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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
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On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.
FILL IN THE BLANK
In a ............ change, new substances are formed.
What are chemical reactions?
Write true or false .
A black residue is formed when sugar is heated .
| Reactants | Products | Type of chemical reaction |
| BaCl2(aq) + ZnSO4(aq) | H2CO3(aq) | Displacement |
| 2AgCl(s) | FeSO4(aq) + Cu(s) | Combination |
| CuSO4(aq) + Fe(s) | BaSO4↓ + ZnCl2(aq) | Decomposition |
| H2O(l) + CO2(g) | 2Ag(s) + Cl2(g) | Double displacement |
Define a photochemical reaction.
Write the chemical reaction where the following changes are observed.
Colour change is noticed
What do you observe? When
Barium chloride is added to sodium sulphate solution
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
Which of the following is not an “element + element → compound” type reaction?
The percentage composition of Nitrogen in Ureas is ______.
Photosynthesis is a chemical charge. Justify your answer.
When carbon dioxide is passed through lime water ______.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
