AIPMT Prelims Chemistry Class 11 Questions

Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value?

Which one of the following pairs is isostructural (i.e. having the same shape and hybridization)?

pH of a saturated solution of Ba(OH)₂ is 12. The value of solubility product (Kₛₚ) of Ba(OH)₂ is

Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is:

In which of the following compounds, nitrogen exhibits highest oxidation state?

Maximum number of electrons in a subshell with l = 3 and n = 4 is:

The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is

A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?

Which of the following statements is not valid for oxoacids of phosphorus?

Which of the following acids does not exhibit optical isomerism?

Which nomenclature is not according to IUPAC system?

Which of the following species contains three bond pairs and one lone pair around the central atom?

Among the following compounds the one that is most reactive towards electrophilic nitration is:

Identify the wrong statement in the following:

When Cl₂ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

Predict the products in the given reaction

The wavelength of the first line of Lyman series for hydrogen atom is equal to that of the second line of Balmer series for a hydrogen like ion. The atomic number Z of hydrogen like ion is

The number of atomic orbitals in the fourth energy level of an atom is

A buffer solution is prepared in which the concentration of NH₃ is 0.30 M and the concentration of NH₄⁺ is 0.20 M. If the equilibrium constant, Kb for NH₃ equals 1.8 × 10⁻⁵, what is the pH of this solution?

For the reaction N₂(g) + O₂(g) ⇌ 2NO(g), the equilibrium constant is K₁. The equilibrium constant is K₂ for the reaction 2NO(g) + O₂(g) ⇌ 2NO₂(g). What is K for the reaction NO₂(g) ⇌ ½ N₂(g) + ½ O₂(g)?

If n = 6, the correct sequence of filling of electrons will be

The correct order of increasing bond length of C−H, C−O, C−C and C=C is

Acidified K₂Cr₂O₇ solution turns green when Na₂SO₃ is added to it. This is due to the formation of

Which of the pairs given below have the geometry that is explained by the same hybridization of orbitals, NO₂⁻, NO₃⁻, NH₂⁻, NH₄⁺, SCN⁻?

Which of the following is least likely to behave as Lewis base?

Name the type of the structure of silicate in which one oxygen atom of [SiO₄]⁴⁻ is shared?

Which of the following has the minimum bond length?

What is the product obtained in the following reaction:

[Image of reaction: Nitrobenzene with Zn, NH₄Cl in neutral medium]

In Dumas method of estimation of nitrogen, 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at 300 K = 15 mm)

Which one of the following is most reactive towards electrophilic reagent?

Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear?

In the following sections :

The structure is:

Which of the following pairs has the same size?

In a buffer solution containing equal concentration of B⁻ and HB, the Kb for B⁻ is 10⁻¹⁰. The pH of buffer solution is

What is [H⁺] in mol/L of a solution that is 0.20 M in CH₃COONa and 0.10 M in CH₃COOH? Ka for CH₃COOH = 1.8 × 10⁻⁵.

Which one of the following species does not exist under normal conditions?

In which of the following reactions, Kₚ and Kc are not equal?

If pH of a saturated solution of Ba(OH)₂ is 12, the value of its Kₛₚ is

The correct order of increasing bond angles in the following species is

Which one of the following compounds is a peroxide?

In which of the following pairs of molecules, the central atoms have sp² hybridization?

The correct order of the decreasing ionic radii among the following isoelectronic species is

The number of atoms in 0.1 mol of a triatomic gas is (N_A = 6.02 × 10²³ mol⁻¹)

The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acid decreases in the sequence

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl?

In which one of the following species the central atom has the type of hybridisation which is not the same as that present in the other three?

Which of the following molecules acts as a Lewis acid?

Liquid hydrocarbons can be converted to a mixture gaseous hydrocarbons by

In a set of reactions, ethyl benzene yielded a product D. 'D' would be