Answer: Displacement reaction
Explanation: Displacement reaction is a reaction in which elements higher in the activity series displaces those lower in the activity series in a compound. For example, the reaction between zinc and hydrochloric acid.
Zn + 2HCl —> ZnCl2 + H2
Zn displaces H2 from acid because Zn is higher than hydrogen in the activity series.
Answer: D. Roots
Explanation:
Sophie said that the part in question does not belong to an animal. This therefore invalidates options B and C as only animals would have lungs or legs.
Sophie then says that the part does not grow in the direction of light so that removes stems as the correct option because stems grow towards light in order to allow leaves to carry out photosynthesis.
Roots on the other hand grow towards gravity so they grow away from light which means that the correct answer is roots.
Answer:
- have high melting and boiling points
- are hard
- are good conductors of electricity when dissolved in water
Explanation:
Ionic compounds are compounds that are formed between a metal and non-metal with a significant electronegativity difference. The metals transfers their electrons to the non-metals and the electrostatic attraction of the ions brings about the bonding that forms the compound.
Ionic compounds are diverse in nature and form.
Here are some of their properties:
- They are usually hard solids with a high melting point or liquids with high boiling points
- They are soluble in water and non-soluble in non-polar solvents
- They are able to conduct electricity in molten form.
- They undergo very fast reaction in aqueous solutions.
Red is the answer in the blank
This means that they mixed .
