Chemistry Questions

The highest occupied molecular orbital for Ne₂ is

Arrange the following compounds in the increasing order of polarity A. CH₃CH₂OCH₂CH₃ B. CH₃CH₂OH C. CH₃COCH₃ D. CH₃COOH Choose the correct answer from the options given below :

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

A 1 : 3 electrolyte in an aqueous solution is

Consider the following reaction, and choose the correct option.

The green paramagnetic species formed by heating KMnO₄ at 513 K is

Given below are two statements: **Statement-I :** Oxidation of p-nitrotoluene with acidic KMnO₄ gives an acid that is stronger than benzoic acid. **Statement-II :** Reduction of p-nitrotoluene with Sn/HCl followed by neutralization gives an amine tha

Among the following, the compound having conjugated double bonds is

The correct decreasing order of oxidation state of the underlined atom in each molecule is

Match the vitamins in List-I with their sources in List-II. List-I A. Vitamin A B. Vitamin B₁₂ C. Vitamin E D. Vitamin K List-II I. Meat II. Sunflower oil III. Green leafy vegetables IV. Carrots Choose the correct answer from the options given below.

Choose the correct answer from the options given below.

The complex which has facial and meridional isomers is (Given: py = pyridine and en = H₂N–CH₂–CH₂–NH₂)

Consider the following reaction sequences and choose the correct option

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. In the light of the above stateme

Match the species in List-I with their geometry in List-II List-I A. PCl₅ B. BrF₅ C. BF₄⁻ D. [Ni(CN)₄]²⁻ List-II I. Tetrahedral II. Square Planar III. Trigonal bipyramidal IV. Square pyramidal Choose the correct answer from the options given below:

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 mo

The correct statement is

One of the products formed in the following reaction 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

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The first ionization enthalpy of O is lower than that of N and F. Reason R : The loss of an electron from O leads to stable half-fill

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

The formula of tetraammineaquachloridocobalt(III) chloride is

The lanthanide ion having four unpaired electrons is (Given : Atomic number of Ce = 58, Nd = 60, Tb = 65 and Ho = 67)

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)

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 t

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

The amount of carbon dioxide evolved upon complete combustion of 116 g of n-butane is (Given : atomic mass in amu H = 1, C = 12 and O = 16)

For a salt XY, which is a strong electrolyte, the plot of Λm versus √c has a slope of −90.0 S cm² mol⁻³ᐟ² L¹ᐟ² at 298 K. At 0.01 M concentration of XY, the values of Λm is 145.S cm² mol⁻¹. The limiting molar conductivity of Y⁻ ion (λ°Y⁻, in S cm² mol

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 i

2A ⟶(k) 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

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

According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength 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

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)

The amino acid that gives a red-blood colour on treating its sodium fusion extract with sodium nitroprusside is

Assertion A: For an ideal solution formed by mixing liquids P and Q, ΔmixH = 0 and ΔmixV = 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.

Among the following options, the correct trend in the electron gain enthalpy is

The correct order of solubility of the given salts in water at 298 K is

The numbers 17.0145 and 21.0235 were rounded to three figures after the decimal point. The resulting numbers, respectively, are

The correct statement about peptides and proteins is

In potash alum, the ratio of K⁺ and SO₄²⁻ ions is

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

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 the following reaction sequence, choose the correct option