Name of the Organisation : Sri Sathya Sai Institute of Higher Learning
Exam : SSSIHL Postgraduate Programme Admission Test
Degree : Postgraduate Programme
Subject : M.Sc. Chemistry
Document Type : Model Question Paper
Website : https://www.sssihl.edu.in/
Download Model Question Paper : https://www.pdfquestion.in/uploads/25150-Chem.pdf
SSSIHL Admission Test M.Sc. Chemistry Question Paper
** Click on any of the above links to download the Postgraduate Programme M.Sc. Chemistry Question Paper . You will be able to view and save the file in PDF format on your computer.
Related : Sri Sathya Sai Institute of Higher Learning Postgraduate Admission Test M.Sc. Physics Model Question Paper : www.pdfquestion.in/25137.html
Important Instructions
i) Answer the following questions in the space provided.
ii) Please write your Application Id and name on the Answer sheets.
iii) Choose the correct answer and WRITE IN CAPITAL LETTER viz., A, B, C, D or E for the multiple choice questions. Each MCQ carries one mark and there will be negative marking for each wrong answer.
iv) Write detailed answer as required for other questions.
Sample Questions
Section-A
Answer the following questions. Each question carries ONE mark: (25 x 1 = 25 marks)
1. Humphries series in the H-spectrum arises when electrons jump from higher energy level to
a) n = 2
b) n = 6
c) n = 4
d) n = 5
e) n = 6
2. The ionic species of highest bond order is
a) 2O
b) 2O
c) 2O
d) 22O
e) O23
3. Which of the following salts in water forms acidic solution?
a) NH4Br
b) Na2CO3
c) KI
d) K3PO4 e)K2CO3
4. The most suitable indicator for the titration of 0.2M CH3COOH (Ka = 1.8 x 105) with 0.2 M NaOH would be
a) methyl orange
b) thymol blue
c) methyl red
d) bromophenol blue
e) Phenol red
6. Which of the following mixed systems does not function as a buffer solution?
a) Equal volumes of 0.5 M CH3COOH(aq) and 0.3M NaOH(aq).
b) Equal volumes of 0.1 M C6H5COOH(aq) and 0.1M C6H5COONa(aq).
c) Equal volumes of 0.1 M HN02(aq) and 0.1M NaNO2(aq).
d) Equal volumes of 0.1 M NH3(aq) and 0.1M HCl(aq).
e) Equal volumes of 0.2 M NH3(aq) and 0.2M HCl(aq).
7. The ionic strength of the solution containing 0.02M CuSO4 (aq) and 0.01M CaCl2 (aq) is
a) 0.03
b) 0.11
c) 0.015
d) 0.06
e) 0.08
8. Which of the following sets is NOT a pair of resonance structures?
a) CH CH O H CH CH OH 3 3
b) CH2 CH2 CH2 CH2 CH2 CH2
e) Ph-OH ?> PhO-
9. The activity of A in a mixture is 0.13 at the molefraction, x = 0.2 . The activity coefficient of A will be
a) 0.026 b) 0.65 c) 1.54 d) 0.13 e) 0.04
10. Calculate the ratio of molarities of 3 O HC CO required to achieve buffering at pH = 9.25. The pKa 2 of 3 2 CO H is 10.25.
a) 1.0
b) 0.1
c) 10
d) 0.5
e) 0.6
13. An example of a Redox Indicator is
a) Thymolphthalein
b) Phenolphthalein
c) Feroin
d) Methyl Red
e) Methylene blue
14. The hybridisation involved in t he formation of ? 3 I
a) dsp2
b) sp3
c) sp3d
d) d2sp3
e) sp2
15. The dipole moment of HF bond is 1.91 D and the bond length is 92 pm. The percentage ionic character of the bond will be
