-
Liquids 'X' and 'Y' form an ideal solution with vapour pressures of 120 mm Hg and 160 mm Hg, respectively. Calculate the vapour pressure of the solution containing equal moles of 'X' and ‘Y’.
-
Calculate the mass of CaCl2 (molar mass = 111 g mol⁻¹) to be dissolved in 500 g of water to lower its freezing point by 2K, assuming that CaCl2 undergoes complete dissociation. (Kf for water = 1.86 K kg mol⁻¹)
-
At 25°C, the saturated vapour pressure of water is 24 mm Hg. Find the saturated vapour pressure of a 5% aqueous solution of urea at the same temperature (Molar mass of urea = 60 g mol⁻¹).
-
The standard electrode potential for Sn4+/Sn2+ is +0.15 ,V and for Cr3+/Cr is -0.74 V. Calculate the cell potential when these two couples are connected in their standard states.
-
Calculate the cell voltage of the voltaic cell joined by Al/Al3+ (0.001 M) and Ni/Ni2+ (0.1 M) half-cells at 25°C (Given ENi2+/Nio=−0.25 V and EAl3+/Alo=−1.66 V).
-
Given Λmo for NH4Cl, NaOH, and NaCl are 129.8, 217.4, and 108.9 S cm$^2$ mol⁻¹, respectively. Calculate the degree of dissociation (α) of a 1×10−2 M solution of NH4OH with a molar conductivity of 9.33 S cm$^2$ mol$^{-1}$.
-
The resistance of a conductivity cell filled with 0.2 mol L$^{-1}$ KCl is 200 Ω. If the resistance is 620 Ω when filled with 0.05 mol L$^{-1}$ KCl, calculate the conductivity and molar conductivity of the 0.05 mol L$^{-1}$ solution.
-
Determine the charge required for the reduction of 1 mol of MnO4− to MnO2.
-
Calculate how many seconds it requires to reduce 3 moles of Fe3+ to Fe2+ with a 2A current.
-
The decomposition of NH3 on a platinum surface is a zero-order reaction. Calculate the rates of N2 and H2 if k=2.5×10−4 mol L$^{-1}$ s$^{-1}$.
Download - CBSE Class 12 Question Bank
CBSE Class 12 Chemistry Board Exam 2026 Important Questions PDF Download
In numericals, the more you practice, the better your score can be. Here is the Important Questions PDF for CBSE Class 12 Chemistry Board Exam 2026, which includes important numericals and solutions. This PDF is helpful for:
-
Last-minute quick revision
-
Practicing board-level numericals
-
Understanding step-by-step solutions
Download CBSE Class 12 Chemistry Board Exam 2026 Important Questions PDF - Click Here
Class 12 Physical Chemistry Important Numerical for CBSE Boards 2026
You can also watch the detailed explanation session for Class 12 Physical Chemistry numericals on YouTube. The video covers:
-
Step-by-step solution approach to PYQs
-
Formula revision for quick recall
-
Strategy to attempt numericals
-
Tips and tricks for board examsIf you prefer visual learning, this video revision session for the CBSE Class 12 Chemistry Board Exam 2026 will help you understand tricky concepts in a simplified manner.