Question Bank - General Science

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Mixing of baking soda with lemon juice leads to formation of bubbles along with evolution of a gas X.The gas X is :-

A.
Oxygen
B.
Methane
C.
Carbon dioxide
D.
Hydrogen

Solution:

The correct answer is Carbon dioxide.Concept:A change in which one or more new substances are formed is called a chemical change.A chemical change is also called a chemical reaction.Explanation:When baking soda is mixed with lemon juice the bubbles are formed.The bubbles are formed with the evolution of Carbon dioxide gas.This is a chemical change.The citric acid in lemon juice reacts with the baking soda (or sodium bicarbonate) results in the evolution of carbon dioxide gas.Lemon Juice (citric acid) + Baking soda (sodium bicarbonate) ? Carbon dioxide + Other substances

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