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CHEMISTRY (COMPULSORY)
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Q. 1 – Q. 5 carry one mark each.
Q.1
The molecule having net 'non-zero dipole moment' is
(A) CCl4 (B) NF3 (C) CO2 (D) BCl3
Q.2
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The Diels-Alder adduct from the reaction between cyclopentadiene and benzyne is
(A) (B) (C) (D)
Q.3 The number of possible enantiomeric pair(s) in HOOC-CH(OH)-CH(OH)-COOH is_
Q.4
For the electrochemical reaction, Cu2+(aq) + Zn(s) = Cu(s) + Zn2+(aq)
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the equilibrium constant at 25 °C is 1.7 × 1037. The change in standard Gibbs free energy (?G°) for this reaction at that temperature will be
(Given: R = 8.314 JK-1mol-1) __________ kJ mol-1 (up to one decimal place).
Q.5 Among the following diagrams, the one that correctly describes a zero order reaction (X? product) is
(Given: [X]0 = initial concentration of reactant X; [X] = concentration of reactant X at time t and t1/2 = half-life period of reactant
(A) (B)
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(C) (D)
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Q. 6 – Q. 15 carry two marks each.
Q.6
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If the radius of first Bohr orbit is 0.53 Å, then the radius of the third Bohr orbit is
(A) 2.12 Å (B) 4.77 Å (C) 1.59 Å (D) 3.18 Å
Q.7
If 50 mL of 0.02 M HCl is added to 950 mL of H2O, then the pH of the final solution will be __________.
Q.8
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Stability of [CrCl6]3- (X), [MnCl6]3- (Y) and [FeCl6]3- (Z) follows the order
(Given: Atomic numbers of Cr = 24, Mn = 25 and Fe = 26)
(A) X > Y > Z (B) X < Y < Z (C) Y < X < Z (D) X < Y = Z
Q.9 Among the following pairs, the paramagnetic and diamagnetic species, respectively, are
(A) CO and O2 (B) NO and CO (C) O22- and CO (D) NO+ and O2
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Q.10 In compounds K4[Fe(CN)6] (P) and Fe(CO)5 (Q), the iron metal centre is bonded to
(A) C of CN- in P and C of CO in Q (B) N of CN- in P and C of CO in Q
(C) C of CN- in P and O of CO in Q (D) N of CN- in P and O of CO in Q
Q.11 Among the following reactions, the one that produces achiral alcohol (after hydrolysis) is
(A) (B)
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(C) (D)
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Q.12 The major product from the following reaction is
R = tert-Butyl
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(A) (B) (C) (D)
Q.13 The order of resonance energy for the following molecules is
(1) (2) (3) (4)
(A) (1) > (3) > (2) > (4) (B) (1) > (3) > (4) > (2)
(C) (1) > (4) > (2) > (3) (D) (1) > (4) > (3) > (2)
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Q.14 The molar enthalpy of vaporization for a liquid (normal boiling point = 78.3 °C) is 39 kJ mol-1. If the liquid has to boil at 25 °C, the pressure must be reduced to __________ Torr (up to one decimal place).
(Given: R = 8.314 JK-1mol-1; 1 atm = 760 Torr)
Q.15
For the process, H2O(l) ? H2O(s) at 0 °C and 1 atm, the correct statement is
(A) ?Ssystem = 0 (B) ?Stotal > 0 (C) ?Stotal = 0 (D) ?Stotal < 0
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END OF THE QUESTION PAPER
This download link is referred from the post: GATE Previous Last 10 Years 2010-2020 Question Papers With Solutions And Answer Keys
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