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प्रश्न
Explain by writing a word equation.
Bubbles are seen on adding lemon juice to baking soda.
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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
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
FILL IN THE BLANK
The new substances formed during a chemical reaction are called the ..................
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Write true or false :
No new substance is formed during a chemical reaction.
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Chemists identify gypsum as a natural indicator.
Which is used as a catalyst during the process of hydrogenation of oils?
Photosynthesis is a chemical charge. Justify your answer.
