CBSE 12 Chemistry Question Paper-2022 Set-2 by Pavan | Practice Test to Test Your Knowledge
Students

Academic Programs

AI-powered learning for grades 8-12, aligned with major curricula

Engineering Courses
Professional

Professional Courses

Industry-relevant training in Business, Technology, and Design

Certifications
Games

Interactive Games

Fun games to boost memory, math, typing, and English skills

  2. Practice Tests
  3. CBSE 12 Chemistry Question Paper-2022 Set-2
CBSE 12 Chemistry Question Paper-2022 Set-2

CBSE 12 Chemistry Question Paper-2022 Set-2

This mock test includes actual CBSE Class 12 Chemistry board exam questions from the year 2022 Set-2, helping students understand exam trends and practice real paper format

2025-08-14
Pavan Pavan
CBSE Class 12 Chemistry 2022 Grade 12

Duration

25 min

Questions

23

Marking

Negative

You've not yet enrolled in this practice test. Please login to start practice test.

Questions Preview

How will you carry out the following conversions: Propanal to Propane?

A
Wurtz reaction
B
Clemmensen reduction
C
Tollens' test
D
Friedel-Crafts reaction

In the given reaction $N_2(g)+3H_2(g) o 2NH_3(g)$ the rate of formation of $NH_3$ is $3.6 \times 10^{-4}$ mol $L^{-1}s^{-1}$. Calculate the rate of reaction.

A
3.6 x 10⁻⁴ mol L⁻¹s⁻¹
B
1.2 x 10⁻⁴ mol L⁻¹s⁻¹
C
1.8 x 10⁻⁴ mol L⁻¹s⁻¹
D
7.2 x 10⁻⁴ mol L⁻¹s⁻¹

State Kohlrausch's law of independent migration of ions.

A
The molar conductivity of a strong electrolyte increases with dilution.
B
The limiting molar conductivity of an electrolyte is the sum of the limiting ionic conductivities of the cation and the anion.
C
The molar conductivity of an electrolyte is directly proportional to its concentration.
D
The conductivity of a solution depends on the nature of the solvent only.

Write the hybridisation and magnetic character of the complex $[NiCl_4]^{2-}$.

A
dsp² hybridization, diamagnetic
B
sp³ hybridization, diamagnetic
C
sp³ hybridization, paramagnetic
D
dsp² hybridization, paramagnetic

Out of $[Fe(NH_3)_6]^{3+}$ and $[Fe(C_2O_4)_3]^{3-}$, which complex is more stable and why?

A
$[Fe(C_2O_4)_3]^{3-}$ because of the chelate effect.
B
$[Fe(C_2O_4)_3]^{3-}$ because the oxalate ligand is a stronger ligand.
C
$[Fe(NH_3)_6]^{3+}$ because it has a higher coordination number.
D
$[Fe(NH_3)_6]^{3+}$ because ammonia is a neutral ligand.

Calculate the emf for the cell: $Zn(s)|Zn^{2+}(0.01 M)||(0.001 M)Ag^{+}|Ag(s)$ Given: $E^{\ominus}{Zn^{2+}/Zn} = -0.76 V$ and $E^{\ominus}{Ag^{+}/Ag} = +0.80 V$.

A
1.56 V
B
1.54 V
C
1.50 V
D
1.59 V

Define molar conductivity for the solution of an electrolyte. How does it vary with concentration?

A
It decreases with dilution as the number of ions per unit volume decreases.
B
It increases with dilution due to an increase in the degree of dissociation.
C
It increases with concentration due to increased ion-ion interaction.
D
It remains constant regardless of concentration.

In a reaction $2N_2O_5(g) \to 4NO_2(g)+O_2(g)$, the concentration of $N_2O_5$ decreases from 0.5 mol $L^{-1}$ to 0.4 mol $L^{-1}$ in 10 minutes. Calculate the average rate of this reaction.

A
5 x 10⁻³ mol L⁻¹min⁻¹
B
1 x 10⁻² mol L⁻¹min⁻¹
C
2 x 10⁻³ mol L⁻¹min⁻¹
D
4 x 10⁻³ mol L⁻¹min⁻¹

Account for the following: Zn, Cd and Hg are non-transition elements.

A
They have partially filled d-orbitals in their ground state.
B
They have completely filled d-orbitals in their ground state as well as in their common oxidation states.
C
They form colored ions in aqueous solution.
D
They exhibit multiple oxidation states.

