Question

.Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a
(1 Point)

physical change that can be reversed

chemical change that can be reversed

physical change that cannot be reversed

chemical change that cannot be reversed.

Answer 1

$\mathfrak\pink{Answer \ :-}$

$\sf\blue{★}$Physical change that can be reversed.

• Forming crystals of a substance from its solution is known as crystallisation. It is a physical process and can be reversed.

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• Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.

• Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

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• A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed.

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• It results when a substance combines with another to form a new substance (synthesis or either decomposes to form more substances).

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Examples :-

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Burning wood.

Souring milk.

Mixing acid and base.

Digesting food.

Cooking an egg.

Heating sugar to form caramel.

Baking a cake.

Rusting of iron.