a) 12
b) 43
c) 17
d) 46
e) 20
16. Among the following compounds identify a thermochromic compound.
a) S4 N4
b) I2
c) Na2 S2 O3
d) NH4 Cl
e) NaCl
17. Which one of the following ions is a pseudohalide ion?
a) Br –
b) CN –
c) ICl2 –
d) S 2–
e) O2–
18. The following compound under anhydrous conditions is covalent in nature.
a) AlCl3
b) PbCl2
c) BiCl3
d) TlCl
e) NaBr
19. The expansion work done when 36 g of water is electrolyzed under constant pressure at 25 0C is
a) –10kJ
b) –5kJ
c) –2.5kJ
d) –7.4kJ
e) –8.4kJ
20. Among the following identify a covalent like carbide
a) CaC2
b) SiC
c) Be2 C
d) Al4 C3
e) SrC2
21. Which one of the following pentahalides is not known?
a) PCl5
b) SbCl5
c) NCl5
d) PBr5
e) PF5
22. The oxoacid of sulphur which behaves as a reducing agent is
a) Sulphuric acid
b) Caro’s acid
c) Mashall’s acid
d) Thiosulphuric acid
e) Oleum
23. Kolbe– Schmitt reaction is the reaction between
a) phenol and formaldehyde in presence of alkali
b) phenol and carbon dioxide in presence of alkali
c) phenol and chloroform in presence of alkali
d) phenol and carbon tetrachloride in presence of alkali
e) None of the above
24. Which one of the following solutions satisfies Raoult’s law?
a) chloroform and acetone
b) carbon disulphide and acetone
c) benzene and toluene
d) cyclohexane and benzene
e) benzene and water
25. The molar enthalpy of vaporization of benzene at its boiling point (353.25 K) is 30.8 kJmol–1. The molar internal energy change is
a) +25.8kJmol–1
b) +27.9kJmol–1
c) +35.8kJmol–1
d) –25.8kJmol–1
e) –45.8kJmol–1
Section-B
Answer any six questions. Each question carries FIVE marks :
1. An organic compound CH4O(A) on oxidation with CrO3 in.pyridine gives(B), but oxidation of (A)with H2 CrO4 gives (C). (B) on treatment with NaOH followed by acidification gives (A) and (C). Identify the compounds (A), (B) and (C).
2. Distinguish between inter and intramolecular–H–bonding. Why is ortho-nitrophenol steam volatile and para-nitrophenol is NOT ?
3. Use Carnot cycle to prove that qh / qc = – Th / Tc
4. Sketch and explain the pH curve for the titration of CH3COOH with NaOH giving appropriate expression for pH at various stages of titration.
5. Give the salient features of SN2 and SN1 reactions with suitable examples.
6. How does HSAB concept explain the stability and formation of a compound ? Give reason(s) for the existence of (Ca2+ , Mg2+ ) ions as carbonates in nature and (Hg2+ , Cu+ ) as sulphides .
7. Write a general expression for Debye–Huckel–Onsager equation. Based on this, account for the variation of molar conductivity with concentration for an aqueous solution of NaCl.
8. How is the series of aldoses ascended and descended? Explain with suitable examples.
Section-C
Answer any one question. Each question carries TWENTY marks : 20 marks
9. a) Write a general expression for Debye–Huckel–Onsager equation. Based on this, account for the variation of molar conductivity with concentration for an aqueous solution of NaCl.
b) Explain mutarotation. Propose a mechanism. What does this convey about the structure of sugars? Explain with an example.
c) What is disintegration series? Mention the different types of disintegration series.
d) Draw the MO energy diagram for ? NO . Calculate bond order and predict its magnetic behaviour. 4×5=20 marks
(OR)
10. a) What is Fajan’s rule ? Why is the melting point and electrical conductivity in the Molten state of NaCl greater than that of AlCl3 .
b) Differentiate between chemisorption and physisorption
c) What is selective precipitation? Explain in detail as to how selective precipitation of the ions from solution containing Cu2+, Al 3+ and Zn2+ ions is achieved.
d) Predict the product(s) obtained when following dicarboxylic acids are subjected to thermal treatment :
i) Oxalic acid ii) Malonic acid iii) Succinic acid iv) Adipic acid v) Pimelic acid. 4×5=20 marks