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When Baking Soda is Mixed with Lemon Juice, Bubbles Are Formed with the Evolution of a Gas. What Type of Change is It? Explain. - CBSE Class 7 - Science

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Question

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.

Solution 1

When baking soda (Sodium hydrogen carbonate) is mixed with lemon juice (citric acid), bubbles are formed. The bubbles are formed due to the evolution of carbon dioxide gas. This is a chemical change.

In this change, citric acid contained in lemon juice reacts with sodium hydrogen carbonate which results in the evolution of carbon dioxide gas.

Lemon juice( Citric acid) + Baking soda (Sodium hydrogen carbonate) → Carbon dioxide + Other substances

Solution 2

The reaction between baking soda and lemon juice can be given as below:

Lemon juice + Baking soda ————-> C02 (bubbles) + Other substances

(Citric acid)                                    (Sodium hydrogen carbonate)  (Carbon dioxide)

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APPEARS IN

 NCERT Solution for Science Textbook for Class 7 (2018 to Current)
Chapter 6: Physical and Chemical Changes
Q: 4 | Page no. 66
Solution When Baking Soda is Mixed with Lemon Juice, Bubbles Are Formed with the Evolution of a Gas. What Type of Change is It? Explain. Concept: Concept of Chemical Change.
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