AIPMT Prelims Chemistry Class 12 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

In the following reaction:

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

Buffer solutions have constant acidity and alkalinity because:

Deficiency of vitamin B₁ causes the disease

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

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:

Which one of the following sets of monosaccharides forms sucrose?

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?

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

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.

The electrode potentials for Cu²⁺(aq) + e⁻ → Cu⁺(aq) and Cu⁺(aq) + e⁻ → Cu(s) are +0.15 V and +0.50 V respectively. The value of E° for Cu²⁺/Cu will be

Mole fraction of the solute in a 1.00 molal aqueous solution is

The van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively

Standard electrode potential for Sn⁴⁺/Sn²⁺ couple is +0.15 V and that for the Cr³⁺/Cr couple is −0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be

If the E°cell for a given reaction has a negative value, then which of the following gives the correct relationships for the values of ΔG° and Keq?

The freezing point depression constant for water is –1.86°Cm⁻¹. If 5.00 g Na₂SO₄ is dissolved in 45.0 g H₂O, the freezing point is changed by –3.82°C. Calculate the van't Hoff factor for Na₂SO₄.

Standard electrode potential of three metals X, Y and Z are –1.2 V, +0.5 V and –3.0 V respectively. The reducing power of these metals will be

Which one of the following statements for the order of a reaction is incorrect?

For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?

The complex, [Pt (Py) (NH₃) Br Cl ] will have how many geometrical isomers?

The complexes [Co(NH₃)₆] [Co(CN)₆] are the examples of which type of isomerism?

The d-electron configurations of Cr²⁺, Mn²⁺, Fe²⁺ and Co²⁺ are d⁴, d⁵, d⁶ and d⁷ respectively. Which one of the following will exhibit minimum paramagnetic behaviour?

Of the following complex ions, which is diamagnetic in nature?

In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D.

[Image of reaction sequence: m-bromobenzoic acid with SOCl₂, NH₃, NaOH, Br₂]

Which one is a nucleophilic substitution reaction among the following?

The Lassaigne's extract is boiled with conc. HNO₃ while testing for halogens. By doing so it.

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

Which one of the following statements is not true regarding (+) Lactose?

Which one of the following structural formulae of two organic compounds is correctly identified along with its related function?

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

25.3 g of sodium carbonate, Na₂CO₃ is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, Na⁺ and carbonate ions, CO₃²⁻ are respectively (Molar mass of Na₂CO₃ = 106 g mol⁻¹)

An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?

For the reaction N₂O₅(g) → 2NO₂(g) + 1/2 Ω₂(g) the value of rate of disappearance of N₂O₅ is given as 6.25 × 10⁻³ mol L⁻¹s⁻¹. The rate of formation of NO₂ and O₂ is given respectively as:

During the kinetic study of the reaction 2A + B → C + D, following results were obtained:

For the reduction of silver ions with copper metal, the standard cell potential was found to be +0.46 V at 25°C. The value of standard Gibbs energy, ΔG⁰ will be (F = 96500 C mol⁻¹)

For an endothermic reaction, energy of activation is Eₐ and enthalpy of reaction is ΔH (both of these in kJ/mol). Minimum value of Eₐ will be

Which one of the following ions has electronic configuration [Ar]₃d⁶?

Which of the following ions will exhibit colour in aqueous solutions?

Which of the following complex ion is not expected to absorb visible light?

The existence of two different coloured complexes with the composition of [Co(NH₃)₄Cl₂]⁺ is due to

Oxidation states of phosphorus in H₄P₂O₅, H₄P₂O₆ and H₄P₂O₇ are respectively

Crystal field stabilization energy for high spin d⁴ octahedral complex is

Aniline in a set of the following reactions yielded a coloured product Y. The structure of Y would be

The reaction of toluene with Cl₂ in presence of FeCl₃ gives X and reaction in presence of light gives Y. Thus, X and Y are

Which one of the following does not exhibit the phenomenon of mutarotation?

Which of these is most reactive towards Sₙ1 reaction?

Which of the following statements for tertiary amines is ‘False’?