GATE 2023 CY – Previous Year Questions with Solutions
All 65 questions of GATE 2023 CY with answers and explanations. Read each question, then practise it by topic or as a full paper.
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- Question 1 – “I cannot support this proposal. My will not permit it.”
- Question 2 – Courts : : : Parliament : Legislature (By word meaning)
- Question 3 – What is the smallest number with distinct digits whose digits add up to 45?
- Question 4 – In a class of 100 students, (i) there are 30 students who neither like romantic movies nor comedy movies, (ii) the number of students who like…
- Question 5 – How many rectangles are present in the given figure? . .
- Question 6 – Forestland is a planet inhabited by different kinds of creatures. Among other creatures, it is populated by animals all of whom are ferocious. There…
- Question 7 – Which one of the following options represents the given graph?
- Question 8 – Which one of the following options can be inferred from the given passage alone? When I was a kid, I was partial to stories about other worlds and…
- Question 9 – Out of 1000 individuals in a town, 100 unidentified individuals are covid positive. Due to lack of adequate covid-testing kits, the health authorities…
- Question 10 – A 100 cm × 32 cm sheet is folded five times, each time aligning one long edge with the opposite long edge, giving a 100 cm × 1 cm rectangle. The total…
- Question 11 – The major product formed in the given reaction is
- Question 12 – The compound which gives a fragment at 𝑚/𝑧 = 124[M+H]+ is
- Question 13 – The major product formed in the given reaction is
- Question 14 – The major product formed in the given reaction is
- Question 15 – On irradiation using UV light (>300 nm), compounds X and Y, predominantly, undergo
- Question 16 – The topicity relationship of Ha and Hb in X, Y and Z are, respectively,
- Question 17 – Compound P was prepared based on a four-component reaction at room temperature in methanol. The required starting materials for the synthesis are
- Question 18 – The major product formed in the following reaction is
- Question 19 – The reaction of Ph 3PCl 2 with PhNH 2 primarily produces .
- Question 20 – Formation of [M(en) 3]2+ from [M(H 2O) 6]2+ and three equivalents of ethylenediamine (en) is LEAST favoured when M is .
- Question 21 – Wacker oxidation of alkenes is catalyzed by a combination of
- Question 22 – For conversion of [Pt(L)Cl 3]- to trans-[Pt(L)Cl 2(H 2O)], the trans-effect is LEAST when ligand L is .
- Question 23 – The tetracoordinated copper center in the oxidized and reduced forms of plastocyanin exhibits longest bond with
- Question 24 – The packing efficiency (in %) of spheres for a body-centered cubic (bcc) lattice is approximately
- Question 25 – The magnitudes of CFSE in [M(H 2O) 6]n+ for Mn and Fe satisfy .
- Question 26 – The organometallic catalyst for the following transformation is
- Question 27 – The point group of naphthalene (C 10H 8) is .
- Question 28 – Which statement is INCORRECT?
- Question 29 – For an ideal gas, the molecular partition function in the canonical ensemble, that is proportional to the system volume (𝑉), is the
- Question 30 – Assertion (S): The total angular momentum for light atoms (low atomic number) is obtained by Russell-Saunders coupling, whereas jj-coupling is used…
- Question 31 – The acetolysis product(s) of the given reaction is(are)
- Question 32 – Product(s) formed in the given reaction is(are)
- Question 33 – In the nuclear reaction \!60 28Ni+ P, unstable P can yield n+Q, 2n+R, or p+n+S. Which isotope identifications are correct?
- Question 34 – For the Lindemann-Hinshelwood mechanism of gas phase unimolecular reactions, the true statement(s) is(are)
- Question 35 – The calculated magnetic moment of [Ce(NO 3) 5]2- is BM (two decimal places). Atomic number of Ce is 58.
