AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Two physical properties used to distinguish metals from non-metals are lustre (metals have a shiny surface) and electrical conductivity (metals are good conductors, non-metals are not).
Source: Chapter 3, Section 3.1 Physical Properties
The examiner expects any two valid physical properties from: lustre, malleability, ductility, conductivity of heat/electricity, or sonority. Lustre and electrical conductivity are the most commonly cited pair. Stating just the property name without a brief qualifier may cost half a mark, so include a one-phrase distinction for each.