH_{3})_{4}]Br_{2}
(d) [PtBr(NH_{3})_{4}]Br
vi. The allylic halide, among the following is \qquad
(a) 
(b) CH2=CH-X
(c) 
(d) CH2=CH-CH2-X
vii. The product of following reaction is. 
(a) CH3-CH2-CH2-CH2-CH2-OH
(b) CH3-CH=CH-CH2-CH2-OH
(c) CH3-CH2-CH2-CH2-COOH
(d) CH3-CH=CH-CH2-COOH
viii. Ozonolysis of 2, 3 dimethyl but-2-ene, followed by decomposition by Zn dust and water gives
(a)acetaldehyde
(b) propionaldehyde and acetone
(c) acetone
(d)acetaldehyde and butyraldehyde
ix.The glycosidic linkage present in maltose is \qquad .
(a)\alpha, \beta-1,2-glycosidic linkage
(b) \alpha-1,4-glycosidic linkage
(c) \quad \beta-1, 4-glycosidic linkage
(d) \quad \alpha-1,6-glycosidic linkage
x. The monomer of natural rubber is ———– .
(a) Isoprene
(b) Acrylonitrile
(c) \varepsilon-Caprolactam
(d) Tetrafluoroethylene
Q.2. Answer the following questions: (1M each: 4M)
i. Write the name of the technique used to know geometry of nanoparticles.
ii. Write the name of the product formed by the action of \mathrm{LiAlH}_{4} / ether on acetamide.
iii. Write the structure of the product formed when chlorobenzene is treated with sodium metal in the presence of dry ether.
iv. Write the chemical composition of cryolite.
v. Write the name of platinum complex used in the treatment of cancer.
vi. Write the SI unit of cryoscopic constant.
vii. Write the correct condition for spontaneity in terms of Gibbs energy.
viii. Calculate molar conductivity for 0.5 M BaCl2 if its conductivity at 298 K is 0.01 \Omega^{-1} \mathrm{~cm}^{-1}.
SECTION-B
Attempt any EIGHT of the following questions: (2M each: 16M)
Q.3.Distinguish between lanthanides and actinides.
Q.4. Calculate the mole fraction of solute, if the vapour pressure of pure benezene at certain temperature is 640 mmHg and vapour pressure of solution of a solute in benzene is 600 mmHg .
Q.5. Define: Green chemistry. Write two advantages of nanoparticle and nanotechnology.
Q.6. Explain the following terms:
i. Substitutional impurity defect
ii. Interstitial impurity defect
Q.7.Write the chemical reactions for the following:
i. Chlorobenzene is heated with fuming H2SO4
ii. Ethyl bromide is heated with silver acetate
Q.8.Define : Acidic buffer solution. Write the relationship between solubility and solubility product for \mathrm{PbI}_{2}.
Q.9. What is the action of the following reagents on ethyl amine
i. Chloroform and caustic potash
ii. Nitrous acid
Q.10. Calculate standard Gibbs energy change at 25^{\circ} \mathrm{C} for the cell reaction
\mathrm{Cd}_{(\mathrm{s})}+\mathrm{Sn}_{\text {(aq) }}^{2+} \longrightarrow \mathrm{Cd}_{(\mathrm{aq})}^{2+}+\mathrm{Sn}_{(\mathrm{s})} \mathrm{E}_{\mathrm{cd}}^{\mathrm{o}}=-0.403 \mathrm{~V}, \mathrm{E}_{\mathrm{Sn}}^{\mathrm{o}}=-0.136 \mathrm{~V}Q.11. Write chemical reaction for the preparation of glucose from sucrose. Write structure of D-ribose.
Q.12.Define Extensive property. Calculate the work done during the expansion of 2 moles of an ideal gas from 10 \mathrm{dm}^{3} to 20 \mathrm{dm}^{3} at 298 K in vacuum.
Q.13. Write the reactions for the formation of nylon 6,6 polymer.
Q.14. Draw structures of the following compounds:
i. chloric acid
ii. peroxy disulphuric acid
SECTION-C
Attempt any EIGHT of the following questions: (3M each: 24M)
Q.15. Define Osmosis.
How will you determine molar mass of non volatile solute by elevation of boiling point?
Q.16. Convert the following:
i. Ethyl alcohol into ethyl acetate
ii. Phenol into benzene
iii. Diethyl ether into ethyl chloride
Q.17. A weak monobasic acid is 10 \% dissociated in 0.05 M solution.
What is percent dissociation in 0.15 M solution?
Q.18. Explain dehydrohalogenation reaction of 2-chlorobutane. Write use and environmental effect of CFC.
Q.19.2000 mmol of an ideal gas expanded isothermally and reversibly from 20 L to 30 L at 300 K , calculate the work done in the process \left(\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}\right).
Q.20. What are interstitial compounds? Give the classification of alloys with examples.
Q.21. Draw labelled diagram of H2-O2 fuel cell. Write two applications of fuel cell.
Q.22. Explain formation of \left[\mathrm{CoF}_{6}\right]^{3-} complex with respect to
i. Hybridisation
ii. Magnetic properties
iii. Inner / outer complex
iv. Geometry
Q.23. What is Pseudo first order reaction? Derive integrated rate law equation for zero order reaction.
Q.24. Explain Aldol condensation of ethanal.
Q.25. Explain anomalous behaviour of oxygen in group 16 with respect to:
i. Atomicity
ii. Magnetic property
iii. Oxidation state
Q.26. Write chemical reactions for the following conversions:
i. Acetic acid into acetic anhydride
ii. Acetic acid into ethyl alcohol
Write IUPAC name and structure of methylphenylamine.
SECTION-D
Attempt any THREE of the following questions: (4M each: 12M)
Q.27.Show that, time required for 99.9% completion of a first order reaction is three times the time required for 90% completion.
Give electronic configuration of \mathrm{Gd}(\mathrm{Z}=64).
Write the name of nano structured material used in car tyres to increase the life of tyres.
Q.28. Derive relationship between \Delta \mathrm{H} and \Delta \mathrm{U} for gaseous reaction.
Define: Vulcanization
What is peptide bond?
Q.29.Silver crystallizes in fcc structure. If edge length of unit cell is 400 pm , calculate density of silver (Atomic mass of \mathrm{Ag}=108 ).
ii. Write a note on Haloform reaction.
Q.30. i. Define: Distereoisomers
ii. Give cis and trans isomers of
\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}What is reference electrode?
Give reason: Bleaching action of ozone is also called dry bleach.
Q.31.Write Dow process for preparation of Phenol. What is the action of bromine water on phenol?
Give reason: Group 16^{\text {th }} elements have lower ionisation enthalpy compared to group 15^{\text {th }} elements.
Write two uses of dioxygen.
