Chemical Changes
Chemical Changes: Overview
This Topic covers sub-topics such as Fermentation, Chemical Reactions, Rusting of Iron, Chemical Changes, Hydrogenation of Vegetable Oils, Burning of Magnesium Ribbon, Burning of Coal, Change of Milk into Curd and, Reaction between Calcium Oxide and Water
Important Questions on Chemical Changes
Explain the application of fermentation in industries?
Is fermentation of grapes a chemical change? If yes then how?
The burning of magnesium ribbon will not produce any heat.
Give one example for a change in a substance’s colour during a chemical reaction.
When lime juice reacts with baking soda, it releases carbon dioxide gas.
Exposure of iron to water and air is a perfect condition for rusting.
Rusting is an electrochemical process.
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
Rusting involves an oxidation reaction.
If water is poured into calcium oxide, the product formed as a result of the combination reaction is _____.
The gas used in the manufacture of vegetable oils is
The gas used in hydrogenation of oils is
Why are metal articles electroplated?
