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प्रश्न
What do you understand by precipitation reaction? Explain with examples.
What do you understand by the term precipitation?
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उत्तर
Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate. A precipitate is a solid that forms out of solution.
A common example is that of the mixing of two clear solutions: Silver nitrate (AgNO3) and sodium chloride (NaCl)
\[\ce{AgNO3(aq) + NaCl(aq) -> AgCl(s) ↓ + NaNO3(aq)}\]
The precipitate forms because the solid (AgCl) is insoluble in water.
संबंधित प्रश्न
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
What do you observe? When
Sodium chloride solution is added to silver nitrate solution.
Name: Two nitrates that do not produce nitrogen dioxide on heating.
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Copper nitrate.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Write the equation for the process of formation of rust.
Give an example where heat, light, and sound are produced during a chemical change.
Chemical changes are important in our day-to-day life. Give examples.