- Question 36 – A compound C 15H 16O 2 has the following spectra. Its structure is which of the choices shown? 1H NMR (ppm): 9.16 (s), 6.89 (d, J=8 Hz), 6.64 (d, J=8…
- Question 37 – The major product formed in the given reaction sequence is
- Question 38 – E and F in the given reaction scheme are
- Question 39 – M and N in the given reaction scheme are
- Question 40 – For the indicated hydrogen nuclei, the 1H NMR multiplicities in I–IV, respectively, are . I. Hydride H in [HNi(OPEt 3) 4]+ II. Si–H in Ph 2Si(Me)H…
- Question 41 – Treatment of (5-C 5H 5) 2Ni with Na/Hg in ethanol gives major product .
- Question 42 – The numbers of shared corners per constituent SiO 4 unit in orthosilicate, pyrosilicate, cyclic silicate, and sheet silicate, respectively, are .
- Question 43 – For consecutive reactions Pk 1Qk 2R, [Q]=k 1[P] 0k 2-k 1(e-k 1t-e-k 2t), where [P] 0 is initial P concentration. With k 2=25 s-1, which k 1 gives the…
- Question 44 – The wavefunction of Be3+ in a state is =Ne-4r/a 0, with normalization constant N, electron–nucleus distance r, and Bohr radius a 0. The most probable…
- Question 45 – Match Column I functions with Column II quantum systems. P. Associated Legendre polynomials Q. Hermite polynomials R. Associated Laguerre polynomials…
- Question 46 – In P 2[k 1]I a2Qk 2R, I a is absorbed light intensity and the first-step quantum yield is one. The steady-state Q concentration is .
- Question 47 – Product(s) formed in the given reaction sequence is(are)
- Question 48 – Product(s) formed in the reaction below is(are)
- Question 49 – The stereoisomer(s) of G giving the depicted product is(are)
- Question 50 – Product(s) formed in the given reaction sequence is(are)
- Question 51 – The reaction(s) in which inversion of configuration occur(s) is(are)
- Question 52 – The correct statement(s) regarding myoglobin (Mb) and haemoglobin (Hb) is(are)
- Question 53 – Which statements about Co 2(CO) 8 are correct?
- Question 54 – Which compounds have metal ions with [Xe]4f1 configuration? Atomic numbers: Ce 58, Lu 71, Pr 59, Nd 60.
- Question 55 – Which statements about XeF 2 are correct?
- Question 56 – For nondissociative gas adsorption on a solid, the Freundlich isotherm is =kp1/n, where θ is coverage, p pressure, and k,n empirical constants. The…
- Question 57 – Two enzyme-catalysis reactions I and II have identical y-intercepts in Lineweaver–Burk plots, but slope I is twice slope II. Initial enzyme…
- Question 58 – The enthalpy change for the exothermic reaction between BeI 2 and HgF 2 is kJ/mol (nearest integer). Bond dissociation energies (kJ/mol): Be–F 632,…
- Question 59 – The number of carbons directly connected to the metal centre in [W(C 60)(CO) 5] is (nearest integer). Atomic number of W is 74.
- Question 60 – Naphthalene–benzene forms a simple eutectic solid–liquid system. For an ideal solution at 300 K and 1 bar, naphthalene mole fraction in benzene is…
- Question 61 – Polystyrene in toluene has intrinsic viscosity 84 cm3/g at 30 °C. It follows Mark–Houwink with K=1.0510-2 cm3/g and a=0.75. Its molecular weight is…
- Question 62 – By the Debye–Hückel limiting law, the mean molal activity coefficient of 0.87 g K 2SO 4 (molar mass 174 g/mol) in 1 kg water at 25 °C is (two decimal…
- Question 63 – Dissolve 128 g naphthalene (C 10H 8) in 780 g benzene (C 6H 6). Pure-benzene vapour pressure is 12.6 kPa at 25 °C. For an ideal solution, benzene…
- Question 64 – For cell H 2(g) HCl(aq) Cl 2(g), E=1.73-(1.2510-3)T+(1.0010-6)T2, with E in V and T in K. The standard cell-reaction enthalpy change at 300 K is…
- Question 65 – Three noninteracting compounds P,Q,R are in a cuvette of path 1 cm. Concentrations are [P]=10-6 M, [Q]=210-6 M, [R]=310-6 M. Their molar extinction…