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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
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
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.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
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Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
______ is a natural indicator.
When carbon dioxide is passed through lime water ______.
The reaction of H2 gas with oxygen gas to form water is an example of ______.
