Advertisements
Advertisements
प्रश्न
Bubbles are seen in the test tube during the preparation of lime water.
Advertisements
उत्तर
Lime water is a saturated solution of calcium hydroxide (Ca(OH)2). It is commonly prepared by passing carbon dioxide gas through a solution containing quicklime (CaO) or slaked lime (Ca(OH)₂) in water.
- Formation of Lime Water: \[\ce{CaO + H2O -> Ca(OH)2}\]
Quicklime reacts with water to form slaked lime (calcium hydroxide), which dissolves slightly in water to form lime water. - Bubbling of CO₂ (Observation of Bubbles): \[\ce{Ca(OH)2 + CO2 -> CaCO3 ↓ + H2O}\]
-
When CO₂ gas is passed through the lime water, it reacts with the calcium hydroxide.
- The bubbles observed are CO₂ gas bubbles.
- The reaction produces calcium carbonate, which causes the solution to turn milky.
-
APPEARS IN
संबंधित प्रश्न
Write the name and chemical formula of the simplest organic acid.
What is the common name of methanoic acid.
Write the formulae of methanoic acid.
Write the formulae of ethanoic acid.
If you are asked to report your observations about the following two properties of acetic acid, what would you report?
(i) Odour
(ii) Effect on litmus
Which one of the following are the correct observations about acetic acid?
(A) It turns blue litmus red and smells like vinegar
(B) It turns blue litmus red and smells like burning sulphur
(C) It turns res litmus blue and smells like vinegar
(D) It turns red litmus blue and has a fruity smell
Write three physical properties of acetic acid.
What is the main constituent of vinegar?
Draw the structural formula of a compound with two carbon atoms in the following case:
An alcohol containing two carbon atoms.
State how the following conversions can be carried out:
Ethyl alcohol to Ethane
Identify the term or substance based on the descriptions given below:
Hydrocarbon containing a triple bond used for welding purposes
Write the molecular formula of the given compound.
Ethanoic acid
Explain the following reaction with an example.
Esterification
Write the characteristics of ethanoic acid.
A few drops of ethanoic acid were added to solid sodium carbonate. The observation made was that ______.
When ethanoic acid is treated with NaHCO^ the gas evolved is ______.
Write the chemical equation for the following:
Saponification Reaction
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.
Write a chemical equation for the reaction.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
