GATE 2016 Question Paper with Answer Keys for Chemistry (CY) - Grad Plus

# GATE 2016 Question Paper with Answer Keys for Chemistry (CY)

Q. 1 – Q. 5 carry one mark each.

Q.1 An apple costs Rs. 10. An onion costs Rs. 8. Select the most suitable sentence with respect to grammar and usage.

(A) The price of an apple is greater than an onion.

(B) The price of an apple is more than onion.

(C) The price of an apple is greater than that of an onion.

(D) Apples are more costlier than onions.

ANS:-(C) The price of an apple is greater than that of an onion.

Q.2 The Buddha said, “Holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burnt.” Select the word below which is closest in meaning to the word underlined above.

(A) burning

(B) igniting

(C) clutching

(D) flinging

ANS:-(C) clutching

Q.3 M has a son Q and a daughter R. He has no other children. E is the mother of P and daughter-in law of M. How is P related to M?

(A) P is the son-in-law of M.

(B) P is the grandchild of M.

(C) P is the daughter-in law of M.

(D) P is the grandfather of M.

ANS:-(B) P is the grandchild of M.

Q.4 The number that least fits this set: (324, 441, 97 and 64) is ________.

(A) 324

(B) 441

(C) 97

(D) 64

ANS:- (C) 97 :(D) 64

Q.5 It takes 10 s and 15 s, respectively, for two trains travelling at different constant speeds to completely pass a telegraph post. The length of the first train is 120 m and that of the second train is 150 m. The magnitude of the difference in the speeds of the two trains (in m/s) is ____________.

(A) 2.0

(B) 10.0

(C) 12.0

(D) 22.0

ANS:-(A) 2.0

#### Q. 6 – Q. 10 carry two marks each.

Q6.The velocity V of a vehicle along a straight line is measured in m/s and plotted as shown with respect to time in seconds. At the end of the 7 seconds, how much will the odometer reading increase by (in m)?

(A) 0

(B) 3

(C) 4

(D) 5

ANS:-(D) 5

Q7.The overwhelming number of people infected with rabies in India has been flagged by the World Health Organization as a source of concern. It is estimated that inoculating 70% of pets and stray dogs against rabies can lead to a significant reduction in the number of people infected with rabies.

Which of the following can be logically inferred from the above sentences?

(A)The number of people in India infected with rabies is high.

(B)The number of people in other parts of the world who are infected with rabies is low.

(C)Rabies can be eradicated in India by vaccinating 70% of stray dogs.

(D)Stray dogs are the main source of rabies worldwide.

ANS:-(A)The number of people in India infected with rabies is high.

Q8. A flat is shared by four first year undergraduate students. They agreed to allow the oldest of them to enjoy some extra space in the flat. Manu is two months older than Sravan, who is three months younger than Trideep. Pavan is one month older than Sravan. Who should occupy the extra space in the flat?

(A)  Manu

(B) Sravan

(C) Trideep

(D) Pavan

ANS:-(C) Trideep

Q.9  Find the area bounded by the lines 3x+2y=14, 2x-3y=5 in the first quadrant.

(A)14.95

(B)15.25

(C)15.70

(D)20.35

ANS:-(B)15.25

Q.10 A straight line is fit to a data set (ln x, y). This line intercepts the abscissa at ln x = 0.1 and has a slope of −0.02. What is the value of y at x = 5 from the fit?

(A) −0.030

(B) −0.014

(C) 0.014

(D) 0.030

ANS:-(A) −0.030

Q. 1 – Q. 25 carry one mark each.

Q.1 [CpMoCl2]2 obeys the 18 electron rule. The correct structure of this compound is (atomic number of Mo = 42)

(A)

(B)

(C)

(D)

ANS:- (C)

Q.2 During oxygen transport by hemerythrin, oxygen is bound as

(A) O2̶ to one Fe(III) only

(B) HO2to one Fe(III) only

(C) O2-2 to one Fe(II) and one Fe(III)

(D) O2-2 to two Fe(II)

ANS:-(B) HO2to one Fe(III) only

Q.3 Among the following, the most stable isotope to radioactive decay is

(A) {}_{82}^{206}Pb

(B) {}_{82}^{210}Pb

(C) {}_{82}^{212}Pb

(D) {}_{82}^{214}Pb

ANS:-(A) {}_{82}^{206}Pb

Q.4 At pH 7.2 and 10 Torr oxygen partial pressure, the extent of O2 binding is

(A) high for both hemoglobin and myoglobin

(B) high for hemoglobin and low for myoglobin

(C) high for myoglobin and low for hemoglobin

(D) low for both hemoglobin and myoglobin

ANS:-(C) high for myoglobin and low for hemoglobin

Q.5 In the first row high-spin transition metal complexes [M(H2O)6]Cl2 with d5 and d7 metal ions, the d-d transitions are

