Question

Which of these is a example of chemical change?

A: dissolving two cups of flour in a liter of water

B: pouring water from a large through into a beaker

C: deceasing the motion of water molecules by freezing

D: forming oxygen by bubbling fluorine water

Answer 1

option d) forming oxygen by bubbling fluorine water

Answer 2

Hey dear here is your answer!!!!!

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When is a change said to be a chemical change ?

--> It is when a new substance is formed due to change in properties of the reactants.

Here, we observe:-

• Flour is dissolved in water, here we see that no change in chemical properties is observed. It is chemically still flour in its hydrated form.
• Pouring water to a beaker is not chemical change because even here no new substance is obtained.
• Decreasing motion of water by freezing is also not a chemical change because just the form of water is changing not the chemical properties.

However, in option D) Oxygen is obtained when Fluorine water is bubbled. A new substance has been obtained over here.

So, D) is the correct answer !

❣️⭐ Hope it helps you dear...⭐⭐❣️❣️