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प्रश्न
What do you observe? When
Water is added to the quick lime.
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उत्तर
Quick lime reacts vigorously with water to produce slaked lime, i.e. calcium hydroxide.
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संबंधित प्रश्न
State four conditions necessary for a chemical reaction to take place.
Explain the following reaction with one suitable example of Displacement reaction.
Give reason for the following:
Silver nitrate solution is kept in coloured bottles.
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of dilute acid to an active metal.
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Ammonium dichromate.
True or False. If false, give the correct answer.
Taking a glass of water and freezing it by placing it in the freezer is a chemical change.
______ is the chemical name of slaked lime.
