Answer
418.2k+ views
Hint:Potassium dichromate is a strong oxidising agent. It is used to convert alcohols into aldehydes and carboxylic acids.
-Anions are electron rich species and have net negative charge.
Complete step by step answer:
Potassium dichromate ${{K}_{2}}C{{r}_{2}}{{O}_{7}}$ is defined as an inorganic compound which acts as a strong oxidising agent. It is very harmful for health causing redness and pain. It is a red orange colour compound and it is present in ionic crystalline form. The salt is deliquescent.
Sulphur dioxide is a toxic gas and releases pungent smell. It is soluble in water. It is produced in air due to the burning of coal and as a by-product during the extraction of copper.
The sulfite ion is a weak base and in acidic solution, it converts into sulfurous acid that releases sulphur dioxide gas.
When a sodium dioxide reacts with potassium dichromate it will give chromium sulphate, water and potassium sulphate as a by-product .
Then,
$S{{O}_{2}}+{{K}_{2}}C{{r}_{2}}{{O}_{7}}\to C{{r}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}+{{K}_{2}}S{{O}_{4}}+{{H}_{2}}O$
The sulphur dioxide changes the potassium dichromate paper green and reduces $C{{r}_{2}}{{O}_{7}}^{2}$ to $C{{r}^{3+}}$
Therefore, the correct option is B that is sulphite .
Additional information
Potassium dichromate is highly corrosive and is a strong oxidising agent in acidic medium. Potassium dichromate is a potassium salt . It is the dipotassium salt of dichromic acid. It is used for the oxidation of primary alcohols and secondary alcohols.
Note:
The orange solution of acidified potassium dichromate turns green when sulphur dioxide is passed to the potassium dichromate. In acidic medium sulphite ion is converted into sulfurous acid that releases sulphur dioxide gas. Here, the sulfite ion acts as a reducing agent.
-Anions are electron rich species and have net negative charge.
Complete step by step answer:
Potassium dichromate ${{K}_{2}}C{{r}_{2}}{{O}_{7}}$ is defined as an inorganic compound which acts as a strong oxidising agent. It is very harmful for health causing redness and pain. It is a red orange colour compound and it is present in ionic crystalline form. The salt is deliquescent.
Sulphur dioxide is a toxic gas and releases pungent smell. It is soluble in water. It is produced in air due to the burning of coal and as a by-product during the extraction of copper.
The sulfite ion is a weak base and in acidic solution, it converts into sulfurous acid that releases sulphur dioxide gas.
When a sodium dioxide reacts with potassium dichromate it will give chromium sulphate, water and potassium sulphate as a by-product .
Then,
$S{{O}_{2}}+{{K}_{2}}C{{r}_{2}}{{O}_{7}}\to C{{r}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}+{{K}_{2}}S{{O}_{4}}+{{H}_{2}}O$
The sulphur dioxide changes the potassium dichromate paper green and reduces $C{{r}_{2}}{{O}_{7}}^{2}$ to $C{{r}^{3+}}$
Therefore, the correct option is B that is sulphite .
Additional information
Potassium dichromate is highly corrosive and is a strong oxidising agent in acidic medium. Potassium dichromate is a potassium salt . It is the dipotassium salt of dichromic acid. It is used for the oxidation of primary alcohols and secondary alcohols.
Note:
The orange solution of acidified potassium dichromate turns green when sulphur dioxide is passed to the potassium dichromate. In acidic medium sulphite ion is converted into sulfurous acid that releases sulphur dioxide gas. Here, the sulfite ion acts as a reducing agent.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)