NEET Chemistry Class 12 Questions

Which of the following aqueous solutions should have the highest boiling point?

Calculate molarity of 63% w/w HNO₃ solution if density is 1.4 g/mL.

For the cell reaction : 2Cu⁺(aq) → Cu(s) + Cu²⁺(aq), the standard cell potential is 0.36 V. The equilibrium constant for the reaction is

2.82 g of glucose is dissolved in 30 g of water. The mole fraction of glucose in the solution is

The molar concentration of Cl⁻ ions in a solution obtained by mixing 300 mL of 0.3 M NaCl and 200 mL of 0.4 M BaCl₂ is

Given below are half-cell reactions: MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O; E° = +1.510 V 1/2 Ω₂ + 2H⁺ + 2e⁻ → H₂O₂; E° = +1.223 V Will the permanganate ion, MnO₄⁻ liberate O₂ from water in the presence of an acid?

Using the data given below find out the strongest reducing agent. E° Cr₂O₇²⁻/Cr³⁺ = 1.33V E° Cl₂/Cl⁻ = 1.36V E° MnO₄⁻/Mn²⁺ = 1.51V E° Cr³⁺/Cr = -0.74V

The reaction, 2X → Y + Z would be zero order reaction when

The quantity of charge required to obtain one mole of aluminium from Al₂O₃ is ......

According to Arrhenius equation rate constant k is equal to A e⁻ᴱᵃ/ᴿᵀ. Which of the following options represents the graph of ln k vs 1/T?

What will be the half-life of the first order reaction for which the value of rate constant is 200 s⁻¹?

Which of the following complexes formed by Cu²⁺ ions is most stable?

Rate law for the reaction A + 2B ⟶ C is found to be : Rate = k[A][B] Concentration of reactant ‘B’ is doubled, keeping the concentration of ‘A’ constant, the value of rate constant will be..........

Which of the following does not answer iodoform test?

Indicate the complex ion which shows geometrical isomerism.

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.

The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr³⁺ ion is

Assertion (A) : Actinoids form relatively less stable complexes as compared to lanthanoids. Reason (R) : Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.

Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is

Which of the following statements concerning lanthanide elements is false?

The correct IUPAC name of [Pt(NH₃)₂Cl₂] is

Which of the following acids is a vitamin?

Assertion : Co(IV) is known but Ni(IV) is not. Reason : Ni(IV) has d⁴ electronic configuration.

Assertion (A) : [Fe(CN)₆]³⁻ ion shows magnetic moment corresponding to two unpaired electrons. Reason (R) : Because it has d²sp³ type hybridisation.

The secondary structure of protein is stabilised by

Weak field ligands form high spin complexes due to (where Δ₀ is crystal field splitting and P = pairing energy)

The order of reactivity of following alcohols with halogen acids is ......... (A) CH₃CH₂ − CH₂ − OH (B) CH₃CH₂ − CH − OH | CH₃ (C) CH₃ | CH₃ − C − OH | CH₃

Reduction potentials of some ions are given below. Arrange them decreasing order of oxidising power.

Identify the compound Y in the following reaction.

Rate law for the reaction A + 2B → C is found to be Rate = k[A][B] Concentration of reactant 'B' is doubled, keeping the concentration of 'A' constant, the value of rate constant will be..........

The cell in which the following reaction occurs: 2Fe³⁺(aq) + 2I⁻(aq) → 2Fe²⁺(aq) + I₂(s) has E°cell = 0.236 V at 298 K. The equilibrium constant of the cell reaction is

Which of the following reactions does not take place?

Compounds 'A' and 'B' react according to the following chemical equation. A(g) + 2B(g) → C(g) Concentration of either 'A' or 'B' were changed keeping the concentrations of one of the reactants constant and rates were measured as a function of initial concentration. Following results were obtained. Choose the correct option for the rate equations for this reaction.

1 M, 2.5 litre NaOH solution is mixed with another 0.5 M, 3 litre NaOH solution. Then find out the molarity of resultant solution

E° cell = 1.1 V for Daniel cell. Which of the following expressions are correct description of state of equilibrium in this cell?

Amongst the following, the strongest base in aqueous medium is .........

Which of the following reactions will not yield phenol?

Given E°Ag⁺/Ag = +0.80 V ; E°Cu²⁺/Cu = +0.34 V ; E°Fe³⁺/Fe²⁺ = +0.76 V ; E°Ce⁴⁺/Ce³⁺ = +1.60 V Which of the following statements is not correct?

Λₘ⁰ for NaCl, HCl and NaA are 126.4, 425.9 and 100.5 S cm² mol⁻¹, respectively. If the conductivity of 0.001 M HA is 5 × 10⁻⁵ S cm⁻¹, degree of dissociation of HA is

The Henry's law constant for O₂ dissolved in water is 4.34 × 10⁴ atm at certain temperature. If the partial pressure of O₂ in a gas mixture that is in equilibrium with water is 0.434 atm, what is the mole fraction of O₂ in the solution?

Vapour pressure of benzene at 30°C is 121.8 mm. When 15 g of a non volatile solute is dissolved in 250 g of benzene, its vapour pressure decreased to 120.2 mm. The molecular weight of the solute (Mo. wt. of solvent = 78)

An organic compound (X) with molecular formula C₉H₁₀O gives positive 2,⁴⁻DNP and Tollens' tests. It undergoes Cannizzaro reaction and on vigorous oxidation it gives 1,⁴⁻benzenedicarboxylic acid. Compound (X) is

If the conductance and specific conductance of a solution are same, then its cell constant is equal to:

E° value of Ni²⁺/Ni is^{-0}.25 V and Ag⁺/Ag is +0.80 V. If a cell is made by taking the two electrodes what is the feasibility of the reaction?

For a general reaction X → Y, the plot of conc. Of X vs time is given in the figure. What is the order of the reaction and what are the units of rate constant?

Assertion: Etard reaction helps to stop the oxidation of toluene at the aldehyde stage. Reason: Chromyl chloride oxidises methyl group to a chromium complex, which on hydrolysis gives corresponding benzaldehyde.

A weak monobasic acid is 5% dissociated in 0.01 mol dm⁻³ solution. Limiting molar conductivity of acid at infinite dilution is 4 × 10⁻² Ω⁻¹ m² mol⁻¹. What will be the conductivity of 0.05 mol dm⁻³ solution of the acid?

For a chemical reaction, X → Y, the rate of reaction increases by a factor of 1.837 when the concentration of X is increased by 1.5 times, the order of the reaction with respect to X is:

Given below are two statements : Statement-I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole-dipole interactions. Statement-II : The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H⁻bonding. In the light of the above statements, choose the most appropriate answer from the options given below:

The specific conductivity of N/10 KCl solution at 20°C is 0.0212 Ω⁻¹ cm⁻¹ and the resistance of the cell containing this solution at 20°C is 55 Ω. The cell constant is