(A) spin-forbidden for both

(B) spin-allowed for both

(C) spin-forbidden for d5 and spin-allowed for d7

(D) spin-allowed for d5 and spin-forbidden for d

ANS:-(C) spin-forbidden for d5 and spin-allowed for d7

Q.6 Among the given boranes and heteroboranes, the example which belongs to ‘closo’ type is

(A) B5H ̶

(B) [C2B9H11]2 ̶

(C) GeC2B9H11

(D) B6H10

ANS:-(C) GeC2B9H11

Q.7 The reaction of P2O5 with HNO3 and HClO4, respectively, gives

(A) NO2 and ClO2

(B) N2O5 and Cl2O6

(C) N2O3 and Cl2O7

(D) N2O5 and Cl2O7

ANS:-(D) N2O5 and Cl2O7

Q.8 When crystals of sodium chloride are heated in the presence of sodium vapor, they turn yellow. This is due to the formation of

(A) Schottky defects

(B) Frenkel defects

(C) F-centres

(D) H-centres

ANS:-(C) F-centres

Q.9 One mole of an ideal gas is compressed from 5 L to 2 L at constant temperature. The change in entropy, in J K-1, of the gas is ____________. (R = 8.314 J K-1 mol-1)

ANS:–7.65 : -7.48

Q.10 The linear momentum of a particle described by the wavefunction e-ikx is

(A) Kℎ

(B) −Kℎ

(C) Kℏ

(D) −Kℏ

ANS:-(D) −Kℏ

Q.11 For an elementary bimolecular gas phase reaction, activation energy is 5.5 kJ mol-1. Enthalpy of activation, in kJ mol-1, at 300 K is _____________. (R = 8.314 J K-1 mol-1)

ANS:-0.50 : 0.52

Q.12 The titration of a strong acid with a strong base is represented by the plot

ANS:- (C)

Q.13 Of the following inequalities, the criterion/criteria for spontaneity of a chemical reaction is/are

(i) (ΔG)T,P < 0 (ii) (ΔU)S,V > 0 (iii) (ΔS)U,V > 0

(A) (i) only

(B) (ii) only

(C) (i) and (ii)

(D) (i) and (iii)

ANS:-(D) (i) and (iii)

Q.14 A protein sample consists of an equimolar mixture of ribonuclease (molar mass = 13.7 kg mol˗1), hemoglobin (molar mass = 15.5 kg mol˗1), and myoglobin (molar mass = 17.2 kg mol˗1). The statement that is true about the weight-average molar mass (\overline{M_w}), the number-average molar mass (\overline{M_n}), and the polydispersity index (PDI) for this sample is

(A) (\overline{M_w}) > (\overline{M_n}) = 15.5 kg mol˗1 and PDI > 1

(B) (\overline{M_w}) > (\overline{M_n})= 15.5 kg mol˗1 and PDI < 1

(C) (\overline{M_w})= 15.5 kg mol˗1 > (\overline{M_n}) and PDI > 1

(D) (\overline{M_w} = 15.5 kg mol˗1 <  (\overline{M_n}) and PDI < 1

ANS:-(A) (\overline{M_w}) > (\overline{M_n}) = 15.5 kg mol˗1 and PDI > 1

Q.15 The band structure given below represents a

(A) n-type semiconductor formed by doping Si with B

(B) n-type semiconductor formed by doping Si with P

(C) p-type semiconductor formed by doping Si with P

(D) p-type semiconductor formed by doping Si with B

ANS:-(D) p-type semiconductor formed by doping Si with B

Q.16 The experimental ionization energies of hydrogen and helium atoms in their ground states are, respectively, 13.6 eV and 24.6 eV. The ground state energy of helium atom, in eV, is

(A) − 1/2(13.6) ˗ 24.6

(B) −4(13.6) ˗ 24.6

(C) − 1/4(13.6) ˗ 24.6

(D) −2(13.6) ˗ 24.6

ANS:-(B) −4(13.6) ˗ 24.6

Q.17 Ring flipping of the compound in the following conformation leads to

ANS:- (B)

Q.18 The total number of lines expected (due to spin-spin coupling of proton with fluorine and deuterium nuclei) in the 1H NMR spectrum of the following compound is __________.