Which of the following is the reason for $E^{\ominus}_{Mn^{2+}/Mn}$ value being more negative than others in the first transition series?

A
Higher enthalpy of atomisation
B
Stability of half-filled d⁵ subshell
C
Higher enthalpy of hydration
D
Lower ionization enthalpy

Which of the following describes the reason for Brownian motion in colloidal particles?

A
Gravitational forces on the colloidal particles.
B
Continuous bombardment of the dispersed phase particles by the molecules of the dispersion medium.
C
Electric charge on the colloidal particles.
D
Attraction between the colloidal particles.

A reaction is first order in X and second order in Y. How is the rate affected on increasing the concentration of Y three times?

A
The rate will be doubled.
B
The rate will be tripled.
C
The rate will be nine times.
D
The rate will be quadrupled.

The resistance and conductivity of a conductivity cell containing 0.001 M KCl solution at 298 K are 1200 Ω and $1.5 \times 10^{-4}$ S $cm^{-1}$. Calculate its cell constant.

A
0.18 $cm^{-1}$
B
1.2 $cm^{-1}$
C
0.25 $cm^{-1}$
D
0.15 $cm^{-1}$

Why is the oxidation of Propanal easier than Propanone?

A
Propanal has a carbonyl group, which is more susceptible to oxidation.
B
The carbonyl carbon in propanal is more electron-deficient.
C
Propanal has an oxidizable alpha-hydrogen atom.
D
Propanal has a hydrogen atom attached to the carbonyl carbon.

Write the units of 'k' for a zero-order reaction and a first-order reaction.

A
Zero-order: s⁻¹; First-order: mol L⁻¹ s⁻¹
B
Zero-order: mol⁻¹ L s⁻¹; First-order: s⁻¹
C
Zero-order: mol L⁻¹ s⁻¹; First-order: s⁻¹
D
Zero-order: s⁻¹; First-order: mol L⁻¹

If $\wedge_{m}$ and $\wedge_{m}^o$ for $CH_3COOH$ are 48 S cm² mol⁻¹ and 400 S cm² mol⁻¹ respectively, calculate the degree of dissociation ($\alpha$) of $CH_3COOH$.

A
0.12
B
0.08
C
0.24
D
0.15

Write the IUPAC name of the complex: $[Co(NH_3)_4(H_2O)Cl]Cl_2$.

A
Tetraammineaquachloridocobalt(III) chloride
B
Chloridotetraammineaquacobalt(II) chloride
C
Tetraamminechloridoaquacobalt(III) chloride
D
Ammineaquachloridotetraammine cobalt(III) chloride

Why does physisorption decrease with an increase in temperature?

A
It is an endothermic process.
B
The kinetic energy of gas molecules increases, causing them to escape the surface.
C
The activation energy of the process is very high.
D
The process is irreversible.

Which of the following describes the difference between Lyophobic sol and Lyophilic sol?

A
Lyophobic sols are reversible, while lyophilic sols are irreversible.
B
Lyophobic sols are more stable, while lyophilic sols are less stable.
C
Lyophobic sols are difficult to prepare, while lyophilic sols are easily prepared.
D
Lyophobic sols are solvent-attracting, while lyophilic sols are solvent-repelling.

Define the dispersed phase and dispersion medium of 'milk'.

A
Dispersed phase: Water; Dispersion medium: Fat
B
Dispersed phase: Fat; Dispersion medium: Water
C
Dispersed phase: Protein; Dispersion medium: Water
D
Dispersed phase: Water; Dispersion medium: Protein

Predict the product when $CH_3CN$ reacts with (a) DIBAL-H, and (b) $H_2O$.

A
Propanamine
B
Ethanol
C
Ethanoic acid
D
Ethanal

Why is the oxidation of Propanal easier than Propanone?

A
Propanal is a ketone, which is more easily oxidized.
B
Propanone has an alpha-hydrogen atom, which makes it less reactive.
C
Propanal has a hydrogen atom attached to the carbonyl carbon.
D
The carbonyl group in propanone is sterically hindered.

How will you distinguish between acetophenone and benzophenone?

A
Acetophenone gives a positive iodoform test, while benzophenone does not.
B
Benzophenone gives a positive Tollens' test, while acetophenone does not.
C
Acetophenone gives a positive Fehling's test, while benzophenone does not.
D
Both give a positive iodoform test, but only benzophenone gives a positive Tollens' test.