SCIENCE
CHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
a strong smell
|
|
|
heat and light
|
|
|
bubbling and fizzing
|
|
|
a solid compound
|
Detailed explanation-1: -Sugar is made of carbon, hydrogen and oxygen atoms. When heated over a candle, these elements react with the fire to turn into a liquid. The heat causes the sugar’s atoms to combine with the oxygen in the air, forming new groups of atoms. Energy is released in this chemical reaction in the form of smoke and black soot.
Detailed explanation-2: -Recap: caramelisation occurs when table sugar (sucrose) is heated at a high temperature.
Detailed explanation-3: -are responsible for the characteristic ‘caramel smell’. When granulated sugar is first heated, it begins to melt. As it melts, its color starts to change from white to golden brown, and then to dark brown (if you continue heating it).
Detailed explanation-4: -Burning of sugar is a chemical change because on burning sugar it yields carbon dioxide and water.
Detailed explanation-5: -When sugar is heated continuously then a black powdery substance is formed. The substance is known as Charred sugar. This is a chemical change.