ANS:-5.99 : 6.01

Q.19 The compound in ‘R’ configuration is

ANS:- (A)

Q.20 The most suitable reagent for performing the following transformation, is

(A) LiAlH4

(B) H2, Pd/C

(C) PPh3, H2O

(D) Li, liq. NH3

ANS:-(C) PPh3, H2O

Q.21 The major product obtained in the following reaction, is

ANS:- (D)

Q.22 The favourable transition state leading to the formation of the product in the following reaction, is

ANS:- (D)

Q.23 The major product of the following reaction, is

ANS:- (B)

Q.24 The major product obtained in the following reaction, is

ANS:- (A)

Q.25 The major product formed in the following reaction, is

ANS:- (C)

Q. 26 – Q. 55 carry two marks each.

Q.26 The Larmor frequency of 1H at 1 Tesla (T) is 42.57 MHz. If the magnetogyric ratios for 1H and 13C are 26.75 × 107 rad T-1 s-1 and 6.72 × 107 rad T-1 s-1, respectively, the Larmor frequency of 13C, in MHz, at 1 Tesla will be __________.

ANS:-10.67 : 10.71

Q.27 At 1 bar and 298 K, for the process A(s) ⟶ A(l), the ΔG is 200 J mol-1 and the ΔVm is −2 × 10-6 m3 mol-1. The minimum pressure, in bar, at which the process becomes spontaneous at 298 K is _________. (1 bar = 105 Pa)

ANS:-1000.00 : 1001.00

Q.28  The reaction, A ⇋ B, is first order in both the directions. The forward and reverse rate constants are 4.2 × 10-4 s-1 and
1.04 × 10-3 s-1, respectively. The relaxation time for this reaction, in seconds, in a temperature jump experiment is _____________.

ANS:-666.67 : 685.00

Q.29 Adsorption of CO on charcoal at 273 K follows Langmuir isotherm. A plot of P (kPa) / V (cm3) versus P (kPa) is linear with a slope of 0.01 and y-intercept of 0.5. The equilibrium constant, K (kPa-1), for the adsorption is ___________.

ANS:-0.019 : 0.021

Q.30 For the following reaction,

if steady state approximation can be applied on [I], the observed rate constant of product formation, in L mol-1 s-1, will be __________.

ANS:-99.85 : 100

Q.31 The correct set of infra-red spectral bands (in cm-1) for the νCO stretching mode of the given carbonyl complex is

(A) 1827, 1783, 1766

(B) 1973, 1827, 1794

(C) 1833, 1775, 1650

(D) 1960, 1918

ANS:-(A) 1827, 1783, 1766

Q.32 The 19F NMR spectrum of ClF3 when measured at −60 ºC will be observed as a

(A) singlet

(B) doublet

(C) doublet and a triplet

(D) doublet of doublet and a doublet of triplet

ANS:-(C) doublet and a triplet

Q.33 Among the given platinum(II) complexes, the one that is thermally the most unstable is

ANS:- (C)

Q.34 The shapes of XeF5+ and XeF 5, respectively, are

(A) pentagonal planar and square pyramidal

(B) pentagonal planar and trigonal bipyramidal

(C) square pyramidal and pentagonal bipyramidal

(D) square pyramidal and pentagonal planar

ANS:-(D) square pyramidal and pentagonal planar

Q.35 Sodium salts of pseudo halogens X, Y, and Z form colourless solutions in water. Solution of X decolorizes I3˗ solution with brisk effervescence. Solution of Y gives an intense red colour on reaction with Fe3+ solution. Solution of Z gives an intense blue colour on reaction with a solution containing Fe3+ and Fe2+ ions. The pseudo halogens X, Y, and Z, respectively, are

(A) CN˗, N3 -, and CNS

(B) N3, CNS-, and CN˗

(C) N3 , CN˗, and CNS

(D) N3 , CNS˗, and CNOQ.

ANS:-(B) N3 , CNS, and CN˗

Q36. On reacting 1.55 g of a diol with an excess of methyl magnesium iodide, 1.12 L (corrected to STP) of methane gas is liberated. The molecular mass (g mol-1) of the diol is ____________.

ANS:-61.6 : 62.1

Q.37 The structure of the compound having the following characteristic spectral data, is IR: 1690 cm-1;

1H-NMR: 1.30 (3H, t, J = 7.2 Hz); 2.41 (2H, q, J = 7.2 Hz); 2.32 (3H, s); 7.44 (1H, t, J = 7.0 Hz); 7.57 (1H, dt, J = 7.0, 3.0 Hz); 7.77 (1H, t, J = 3.0 Hz); 7.90 (1H, dt, J = 7.0, 3.0 Hz); EI Mass: m/z 119 (100%); 57 (80%).

