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 question: [10]
i) The spin only magnetic moment of Cr3+ cation is _____.
(a) 3.742 BM
(b) 3.755 BM
(c) 3.873 BM
(d) 3.633 BM
ii) The linkage present in Lactose is _____.
(a) α, β-1, 2 – glycosidic linkage
(b) α-1, 4 – glycosidic linkage
(c) β-1, 4 – glycosidic linkage
(d) α-1, 4 – glycosidic linkage
iii) The product of the following reaction is
iv) The pH of 0.001 M HCI solution is ______.
(a) 10
(b) 3
(c) 2
(d) 11
v) The correct structure of complex having IUPAC name sodium hexanitrocobaltate (III) is
(a) Na_3\left[Co{\left(NO_2\right)}_5\right]
(b) Na_4\left[Co{\left(NO_2\right)}_6\right]
(c) Na_3\left[Co{\left(NO_2\right)}_6\right]
(d) Na_4\left[Co{\left(NO_2\right)}_5\right]
vi) The number of particles present in Face Centred Cubic Unit Cell is/are_____.
(a) 1
(b) 2
(c) 3
(d) 4
vii) The monomer used in preparation of teflon is _____.
(a) E Caprolactum
(b) Vinyl chloride
(c) Styrene
(d) tetrafluoroethene
viii) Among the following vinylic halide is____.
ix) The product of hydrolysis of propyne in the presence of 1% HgSO4 and 40% H2SO4 is___.
(a) methanal
(b) ethanal
(c) propanal
(d) propanone
x) If unit of rate constant is mol dm-3 S-1, the order of reaction would be_____.
(a) Zero
(b) 1
(c) 2
(d) 3
Q.2 Answer the following questions: [8]
i) Write the name of metal nanoparticle used to remove E.coli bacteria from water.
ii) Write the name of reduction product formed when ethyl cyanide is treated with sodium and alcohol.
iii) Complete the reaction:
iv) Calculate effective atomic number of \left[Co{\left(NH_3\right)}_6\right]^{3+} ion.
v) The compounds of Ti4+ ions are colourless due to ……..
vi) Write SI unit of molar conductivity.
vii) Write the sign convention of work done during expansion of gas.
viii) Write the condition of reserve osmosis.
Section-B
Attempt any EIGHT of the following questions: [16]
Q.3 Derive an expression for maximum work obtainable during isothermal reversible expansion of an ideal gas from initial volume(V1) to final volume (V2).
Q.4 What are interhalogen compounds? Write the chemical reaction, when chlorine reacts with dry slaked lime.
Q.5 What is nano material? Write the reaction involved in sol-gel process during hydrolysis.
Q.6 Write classification of protiens with an example.
Q.7 Calculate the time required to deposite 2.4 g of Cu, when 2-03 A of current pass through CuSO4 solution.
(At mass of Cu = 63.5 g.mol-1)
Q.8 Why amines are basic in nature? Among Dimethylamine (pKb = 3.27) and diethlylamine (pKb = 3.0), which one is more basic?
Q.9 Explain buffer action of sodium acetate-acetic acid buffer.
Q.10 Write preparation of (a) diethyl ether (b) ethyl cyanide from ethyl bromide.
Q.11 Henry’s constant for CH3Br(g) is 0.159 mol dm-3 bar-1 at 250C. Calculate its solubility in water at 250C, if its partial pressure is 0.164 bar.
Q.12 Write the structure and name of monometer of
(a) Nylon-6
(B) Natural rubber
Q.13 Define Lanthanide contraction. Write the balanced chemical equations when acidified K2Cr2O7 reacts with H2S.
Q.14 Derive the relationship between molar mass, density of the substance and unit cell edge length.
Section-C
Attempt any EIGHT of the following questions: [24]
Q.15 What is Osmotic pressure? How will you determine moral mass of solute from osmotic pressure?
Q.16 Write chemical reactions involved in:
(a) Rosenmund reduction.
(b) Gatterman Koch formylation.
(c) Cannizaro reaction of methanal.
Q.17 Calculate the standard enthalpy of combustion of methane, if the standard enthalpy of formation of methane, carbon dioxide and water are -74.8, -393.5 and -285.8 kJmol-1 respectively.
Q.18 What is the action of following on ethyl bromide?
(a) Silver Nitride
(b) Mg in dry ehter
(c) alcoholic sodium hydroxide
Q.19 For the reaction A + B ⟶ P.
If [B] is doubled at constant [A], the rate of reaction doubled. If [A] is triple and [B] is doubled, the rate of reaction increases by a factor of 6. Calculate the rate law equation.
Q.20 Arrange the following in the increasing order of the property mentioned:
(i) HOCI, HCIO2, HCIO3, HCIO4 (acidic strength)
(ii) MF, MCI, MBr, MI (ionic character)
(iii) HF, HCI, HBr, HI (thermal stability)
Q.21 Explain Wolf-Kishner reduction reaction. Write preparation of propanone by using ethanoyl choride and dimethyl cadmium.
Q.22 Write postulates of werner theory of co-ordination complexes. Write the name of a hexadentate ligand.
Q.23 Define electrochemical series and write its two applications.
Q.24 Identify ‘A’, ‘B’ and ‘C’ in following chain reaction and rewrite the chemical reactions:
Q.25 Define acids and bases according to Bronsted-Lowry theory. Derive relationship between pH and pOH.
Q.26 Write the preparation of potassium dichromate from chromite ore.
Section-D
Atttempt any THREE of the following questions: [12]
Q.27 Convert the following:
(i) acetaldehyde to isopropyl alcohol.
(ii) cumen to phenol.
(iii) anisole to phenol.
write two uses of neon.
Q.28 Define:
(i) Extensive and Intenstive properties
(ii) Isobaric and Adiabatic processes
What are enzymes?
Write the atomic numbers of transuranium elements.
Q.29 Predict the type of cubic lattice of a solid element having edge length of 400 pm and dentsity is 6.25 g/ml
(Atomic mass of element = 60)
Define: Nanoscience
Write chemical reaction for the preparation of polyacrylonitrile.
Q.30 Derive the relation between half life period and rate constant for first order reaction.
Write the net cell reaction during discharging of lead accumulator.
Draw the structure of peroxymonosulphuric acid.
Q.31 Mentioned the number of unpaired electrons and geometry of following complexes:
(i) [Ni (CI)4]2-
(ii) [Ni (CN)4]2-
Convert the following:
(a) Ethanenitrile into ethanal
(b) Cyclohexane into adipic acid
