Write the chemical reaction where the following changes are observed : (a)Gas is evolved (b) Colour change is noticed (c) Precipitate is formed (d) Physical state of reactants is changed.
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Answer:
A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide. Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or explosive.
When two or more substances combine, they create one or more new substances, which sometimes have different molecular structures from the original substances, meaning they absorb and radiate light in different ways, leading to a color change.
A precipitation reaction refers to the formation of an insoluble salt when two solutions containing soluble salts are combined. The insoluble salt that falls out of solution is known as the precipitate, hence the reaction's name. Precipitation reactions can help determine the presence of various ions in solution.
A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. ... If a physical change occurs, the physical properties of a substance will change, but its chemical identity will remain the same.
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