RE-NEET Chemistry Class 12 Questions
44 questions
The standard electrode potential (E°) for the half-cell reaction Fe³⁺ + e⁻ → Fe²⁺ at 298 K is
(Given: E°(Fe³⁺/Fe) = -0.04 V and E°(Fe²⁺/Fe) = -0.44 V at 298 K)
For a salt XY, which is a strong electrolyte, the plot of Λₘ versus √C has a slope of −90.0 S cm² mol⁻³/² L¹/² at 298 K. At 0.01 M concentration of XY, the value of Λₘ is 145.0 S cm² mol⁻¹. The limiting molar conductivity of Y⁻ ion (Λ⁰ᵧ⁻, in S cm² mol⁻¹) at 298 K will be
(Given: Λ⁰ₓ⁺ = 74.0 S cm² mol⁻¹)
According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength is
Given below are two statements: Statement-I: [Fe(ox)₃]³⁻ is chiral. Statement-II: trans-[Cr(H₂O)₂(ox)₂]⁻ is chiral. (Given: oxH₂ = HOOC - COOH) In light of the above statements, choose the most appropriate answer from the options given below:
For an elementary chemical reaction, the Arrhenius plot is given below. If the energy of activation is 6.64 kJ mol⁻¹ and R = 8.3 J K⁻¹ mol⁻¹, the temperature at which the rate constant becomes e² min⁻¹ is
Consider the following statements about the solutions formed by mixing two liquids.
A. An ideal solution thus formed obeys Raoult’s law throughout the composition range.
B. Mixture of chloroform and acetone shows negative deviation from Raoult’s law.
C. Mixture of aniline and phenol shows positive deviation from Raoult’s law.
The green paramagnetic species formed by heating KMnO₄ at 513 K is
The correct statement about peptides and proteins is
2A → B is a zero-order reaction, where k = 1.0 mol L⁻¹ min⁻¹. If the initial concentration of A is 2 M, then the time taken to complete 75% of the reaction will be
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Generally, 3d transition metals have high melting points. Reason R: Involvement of 3d-electrons in addition to 4s-electrons in the interatomic metallic bonding.
In light of the above statements, choose the most appropriate answer from the options given below:
Identify the reactions which give aniline as the major product.
Among the species given below, the spin-only magnetic moment is highest for (Given: Atomic number of Ti = 22, Mn = 25, Fe = 26 and Co = 27)
The complex which has facial and meridional isomers is (Given: py = pyridine and en = H₂N-CH₂-CH₂-NH₂)
A 1:3 electrolyte in an aqueous solution is
The lanthanide ion having four unpaired electrons is (Given: Atomic numbers of Ce=58, Nd=60, Tb=65 and Ho=67)
The formula of tetraammineaquachloridocobalt(III) chloride is
Assertion A: For an ideal solution formed by mixing liquids P and Q, Δ_mix H = 0 and Δ_mix V = 0. Reason R: No interactions occur between P and Q. In the light of the above statements, choose the most appropriate answer from the options given below.
Match the vitamins in List I with their sources in List II.
The correct order of solubility of the given salts in water at 298 K is
In potash alum, the ratio of K⁺ and SO₄²⁻ ions is
Following data is for a reaction between reactants A and B:
Rate [A] [B] mol L⁻¹ s⁻¹ 2 × 10⁻³ 0.1 M 0.1 M 4 × 10⁻³ 0.2 M 0.1 M 1.6 × 10⁻² 0.2 M 0.2 M
The order of the reaction with respect to A and B, respectively, are
Given below are two statements:
Statement I: Propene on treatment with diborane gives an addition product with the formula ((CH₃)₂ – CH – ₃B).
Statement II: Oxidation of ((CH₃)₂ – CH – ₃B with hydrogen peroxide in presence of NaOH gives propa-ol.
In the light of the above statements, choose the most appropriate answer from the options given below:
Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?
From the following select the one which is not an example of corrosion.
Which of the following pairs of ions will have same spin only magnetic moment values within the pair?
Arrange the following compounds in increasing order of their solubilities in chloroform: NaCl, CH₃OH, cyclohexane, CH₃CN
Which of the following set of ions act as oxidising agents?
The UV⁻visible absorption bands in the spectra of lanthanoid ions are 'X', probably because of the excitation of electrons involving 'Y'. The 'X' and 'Y', respectively, are:
Ethylene diaminetetraacetate ion is a/an:
The amount of glucose required to prepare 250 mL of M/20 aqueous solution is: (Molar mass of glucose: 180 g mol⁻¹)
Identify the incorrect statement from the following:
Which of the following is not an ambidentate ligand?
The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is:
Which of the following plot represents the variation of ln k versus 1/T in accordance with Arrhenius equation?
Given below are two statements:
Statement I: Glycogen is similar to amylose in its structure.
Statement II: Glycogen is found in yeast and fungi also.
In the light of the above statements, choose the correct answer from the options given below:
Identify D in the following sequence of reactions: CH₃CH₂OH A B C D (major)
Match List-I with List-II:
The standard cell potential of the following cell Zn|Zn²⁺ (aq)|Fe²⁺(aq)|Fe is 0.32 V. Calculate the standard Gibbs energy change for the reaction : Zn(s) + Fe²⁺(aq) → Zn²⁺(aq) + Fe(s) (Given : 1 F = 96487 C)
Match List-I with List-II:
The following reaction method is not suitable for the preparation of the corresponding haloarene products, due to high reactivity of halogen, when X is:
The alkane that can be oxidized to the corresponding alcohol by KMnO₄ as per the equation is, when:
Rate constants of a reaction at 500 K and 700 K are 0.04 s⁻¹ and 0.14 s⁻¹, respectively; then, activation energy of the reaction is: (Given: log3.5 = 0.5441, R = 8.31 J K⁻¹ mol⁻¹)
Mass of glucose (C₆H₁₂O₆) required to be dissolved to prepare one litre of its solution which is isotone with 15 g L⁻¹ solution of urea (NH₂CONH₂) is (Given: Molar mass in g mol⁻¹ C : 12, H : 1, O : 16, N : 14)
[Mn₂(CO)₁₀] and [Co₂(CO)₈] structures have
A. Metal-Metal linkage
B. Terminal CO groups
C. Bridging CO groups
D. Metal in zero oxidation state Choose the correct answer from the options given below