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प्रश्न
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
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उत्तर
\[\ce{\underset{\text{quick lime}}{CaO} + H2O ->\underset{\text{slaked lime}}{Ca(OH)2}}\]
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संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
How do the following help in bringing about a chemical change?
light.
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Zn + `"H"_2"SO"_4` `→`
(dil)
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Copper carbonate when heated, it turns :
Balance the following equation :
Fe + H2O → Fe3O4 + H2
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
The water we drink is a combination of hydrogen and oxygen.
Give an example of a chemical reaction for the following situation:
A change in colour is observed
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
When magnesium is burnt in the air, a new substance is formed which is ______.
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.
What is thermochemical reactions?
