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प्रश्न
Why do we store silver chloride in a dark coloured bottle?
Give reason:
Silver chloride is stored in dark coloured bottles.
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उत्तर
Silver chloride is a white solid. However, it is very sensitive to sunlight and decomposes in the presence of light to form silver (grey in colour) and chlorine.
\[\ce{2AgCl_{(s)} ->[Sunlight] \underset{Grey}{2Ag_{(s)}} + Cl2_{g)}}\]
In order to avoid action by sunlight, it is kept in a coloured bottle.
संबंधित प्रश्न
Define ‘redox reaction’. Give one example.
Why is photosynthesis considered an endothermic reaction?
Give an example of an oxidation reaction.
When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name
- substance oxidised, and
- substance reduced.
Define the following in terms of gain or loss of hydrogen with one example:
Oxidation
You are given the following chemical equation:
\[\ce{Mg_{(s)} + CuO_{(s)} -> MgO_{(s)} + Cu_{(s)}}\]
This equation represents:
Hydrogen burns with a ______ flame and ______ sound is heard.
Fill in the blank
Oxidation is the removal of ......................and addition of ....................
MULTIPLE CHOICE QUESTIONS
The process of adding oxygen to a substance is called
- oxidation.
- reduction.
- displacement.
- hydrogenation.
State whether the following conversion is oxidation or reduction:
PbO2 + SO2→ PbSO4
A metal oxide that is reduced by hydrogen is
For the reaction PbO + H2→ Pb + H2O, which of the following statements is wrong?
State what is reducing agent. Give an example of oxidising agent in the gaseous, liquid, and solid form.
When the positive charge on an ion increases or the negative charge on them decreases it is called as _______.
In the reaction of iron with copper sulphate solution:
CuSO4 + Fe → Cu + FeSO4
Which option in the given table correctly represents the substance oxidized and the reducing agent?
| OPTION | Substance Oxidized | Reducing Agent |
| A | Fe | Fe |
| B | Fe | FeSO4 |
| C | Cu | Fe |
| D | CuSO4 | Fe |
Identify the oxidising agent (oxidant) in the following reactions
`"Pb"_3"O"_4 + 8"HCl" -> 3"PbCl"_2 + "Cl"_2 + 4"H"_2"O"`
Identify the oxidising agent (oxidant) in the following reactions
`3"Fe" + 4"H"_2"O" -> "Fe"_3"O"_4 + 4"H"_2`
Which among the following are physical or chemical change?
Burning of Liquefied Petroleum Gas (LPG)
The tendency of atoms to have eight electrons in the outer shell is known as ______.
State whether the given chemical reaction is a redox reaction or not. Justify your answer.
\[\ce{MnO_2 + 4HCl->MnCl_2 +2H_2O + Cl_2}\]
