univ.tifr.res.in Graduate School Admissions Exam GS Chemistry – Y Question Paper 2017 : Tata Institute of Fundamental Research

Name of the Centre :Tata Institute of Fundamental Research
Document type : Previous Question Papers
Name Of The Exam : GS Graduate School Admissions Exam
Name Of The Subject : Chemistry – Y

Website : http://univ.tifr.res.in/admissions/
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GS 2017 Chemistry – Y :  https://www.pdfquestion.in/uploads/13101-GS2017CHM_Y.pdf
GS 2016 Chemistry – Y : https://www.pdfquestion.in/uploads/13101-GS2016CHM_Y.pdf
GS 2015 Chemistry – Y : https://www.pdfquestion.in/uploads/13101-GS2015CHM_Y.pdf
GS 2014 Chemistry – Y : https://www.pdfquestion.in/uploads/13101-GS2014CHM_Y.pdf
GS 2013 Chemistry – Y : https://www.pdfquestion.in/uploads/13101-GS2013CHM_Y.pdf
GS 2012 Chemistry – Y : https://www.pdfquestion.in/uploads/13101-GS2012CHM_Y.pdf
GS 2011 Chemistry – Y : https://www.pdfquestion.in/uploads/13101-GS2011Che-y.pdf

GS 2017 Chemistry – Y Question Paper :

Duration : Three hours (3 hours)

Related : Tata Institute of Fundamental Research Joint Graduate Entrance Exam Biology Question Paper 2017 : www.pdfquestion.in/13096.html

1) All natural amino acids, except one, react with cold nitrous acid and produce nitrogen gas. Which one of the following is that odd amino acid?
A) Tryptophan
B) Glycine
C) Proline
D) Histidine

2) Predict the multiplicities for hydrogens on C1, C3, and C4 of butanone associated with the spin-spin coupling in its 1H NMR spectrum.
A) H’s on C1: Singlet; H’s on C3: Doublet; H’s on C4: Triplet
B) H’s on C1: Singlet; H’s on C3: Triplet; H’s on C4: Quartet
C) H’s on C1: Singlet; H’s on C3: Quartet; H’s on C4: Triplet
D) H’s on C1: Triplet; H’s on C3: Doublet; H’s on C4, Triplet

3) If standard potential of the reaction 2H2O(l) = O2(g, 1bar) + 4H+(aq) + 4e- is E0 = -1.23 V. At 25oC and pH =7, what is the oxidation potential of pure water according to this reaction?
A) +0.410 V
B) -2.620 V
C) -0.817 V
D) -0.410 V

5) Predict the relative rates for the following reductive elimination for X = H, Cl, CH3,OCH3
A) Cl > H > CH3 > OCH3
B) H > Cl > OCH3 > CH3
C) OCH3 > CH3 > H > Cl
D) CH3 > H > Cl > OCH3

6) A bio-conjugation reaction can be used to modify a specific residue on a protein to attachtherapeutics and diagnostic agents. Predict the major product of the following bioconjugation reaction with Fluorescein.

7) For a hydrogen atom, which of the following orbital(s) have the lowest energy:
A) 4s
B) 4p
C) 4d
D) All of the above have same energy

8) An electron tunnels through a square barrier of width d and height h. If h is fixed and d is is normally distributed, then the electron transfer probability distribution is:
A) a normal distribution
B) a delta function
C) a log normal distribution
D) a poisson distribution

9) In a cubic unit cell, identify the Miller plane (111)
10)Zinc solid has hcp (hexagonal close packed) structure. In a unit cell of Zinc solid, the Zinc atoms occupy
A) 74% of volume of unit cell.
B) 80% of volume of unit cell.
C) 68% of volume of unit cell.
D) 90% of volume of unit cell.

11. Solid inorganic materials are commonly classified as conductors, semi-conductors or insulators as determined by their bandgap. Carbon has many allotropes such as diamond, graphite, carbon nanotubes and graphene with distinct bandgaps. Considering the properties of diamond, what should be its bandgap:
A) 7.0 eV
B) 1.0 eV
C) 0.01 eV
D) 0 eV

12) Given an operator A and a set of vectors ?? which obey the following relationship X where AX=BY is the set of scalars. If A commutes with B and B = A, which of the following is correct:
A) X are eigenvectors of A only if the y are all distinct (no two eigenvalues are equal)
B) X are eigenvectors of B
C) X are eigenvectors of B with set of eigenvalues y
D) X need not be eigenvectors of A

13) Given the molecular formula of the hexa-coordinated complexes
(I) Co Cl3 (NH3)6
(II) Co Cl3 (NH3)5
(III) Co Cl3 (NH3)4
If the number of coordinated NH3 molecules in (I), (II), and (III) respectively are 6, 5 and 4 then the oxidation state of Co in (I), (II) and (III) are respectively:
A) +6, +5, +4
B) +3, +2, +1
C) 0, +1, +2
D) +3, +3, +3

14. 16) An aqueous solution contains 0.300 mole L??1 of KH2PO4 and 0.015 mole L??1 of K2HPO4. Which of the following statements is true about this solution? [Data: For H3PO4, pK1 = 2.16, pK2 = 7.21, pK3 = 12.32]
A) It can act as a buffer solution around pH = 2
B) It can act as a buffer solution around pH = 12
C) Its pH will approximately equal to 6.9
D) Both B and C.

15. The complex showing a spin-only magnetic moment of 2.82 B.M. is
A) [Ni(CO)4]
B) [NiCl4]2-
C) [Ni(NH3)4]2+
D) [Ni(CN)4]2-