RE-NEET Chemistry Class 11 Questions

The compound that CANNOT be obtained from the aldol condensation reaction shown below, is

A protein undergoes reversible thermal denaturation from its initial state N to denatured state D according to N ⇌ D. At 60 °C, the concentrations of both N and D are equal at equilibrium, and the standard enthalpy change of denaturation is 666 kJ mol⁻¹. The standard entropy change (ΔS° in kJ K⁻¹mol⁻¹) of the protein upon denaturation at 60 °C is closest to

Given below are two statements: Statement-I: Heating NaCl with concentrated H₂SO₄ and MnO₂ results in oxidation of Mn. Statement-II: Heating NaI with concentrated H₂SO₄ and MnO₂ results in reduction of Mn. In light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: Statement I: trans-But^{-2}-ene upon treatment with Br₂ in CCl₄ gives the following product. Statement II: cis-But^{-2}-ene upon treatment with alkaline KMnO₄ gives the following product.

The following carbocation is stabilized by the interaction of the empty p orbital with

Consider the following schematic plots of orbital wavefunction (ψr) against distance (r) from the nucleus. The figure representing two radial nodes in the orbital is

Consider the reversible processes for 1.0 mol of an ideal gas as shown in the figure. w₁, w₂, w₃ and w₄ represent work done (in calories) in the processes 1, 2, 3 and 4, respectively; ΔU₂ and ΔU₄ are changes in the internal energy for the processes 2 and 4, respectively. [use R = 2 cal K⁻¹ mol⁻¹] The correct option is

In an acidic medium, 10 mL of 0.25 M oxalic acid is titrated with KMnO₄ solution. If the volume of KMnO₄ solution required to reach end point is 10 mL, the strength of the KMnO₄ solution is

Among the following, the compound having conjugated double bonds is

One of the products formed in the following reaction is

Two moles of an ideal gas undergo free expansion from 10 L to 100 L at 300 K. The values of ΔS_system and ΔS_surroundings are (R is universal gas constant)

Consider the following reaction sequences and choose the correct option.

The major product X formed in the following reaction sequence is:

Choose the correct statement for the work done in the expansion and heat absorbed or released when 5 litres of an ideal gas at 10 atmospheric pressure isothermally expands into vacuum until volume is 15 litres:

The correct IUPAC name of the compound is:

Select the incorrect reaction among the following:

The major product D formed in the following reaction sequence is: CH₃OH → A → B → C → D (major)

The quantum numbers of four electrons are given below: I. n = 4; l = 2; m₁ = -2; s = -½ II. n = 3; l = 2; m₁ = 1; s = +½ III. n = 4; l = 1; m₁ = 0; s = +½ IV. n = 3; l = 1; m₁ = -1; s = +½ The correct decreasing order of energy of these electrons is

The major product C in the below mentioned reaction is: CH₃CH₂CH₂Br →[alc. KOH, Δ] A →[HBr] B →[aq. KOH, Δ] C

For an endothermic reaction: (A) qₚ is negative. (B) ΔH is positive. (C) ΔH is negative. (D) qₚ is positive. Choose the correct answer from the options given, below:

The oxidation states not shown by Mn in given reaction is: 3MnO₄²⁻ + 4H⁺ ⟶ 2MnO₄⁻ + MnO₂ + 2H₂O

Given below are two statements: Statement I: The Balmer spectral line for H atom with lowest energy is located at \( \frac{5}{36} R_H \text{ cm}^{-1} \). (R_H = Rydberg constant) Statement II: When the temperature of blackbody increases, the maxima of the curve (intensity of wavelength) shifts to shorter wavelength. In the light of the above statements, choose the correct answer from the options given below:

Identify the incorrect statement.

Match List-I with List-II:

The ratio of solubility of AgCl in 0.1 M KCl solution to the solubility of AgCl in water is: (Given : Solubility product of AgCl = 10⁻¹⁰)

For the following reaction at 300 K A₂(g) + 3B₂(g) → 2AB₃(g) the enthalpy change is +15 kJ, then the internal energy change is:

Methyl group attached to a positively charged carbon atom stabilizes the carbocation due to