AIPMT-PRELIMS Chemistry Questions

CH₃CHO and C₂H₅CH₂CHO can be distinguished chemically by

Pₐ and P_b are the vapour pressures of pure liquid components A and B, respectively of an ideal binary solution. If xₐ represents the mole fraction of component A, the total pressure of the solution will be

Which one of the following is not a condensation polymer?

A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is :

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

In the following reaction:

Limiting molar conductivity of NH₄OH (i.e., Λₘ(NH₄OH)) is equal to:

Which of the following is a mineral of iron?

In Freundlich Adsorption isotherm, the value of 1/n is:

Identify the alloy containing a non-metal as a constituent in it.

Buffer solutions have constant acidity and alkalinity because:

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

50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36, the molecular mass of gas A will be

The protecting power of lyophilic colloidal sol is expressed in terms of

Deficiency of vitamin B₁ causes the disease

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

The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order:

Which one of the following statements is incorrect about enzyme catalysis?

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

Bond order of 1.5 is shown by:

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

In a reaction, A + B → Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled, rate law for the reaction can be written as:

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 one of the following sets of monosaccharides forms sucrose?

Which one of the following statements regarding photochemical smog is not correct?

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

In the following sequence of reactions CH₃Br →A →B →C, the end product (C) is

Which of the following acids does not exhibit optical isomerism?

Which nomenclature is not according to IUPAC system?

The pair of species with the same bond order is

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:

The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is:

Aluminium is extracted from alumina (Al₂O₃) by electrolysis of a molten mixture of:

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

Which of the following statements is false?

The number of octahedral void(s) per atom present in a cubic close-packed structure is

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

Identify the wrong statement in the following:

In a zero-order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become:

Which of the statements is not true?

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

Which one of the alkali metals, forms only, the normal oxide, M₂O on heating in air?

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

Sulphur trioxide can be obtained by which of the following reaction:

A single strand of nucleic acid tagged with a radioactive molecule is called

Measuring Biochemical Oxygen Demand (BOD) is a method used for

Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component “X” in it.