ANS:- (A)

Q.38 The major products X and Y formed in the following synthetic scheme, are

ANS:- (B)

Q.39 The major products S and T formed in the following synthetic scheme, are

ANS:- (A)

Q.40 Among the following, the transformation(s) that can be accomplished using umpolung concept is(are)

(A) (i) and (iii)

(B) (ii) and (iv)

(C) (ii) only

(D) (i) and (ii)

ANS:-(D) (i) and (ii)

Q.41 A disaccharide does NOT give a positive test for Tollen’s reagent. Upon acidic hydrolysis, it gives an equimolar mixture of two different monosaccharides, both of which can be oxidized by bromine water. This disaccharide is

ANS:- (D)

Q.42 The major products M and N in the following reaction sequence are

ANS:- (A)

Q.43 The major products P and Q in the following reaction sequence, are

ANS:- (C)

Q.44 The major product formed in the following reaction, is

ANS:- (B)

Q.45 The following synthetic transformation can be achieved using

(A) (p) only

(B) (p) and (q)

(C) (q) and (r)

(D) (r) only

ANS:-(B) (p) and (q)

Q.46 Consider a two-state system at thermal equilibrium with equal degeneracy where the excited state is higher in energy than the ground state by 0.1 eV. The ratio of the population of the excited state to that of the ground state, at a temperature for which kBT = 0.05 eV, is _________.

ANS:-0.13 : 0.14

Q.47 Of the vibrational modes given below, the IR active mode(s) is(are)

(A) (ii) only

(B) (iii) only

(C) (i) and (ii)

(D) (ii) and (iii)

ANS:-(D) (ii) and (iii)

Q.48 A system is described by the following real wavefunction

The probability (P) of finding the particle in a region dx around points I, II, and III in the figure obeys the trend

(A) P(I) > P(II) > P(III)

(B) P(II) > P(III) > P(I)

(C) P(II) > P(I) > P(III)

(D) P(III) > P(I) > P(II)

ANS:- (B) P(II) > P(III) > P(I)

Q.49 The temperature-composition (T-x) phase diagram of the two-component system made of X and Y is given below. At a temperature of 288 K and starting at the point P, Y is added until the composition reaches S. Which of the following statements is NOT TRUE?

(A) At P, the solid and liquid are present in almost equal proportions.

(B) At Q, the system is all liquid.

(C) At S, the system has more solid than liquid.

(D) At R, the liquid is pure X.

ANS:-(D) At R, the liquid is pure X.

Q.50 For a system subjected to only P-V work, entropy is given by

(i) -{\left(\frac{\partial G}{\partial T}\right)}_P

(ii){\left(\frac{\partial G}{\partial P}\right)}_T

(iii)-{\left(\frac{\partial A}{\partial V}\right)}_T

(iv)-{\left(\frac{\partial A}{\partial V}\right)}_T

(A) (i) and (ii)

(B) (i) and (iv)

(C) (i) only (D)

(ii) only

ANS:-(B) (i) and (iv)

Q.51 According to Irving-Williams series, the number of d electrons for the first row transition metal (M) ion having the highest overall stability constant (log β) for [M(EDTA)]2- is ________.

ANS:-8.90 : 9.10

Q.52 The magnitude of the difference in the crystal field stabilization energies, in Δo (ignoring pairing energy), of [Fe(H2O)6]2+ and [Fe(CN)6]4- is _________.

ANS:-1.90 : 2.10

Q.53 The calculated and observed magnetic moments differ considerably for an aqua complex of a lanthanide(III) ion as a result of low lying states of high J. The ion, among the following, is

(A) Ce3+

(B) Pr3+

(C) Eu3+

(D) Yb3+

ANS:-(C) Eu3+

Q. 54. In the electronic spectrum of [CrF6]3-, absorption bands observed at 670, 440, and 290 nm are, respectively, due to the transitions

(A) 4A2g4T1g(P), 4A2g4T1g(F) and 4A2g4T2g

(B) 4A2g4T1g(P), 4A2g4T2g and 4A2g4T1g(F)

(C) 4A2g4T1g(F), 4A2g4T1g(P) and 4A2g4T2g

(D) 4A2g4T2g, 4A2g4T1g(F) and 4A2g4T1g(P)

ANS:-(D) 4A2g4T2g, 4A2g4T1g(F) and 4A2g4T1g(P)

Q. 55. Amongst the following, the group that is bound to the metal ion in coenzyme B12 is

(A) methyl

(B) cyanide