Advertisements
Advertisements
प्रश्न
Explain by writing a word equation.
Bubbles are seen on adding lemon juice to baking soda.
Advertisements
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
Define catalyst.
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Explain by writing a word equation.
Respiration is a chemical change.
What do you observe? When
Water is added to the quick lime.
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Give reason for the following:
Electrolytic decomposition of water is a reaction involving change of state.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
What is thermochemical reactions?
