The solution mentions questions about classifying substances, naming forms of energy, and stating SI units. It also notes that questions about elements/radicals and a diagram-based question could not

Here are the answers to the questions from the image:

2. b) Classify the following substances into solid, liquid, or gas:

   • Solid: Salt, Soap
   • Liquid: Petrol, Paraffin
   • Gas: Carbon dioxide, Smoke

3. c) Name four forms of energy:

   • (i) Kinetic energy
   • (ii) Potential energy
   • (iii) Heat energy
   • (iv) Light energy

4. State the SI units of:

   • (i) current: Ampere (A)
   • (ii) energy: Joule (J)
   • (iii) force: Newton (N)
   • (iv) heat: Joule (J)
   • (v) mass: kilogram (kg)
   • (vi) power: Watt (W)
   • (vii) resistance: Ohm ($\Omega$)
   • (viii) temperature: Kelvin (K)
   • (ix) volume: cubic meter (m$^3$)
   • (x) work: Joule (J)

a) (elements and radicals with valency) and Question 5 (diagram-based question) cannot be answered as the full details are not visible in the image.