Which one of the following changes is most appropriately classified as a physical change with underlying chemical interaction reversible on conditions?
Setting of plaster of Paris
Setting of plaster of Paris involves a chemical reaction with water to form gypsum, yet this hydration reaction can be reversed by heating, which drives off the water and regenerates plaster of Paris, making it chemically driven but reversible under changed conditions. Curdling of milk and burning of magnesium, by contrast, are essentially irreversible chemical changes, while magnetisation of iron involves no chemical interaction at all.
Similar Questions
Reactivity series of metals is mainly based on tendency to:
A displacement reaction will most likely occur when:
Corrosion of metals is minimised in practice by:
Rusting of iron in presence of moist air is an example of:
Important Questions from Chemical Reaction
An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions?
Copper sulphate crystals available in the market are blue coloured crystals. By careful heating, they turn to white colour. Which one of the following is responsible for the blue colour?
Airbags work on the principle of a chemical reaction triggered by the impact producing a gaseous product that causes a sudden volume change. Which one among the following chemical conversions is responsible for this?
Which one of the following is the correct reactivity series with water?
Silver artefacts get tarnished in air due to the formation of
