Let's determine the correct mappings by understanding the definitions and relationships between the terms given. We need to match each lettered item on the left with the correct lettered description on the right.
1. Pasteurization:
- Definition: Pasteurization is a process of heating food and liquids to a specific temperature to kill harmful microorganisms without changing the chemical structure of the product.
- Matching Description: Since pasteurization doesn’t change the chemical composition of the product, it is a physical change.
- Answer: Pasteurization matches with ‘Physical change’.
2. Rusting of Iron:
- Definition: Rusting of Iron is a chemical process where iron reacts with oxygen and moisture in the environment to form a new compound, iron oxide (rust).
- Matching Description: This process involves iron (Fe) reacting with oxygen (O2) and moisture to form rust. Hence, the corresponding description involves Iron and Oxygen (moisture).
- Answer: Rusting of Iron matches with ‘Iron + Oxygen (moisture)’.
3. Chemical Equation:
- Definition: A chemical equation is a symbolic representation of a chemical reaction where the reactants and products are expressed in terms of their respective chemical formulas.
- Matching Description: A chemical equation represents a chemical change, where substances transform into different substances.
- Answer: Chemical Equation matches with ‘Chemical change’.
4. Formation of zinc oxide:
- Definition: This refers to the chemical reaction where zinc (Zn) reacts with oxygen (O2) to form zinc oxide (ZnO). However, the given chemical equation describes the formation of magnesium oxide (MgO) instead.
- Matching Description: By the context, this should match with the reaction: [tex]\( 2 Mg + O_2 \rightarrow 2 MgO \)[/tex], even though it's for magnesium oxide, it’s supposed to match the equation provided.
- Answer: Formation of zinc oxide matches with ‘[tex]\( Mg + O_2 \rightarrow 2 MgO \)[/tex]’.
Now, let's compile these mappings in their concise forms:
- a) Pasteurization -> p) Physical change
- b) Rusting of Iron -> q) Iron + Oxygen (moisture)
- c) Chemical Equation -> r) Chemical change
- d) Formation of zinc oxide -> s) [tex]\( Mg + O_2 \rightarrow 2 MgO \)[/tex]
Hence, the final matched pairs are:
- a: p
- b: q
- c: r
- d: s
