EARTH SCIENCE
MAGNETISM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
unusual color change, gas is produced
|
|
|
new substance that can’t be reversed
|
|
|
heat is lost or created
|
|
|
All of the above
|
Detailed explanation-1: -Color Change. Production of an odor. Change of Temperature. Evolution of a gas (formation of bubbles) Precipitate (formation of a solid) 02-Apr-2021
Detailed explanation-2: -Examples of chemical changes include baking soda and vinegar creating carbon dioxide, iron rusting, and wood burning. The body creates a variety of chemical reactions as well, including the metabolization of food and the combination of sugar and saliva creating amylase.
Detailed explanation-3: -A chemical change can be indicated by a change in colour, change in temperature (exothermic or endothermic), change in smell, formation of a precipitate, or the formation of gas bubbles.
Detailed explanation-4: -Gas Bubbles Appear. Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas. Formation of a Precipitate. Color Change. Temperature Change. Production of Light. Volume Change. Change in Smell or Taste. 28-Apr-2018
Detailed explanation-5: -Bubbles of gas appear. Gas-producing reactions run to completion when the gas can leave the reaction mixture. A precipitate forms. A color change occurs. The temperature changes. Light is emitted. A change in volume occurs. A change in electrical conductivity occurs. A change in melting point or boiling point occurs. More items