Which action is an example of a chemical change?

Anonymous Student

2 months ago

Which action demonstrates a chemical change? a) Cooking an egg b) Shredding paper c) Evaporating water d) Breaking a stick

All replies

Expert Answer

2 months ago

Answer - Option a)

Solution - 

A chemical change is a transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these. It happens when two substances mix to create a new material. Food preparation involves a chemical transformation because cooked vegetables or raw materials cannot be recovered. High heat is used to transform the egg white/ yolk proteins into other proteins. Hence option a) is correct.

types:show 74 types...hide 74 types... acylation

the process of introducing an acyl group into a compound

agglutinating activity, agglutination

the coalescing of small particles that are suspended in solution; these larger masses are then (usually) precipitated

amylolysis

conversion of starch to sugar

association

(chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding

blueing, bluing

a process that makes something blue (or bluish)

calcification

a process that impregnates something with calcium (or calcium salts)

catalysis, contact action

acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction

chelation

the process of forming a ring by forming one or more hydrogen bonds

chemical reaction, reaction

(chemistry) a process in which one or more substances are changed into others

chlorination

the addition or substitution of chlorine in organic compounds

cleavage

the breaking of a chemical bond in a molecule resulting in smaller molecules

corroding, corrosion, erosion

erosion by chemical action

cracking

the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)

deamination, deaminization

removal of the amino radical from an amino acid or other amino compound

decalcification

loss of calcium from bones or teeth

decarboxylation

the process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen)

de-iodination

the removal of iodine atoms from organic compounds

demineralisation, demineralization

the removal of minerals and mineral salts from a liquid (especially from water)

desalination, desalinisation, desalinization

the removal of salt (especially from sea water)

digestion

the process of decomposing organic matter (as in sewage) by bacteria or by chemical action or heat

dissociation

(chemistry) the temporary or reversible process in which a molecule or ion is broken down into smaller molecules or ions

gasification

the process of changing into gas

gassing

the process of interacting with gas

hydrogenation

a chemical process that adds hydrogen atoms to an unsaturated oil

intumescence, intumescency, swelling

the increase in volume of certain substances when they are heated (often accompanied by release of water)

inversion

a chemical process in which the direction of optical rotation of a substance is reversed from dextrorotatory to levorotary or vice versa

iodination

the substitution or addition of iodine atoms in organic compounds

chemical mechanism, mechanism

the atomic process that occurs during a chemical reaction

nitrification

the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound)

peptisation, peptization

the process of converting to a sol; bringing to a colloidal solution

photosynthesis

synthesis of compounds with the aid of radiant energy (especially in plants)

polymerisation, polymerization

a chemical process that combines several monomers to form a polymer or polymeric compound

precipitation

the process of forming a chemical precipitate

proteolysis

the hydrolysis of proteins into peptides and amino acids by cleavage of their peptide bonds

pyrochemical process, pyrochemistry

processes for chemical reactions at high temperatures

sequestration

the action of forming a chelate or other stable compound with an ion or atom or molecule so that it is no longer available for reactions

synaeresis, syneresis

the separation of liquid from a gel that is caused by contraction (as in cheese making)

synthesis

the process of producing a chemical compound (usually by the union of simpler chemical compounds)

transamination

the process of transfering an amino group from one compound to another

transamination

the process of transposing an amino group within a chemical compound

ferment, fermentation, fermenting, zymolysis, zymosis

a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol

acetylation

the process of introducing an acetyl group into a compound

addition reaction

a chemical reaction in which one molecule is added to another

aldol reaction

a reaction of aldehydes resulting in an aldol

autocatalysis

catalysis in which the catalyst is one of the products of the reaction

biochemical mechanism

a chemical mechanism involved in vital processes occurring in living organisms

biogenesis, biosynthesis

production of a chemical compound by a living organism

bottom fermentation

a slow kind of alcoholic fermentation at a temperature low enough that the yeast cells can sink to the bottom of the fermenting liquid; used in the production of lager

chain reaction

a series of chemical reactions in which the product of one is a reactant in the next

chemical equilibrium, equilibrium

a chemical reaction and its reverse proceed at equal rates

chemosynthesis

synthesis of carbohydrate from carbon dioxide and water; limited to certain bacteria and fungi

chemical decomposition reaction, decomposition, decomposition reaction

(chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance

displacement, displacement reaction

(chemistry) a reaction in which an elementary substance displaces and sets free a constituent element from a compound

double decomposition, double decomposition reaction, metathesis

a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB)

elimination reaction

a chemical reaction in which a molecule decomposes to two different molecules

endothermic reaction

a chemical reaction accompanied by the absorption of heat

exothermic reaction

a chemical reaction accompanied by the evolution of heat

hydration

the process of combining with water; usually reversible

hydrocracking

the process whereby hydrocarbon molecules of petroleum are broken down into kerosene and gasolene by the addition of hydrogen under high pressure in the presence of a catalyst

hydrolysis

a chemical reaction in which water reacts with a compound to produce other compounds; involves the splitting of a bond and the addition of the hydrogen cation and the hydroxide anion from the water

neutralisation, neutralisation reaction, neutralization, neutralization reaction

a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water

nucleosynthesis

(astronomy) the cosmic synthesis of atoms more complex than the hydrogen atom

ossification

the calcification of soft tissue into a bonelike material

oxidation, oxidisation, oxidization

the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction

oxidation-reduction, oxidoreduction, redox

a reversible chemical reaction in which one reaction is an oxidation and the reverse is a reduction

photochemical reaction

a chemical reaction produced by the action of light

indentation, pitting, roughness

the formation of small pits in a surface as a consequence of corrosion

prechlorination

chlorination prior to another chemical process

reducing, reduction

any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent

rust, rusting

the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water

saponification

a chemical reaction in which an ester is heated with an alkali (especially the alkaline hydrolysis of a fat or oil to make soap)

solvation

a chemical process in which solvent molecules and molecules or ions of the solute combine to form a compound

top fermentation

a violent kind of alcoholic fermentation at a temperature high enough to carry the yeast cells to the top of the fermenting liquid; used in the production of ale

vinification

the process whereby fermentation changes grape juice into wine

What are 5 examples of a chemical change?

What are 4 examples of chemical changes?

What are 3 types of chemical changes?

Is an example of a chemical change *?