JEE Main 2024 · 6 Apr 2024 Shift 1

The density of 'x' M solution ('x' molar) of NaOH is 1.12 g mL⁻¹, while in molality, the concentration of the solution is 3 m (3 molal). Then x is (Given : Molar mass of NaOH is 40 g/mol)

1. A3.5
2. B3.8
3. C3.0
4. D2.8

At −20 °C and 1 atm pressure, a cylinder is filled with equal number of H₂, I₂ and HI molecules for the reaction H₂(g) + I₂(g) ⇌ 2HI(g), the Kₚ for the process is x × 10⁻¹. x = __________. [Given : R = 0.082 L atm K⁻¹ mol⁻¹]

1. A1
2. B10
3. C0.01
4. D2

Which of the following material is not a semiconductor.

1. ACopper oxide
2. BGraphite
3. CGermanium
4. DSilicon

The electron affinity value are negative for

1. ABe → Be⁻
2. BN → N⁻
3. CO → O²⁻
4. DNa → Na⁻
5. EAl → Al⁻ Choose the most appropriate answer from the options given below :

Given below are two statements : Statement I : Gallium is used in the manufacturing of thermometers. Statement II : A thermometer containing gallium is useful for measuring the freezing point (256 K) of brine solution. In the light of the above statements, choose the correct answer from the options given below :

1. ABoth Statement I and Statement II are true
2. BBoth Statement I and Statement II are false
3. CStatement I is true but Statement II is false
4. DStatement I is false but Statement II is true

The number of element from the following that do not belong to lanthanoids is Eu, Cm, Er, Tb, Yb and Lu

1. A5
2. B1
3. C3
4. D4

Consider the following complexes [CoCl(NH₃)₅]²⁺, [Co(CN)₆]³⁻, [Co(NH₃)₅(H₂O)]³⁺, [Cu(H₂O)₄]²⁺ (A) (B) (C) (D) The correct order of A, B, C and D in terms of wavenumber of light absorbed is :

1. AD < A < C < B
2. BB < C < A < D
3. CC < D < A < B
4. DA < C < B < D

Which of the following statements are correct?

1. AGlycerol is purified by vacuum distillation because it decomposes at its normal boiling point.
2. BAniline can be purified by steam distillation as aniline is miscible in water.
3. CEthanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope.
4. DAn organic compound is pure, if mixed M.P. is remained same. Choose the most appropriate answer from the options given below :