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प्रश्न
Explain by writing a word equation.
Bubbles are seen on adding lemon juice to baking soda.
उत्तर
Bubbles are seen on adding lemon juice to baking soda because lemon juice is citric acid and baking soda is sodium bicarbonate. On adding lemon juice in baking soda, we add acid in the base then neutralization reaction is taking place resulting in the formation of salt, water and brisk effervescence of carbon-dioxide. This CO2 is released in the form of bubbles.
H2C6H5O7(aq) + 3NaHCO3(aq) → Na3C6H5O7(aq) + 3H2O(l) + 3CO2(g)
citric acid + baking soda → salt + water + carbon dioxide
Bubbles are seen on adding lemon juice to baking soda.
संबंधित प्रश्न
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
Write the chemical reaction where the following changes are observed.
Gas is evolved
Write the chemical reaction where the following changes are observed.
Physical state is changed
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
Complete the following table and write your observations.
|
Hydrogen sulphide |
Ammonia |
Sulphur dioxide |
Hydrogen chloride |
|
|
Shake the gas with red litmus solution |
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Shake the gas with blue litmus solution |
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|
Apply a burning splint to a gas |
Give a word equation for the following reaction.
Two solids which combine on heating, to give a liquid.
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
What is the role of a catalyst in a chemical reaction?
Write a note on the following:
Fermentation
