Question

Write the definitions for the following terms in *1 or 2 sentences*
• _Physical change_
• _Chemical change_
• _Sublimation_
• _Fractional distillation_
• _Hydrocarbons_
• _Rusting_
• _Combination reaction_
• _Decomposition reaction_
• _Displacement reaction_
• _Neutralization reaction​

Answer 1

1) hysical changes are changes affecting the form of a chemical substance, but not its chemical composition.

2)Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.

3) sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.

• 3) the process of separating the parts of a liquid mixture by heating it. As the temperature goes up, each part in turn becomes a gas, which then cools as it moves up a tube and can be collected as a gas.

• 4) a combination of a very light gas (hydrogen) and a substance that is found in all living things (carbon). Hydrocarbons are found in petrol, coal and natural gas.

5) Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture.

• 6) A combination reaction is a reaction where two or more elements or compounds combine to form a single compound. Such reactions are represented by equations of the following form: X + Y → XY.

• 7) into two or more fragments. Chemical decomposition is usually regarded and defined as the exact opposite of chemical synthesis. In short, the chemical reaction in which two or more products are formed from a single reactant is called a decomposition reaction.

• 8) A single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound.

• 9!) In chemistry, neutralization or neutralisation is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution

hope it helps you....

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Answer 2

Answer:

I'm Sorry, because I am not able to give you the definition of all these terms. I only know the definition of a few terms given above.

Explanation:

Physical Change

It a process in which the arrangement of molecules within the substance changes. This is a temporary change and is reversible.

Chemical Change

It is a process in which one substance gets completely transformed into a new substance, that is, new molecules are formed ( molecular composition changes ). This change is permanent and is irreversible.

Sublimation

The process in which a solid, when heated, directly changes into gas is called sublimation.

Fractional Distillation

It is a process through which two components having very small difference in their boiling points are separated.