CBSE Chemistry is balanced equally across Physical (23 marks), Inorganic (14 marks), and Organic (33 marks).
1. Physical Chemistry: Formula Substitution Marks
Write the governing formula with units (e.g., $\Lambda_m = \frac{\kappa \times 1000}{M}$). Always convert cell conductivity $\kappa$ to $S\text{ cm}^{-1}$ and concentration to $mol\text{ L}^{-1}$ before calculating.
2. Organic Chemical Distinction Tests
Distinguishing pairs like Propanal vs Propanone (Tollens' test) or Phenol vs Benzoic acid ($NaHCO_3$ effervescence test) requires naming the reagent, describing the visible observation, and writing the balanced chemical equation.
