NEET Chemistry Class 11 Questions

If for a gas \( \frac{R}{C_v} = 0.67 \), this gas is made up of molecules which are

Which of the following statements (s) is/are true? “Internal energy of an ideal gas — ”

Which of the following quantum numbers are correct for the outermost electron of sodium atom?

For the electrons of oxygen atom, which of the following statements is correct?

A certain orbital has no angular nodes and two radial nodes. The orbital is

How many nodal planes are there in the atomic orbitals for the principal quantum number n = 3?

Two electrons present in M shell will differ in

The structure of product X in the following reaction is

How many nodal planes are there in the atomic orbitals for the principal quantum number n = 3?

Which of the following graphs represents exothermic reaction?

Match the column I with column II and mark the appropriate choice

For an isothermal reversible expansion process, the value of q can be calculated by the expression

The electronic states X and Y of an atom are depicted below: X : 1s²2s²2p⁶3s¹ Y : 1s²2s²2p⁶3s²3p⁶4s¹ Which of the following statements is not correct?

The formation of the oxide ion, O₂−(g), from oxygen atom requires first an exothermic and then an endothermic step as shown below : O(g) + e− → O−(g); ΔH° = −141 kJ mol−1 Ω−(g) + e− → O₂−(g); ΔH° = +780 kJ mol−1 Thus, process of formation of O₂− in gas phase is unfavourable even though O₂− is isoelectronic with neon. It is due to the fact that,

Which of the following reactions shows the reducing property of SO₂ ? (i) Cl₂ + SO₂ → SO₂Cl₂ (ii) 2H₂S + SO₂ → 3S + 2H₂O (iii) 2FeCl₃ + SO₂ + 2H₂O → 2FeCl₂ + H₂SO₄ + 2HCl (iv) SO₂ + H₂O → H₂SO₃

Which of the following is not a redox reaction?

KMnO₄ acts as an oxidising agent in alkaline medium. When alkaline KMnO₄ is treated with KI, iodine is oxidised to

Which of the following statements regarding Gibb's energy change is correct?

H₂O₂ + H₂O₂ → 2H₂O + O₂ is an example of disproportionation because:

Which is the correct relationship between ΔG° and equilibrium constant Kₚ?

CH = CH - CH₃ + HBr ⟶ X, X in the reaction is:

The solubility of BaSO₄ in water is 2.42 × 10⁻³ g L⁻¹ at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO₄ = 233 g mol⁻¹)

The correct order of N⁻compounds in its decreasing order of oxidation states is

In isolated system, find the condition for spontaneous reaction.

Assertion : CH₃ - CH = CH - CH₃, on reaction with alcoholic KOH gives CH₃CH = CHCH₃ as a result of dehydrohalogenation. Reason : Elimination reaction takes place in accordance with Markovnikov's rule.

Which of the following statement is correct?

When KMnO₄ is reduced with oxalic acid in acidic solution, the oxidation number of Mn changes from

The values of coefficients to balance the following reaction are Cr(OH)₃ + ClO⁻ + OH⁻ → CrO₄²⁻ + Cl⁻ + H₂O

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as: Assertion : Sn in +2 oxidation state is a reducing agent while Pb in +4 state is an oxidising agent. Reason : Inert pair effect is due to participation of s electrons in bond formation.

Which of the following sets of quantum numbers represents the highest energy of an atom?

Which of the following names is not correctly matched with the compound?

Identify the incorrect statement. The findings from the Bohr model for H⁻atom are

The major product formed in the following reaction is :

In the following structures, which one is having staggered conformation with maximum dihedral angle?

Which of the following is most stable?

For a reaction to be spontaneous at any temperature, the conditions are

Which of the following conformations of n-butane is the least stable?

The correct IUPAC nomenclature for the following compound is

On the basis of thermochemical equations (i), (ii) and (iii), find out which of the algebraic relationships given in options (a) to (d) is correct: (i) C(graphite) + O₂(g) → CO₂(g) ; ΔH = x kJ mol⁻¹ (ii) C(graphite) + 1/2O₂(g) → CO(g) ; ΔH = y kJ mol⁻¹ (iii) CO(g) + 1/2O₂(g) → CO₂(g) ; ΔH = z kJ mol⁻¹

On the basis of thermochemical equations (1), (2) and (3), find out which of the relationships given in options (a) to (d) is correct 1. C(graphite) + O₂(g) → CO₂(g); ΔH = x kJmol⁻¹ 2. C(graphite) + 1/2 Ω₂(g) → CO(g); ΔH = y kJmol⁻¹ 3. CO(g) + 1/2 Ω₂(g) → CO₂(g); ΔH = z kJmol⁻¹

An example of a disproportionation reaction is

Assertion: KMnO₄, KClO₄, and HNO₃ act as oxidants. Reason: In KMnO₄, KClO₄ and HNO₃ central atom is in its highest oxidation state.

Kₐ, Kₓ and Kₑ are the respective ionisation constants for the following reactions. H₂S ⇌ H⁺ + HS⁻ HS⁻ ⇌ H⁺ + S²⁻ H₂S ⇌ 2H⁺ + S²⁻ The correct relationship between Kₐ, Kₓ and Kₑ is

The number of radial nodes and angular nodes for d-orbital can be represented as

Identify disproportionation reaction

The most basic amine among the following is

If K₁ and K₂ are the respective equilibrium constants for the two reactions XeF₆(g) + H₂O(g) ⇌ XeOF₄(g) + 2HF(g) XeO₄(g) + XeF₆(g) ⇌ XeOF₄(g) + XeO₃F₂(g) The equilibrium constant of the reaction XeO₄(g) + 2HF(g) ⇌ XeOF₄(g) + H₂O(g) will be

Arrange the following compounds in order of their reactivity towards Sn₂ reaction.

The bond dissociation energies of X₂, Y₂ and XY are in the ratio of 1 : 0.5 : 1. ΔH for the formation of XY is –200 kJ mol⁻¹. The bond dissociation energy of X₂ will be

Consider the following reaction, Phenol → Z. The product Z is