JEE Main 2024 question paper pdf with solutions- Download Jan 29 Shift 2 Chemistry Question Paper pdf

61: The ascending acidity order of the following H atoms is:

(1) C < D < B < A
(2) A < B < C < D
(3) A < B < D < C
(4) D < C < B < A

62: Match List I with List II:

List I (Bio Polymer) | List II (Monomer)
A. Starch   |   I. Nucleotide
B. Cellulose   |   II. α-glucose
C. Nucleic acid   |   III. β-glucose
D. Protein   |   IV. α-amino acid

(1) A-II, B-I, C-III, D-IV
(2) A-IV, B-II, C-I, D-III
(3) A-I, B-III, C-IV, D-II
(4) A-II, B-III, C-I, D-IV

63: Match List I with List II:

List I (Compound) | List II (pKa value)
A. Ethanol   |   II. 15.9
B. Phenol   |   I. 10.0
C. m-Nitrophenol   |   IV. 8.3
D. p-Nitrophenol   |   III. 7.1

(1) A-I, B-II, C-III, D-IV
(2) A-IV, B-I, C-II, D-III
(3) A-III, B-IV, C-I, D-II
(4) A-II, B-I, C-IV, D-III

64: Which of the following reaction is correct?

(1) Incorrect reaction
(2) Correct reaction
(3) Partially correct reaction
(4) Not a valid reaction

65: According to IUPAC system, the compound is named as:

(1) Cyclohex-1-en-2-ol
(2) 1-Hydroxyhex-2-ene
(3) Cyclohex-1-en-3-ol
(4) Cyclohex-2-en-1-ol

66: The correct IUPAC name of K₂MnO₄ is:

(1) Potassium tetraoxopermanganate (VI)
(2) Potassium tetraoxidomanganate (VI)
(3) Dipotassium tetraoxidomanganate (VII)
(4) Potassium tetraoxidomanganese (VI)

67: A reagent which gives a brilliant red precipitate with Nickel ions in a basic medium is:

(1) Sodium nitroprusside
(2) Neutral FeCl₃
(3) Meta-dinitrobenzene
(4) Dimethyl glyoxime

68: Phenol treated with chloroform in the presence of sodium hydroxide, followed by hydrolysis with acid, results in:

(1) Salicylic acid
(2) Benzene-1,2-diol
(3) Benzene-1,3-diol
(4) 2-Hydroxybenzaldehyde

69: Match List I with List II:

List I (Spectral Series for Hydrogen) | List II (Spectral Region)
A. Lyman   |   I. Infrared region
B. Balmer   |   II. UV region
C. Paschen   |   III. Infrared region
D. Pfund   |   IV. Visible region

(1) A-II, B-III, C-I, D-IV
(2) A-I, B-III, C-II, D-IV
(3) A-II, B-IV, C-III, D-I
(4) A-I, B-II, C-III, D-IV

70: On passing a gas, ‘X,’ through Nessler’s reagent, a brown precipitate is obtained. The gas ‘X’ is:

(1) H₂S
(2) CO₂
(3) NH₃
(4) Cl₂

71: The product A formed in the following reaction is:

72: Identify the reagents used for the following conversion:

(1) A = LiAlH₄, B = NaOH(aq), C = NH₂NH₂/KOH
(2) A = LiAlH₄, B = NaOH(alc), C = Zn/HCl
(3) A = DIBAL-H, B = NaOH(aq), C = NH₂NH₂/KOH
(4) A = DIBAL-H, B = NaOH(alc), C = Zn/HCl

73: Which of the following acts as a strong reducing agent? (Atomic numbers: Ce = 58, Eu = 63, Gd = 64, Lu = 71)

(1) Lu³⁺
(2) Gd³⁺
(3) Eu²⁺
(4) Ce⁴⁺

74: Chromatographic technique(s) based on the principle of differential adsorption is/are:
A. Column chromatography
B. Thin layer chromatography
C. Paper chromatography

(1) B only
(2) A only
(3) A & B only
(4) C only

75: Which of the following statements are correct about Zn, Cd, and Hg?
A. They exhibit high enthalpy of atomization as the d-subshell is full.
B. Zn and Cd do not show variable oxidation state while Hg shows +1 and +2.
C. Compounds of Zn, Cd, and Hg are paramagnetic in nature.
D. Zn, Cd, and Hg are called soft metals.

(1) B, D only
(2) B, C only
(3) A, D only
(4) C, D only

76: The element having the highest first ionization enthalpy is:

(1) Si
(2) Al
(3) N
(4) C

77: Alkyl halide is converted into alkyl isocyanide by reaction with:

(1) NaCN
(2) NH₄CN
(3) KCN
(4) AgCN

78: Which one of the following will show geometrical isomerism?

(1) CH₃CH=CHCH₃
(2) CH₂=CBr₂
(3) CH₃CH=CHBr
(4) Cyclohexane

79: Given below are two statements:
Statement I: Fluorine has the most negative electron gain enthalpy in its group.
Statement II: Oxygen has the least negative electron gain enthalpy in its group.
In the light of the above statements, choose the most appropriate option from the options given below:

(1) Both Statement I and Statement II are true
(2) Statement I is true but Statement II is false
(3) Both Statement I and Statement II are false
(4) Statement I is false but Statement II is true

80: Anomalous behavior of oxygen is due to its:

(1) Large size and high electronegativity
(2) Small size and low electronegativity
(3) Small size and high electronegativity
(4) Large size and low electronegativity

81: The total number of antibonding molecular orbitals formed from 2s and 2p atomic orbitals in a diatomic molecule is:

82: The oxidation number of iron in the compound formed during the brown ring test for NO₃⁻ ion is:

83: The equilibrium constant for the formation of NH₃ from N₂ and H₂, given [N₂] = 2×10⁻² M, [H₂] = 3×10⁻² M, [NH₃] = 1.5×10⁻² M at 500 K, is:

84: The molality of a 0.8 M H₂SO₄ solution with density 1.06 g/cm³ is:

85: The amount of NaOH in 50 mL of a solution neutralized by 50 mL of 0.5 M oxalic acid is:

86: The total number of sigma (σ) and pi (π) bonds in 2-formylhex-4-enoic acid is:

87: The half-life of radioisotopic bromine-82 is 36 hours. The fraction that remains after one day is:

88: Standard enthalpy of vaporization for CCl₄ is 30.5 kJ/mol. Heat required for vaporization of 284 g of CCl₄ at constant temperature is:

89: A constant current was passed through a solution of AuCl₄⁻ ions between gold electrodes. After 10 minutes, the increase in the cathode’s mass was 1.314 g. The total charge passed through the solution is:

90: The total number of molecules with zero dipole moment among CH₄, BF₃, H₂O, HF, NH₃, CO₂, and SO₂ is: