Across
- 5. A gas with the highest composition in the air, and also generally inert, non-metallic, colorless, odorless, and tasteless.
- 6. The substance collected on the filter paper during filtration process.
- 8. This measuring apparatus is used to transfer 50 cm^3 of dilute hydrochloric acid solution into a flask.
- 10. A gas which can be collected by both the displacement of air and the displacement of water.
- 11. A process that is suitable to separate solid-solid mixtures or a solid-liquid mixture which contains an insoluble solid.
- 12. These are added in distillation process to prevent bumping during boiling.
- 14. A process when a solid substance changes into a gas directly without melting.
- 15. A compound whose molecule is always formed by one carbon atom chemically joined with four hydrogen atoms.
Down
- 1. A pure substance that is made up of atoms of two or more elements chemically combined together.
- 2. A gas that can be collected via upward delivery because it is less dense than air and also highly soluble in water.
- 3. This measuring apparatus is used to measure the volume of a solution accurately to 0.1 cm^3.
- 4. A pure substance that cannot be broken down into any simpler substances by chemical methods.
- 7. Fractional distillation is used to separate liquid-liquid mixtures which are _____, which means they dissolve in each other.
- 9. This gas is collected via downward delivery because it is denser than air.
- 13. One of the methods used to recover a pure solid from a solution; however this method is used when a compound is not heat-stable.