Past paper 1 questions CHEM 2024- 15

Diffusion

Capillarity

Distillation

Evaporation

They can react with each other

They can form covalent compounds

They have the same number of electrons in their outer shells

The atomic number of sulfur is 16 and the relative atomic mass of oxygen is 16

Simple molecular

Macromolecular

Ionic crystals

Metallic

Particles cannot be easily compressed

Forces of attraction are very strong

Forces of attraction are very weak

Particles have a high density

Substance A (Boiling Point 1465 °C, Electrical Conductivity Solid: No, Aqueous: Yes)

Substance B (Boiling Point 444 °C, Electrical Conductivity Solid: No, Aqueous: No)

Substance C (Boiling Point 2600 °C, Electrical Conductivity Solid: Yes, Aqueous: No)

Substance D (Boiling Point -35 °C, Electrical Conductivity Solid: No, Aqueous: Yes)

one atom of the element

an element which contains 6.0 x 10^23 atoms

an element which occupies 24.0 dm^3 at STP

an element which combines completely with 12 g of carbon-12

Salt

Ester

Acid

Alkali

Solutions, colloids, suspensions

Solutions, suspensions, colloids

Colloids, solutions, suspensions

Suspensions, colloids, solutions

They give energy to products.

They release heat when they react.

They absorb energy to form products.

They cannot be converted into products.

Sulfur

Copper

Aqueous sodium chloride

Aqueous copper (II) sulfate