Explain what is observed. An electrolyte, NaCI is added to hydrated ferric hydroxide sol.

Explain what obsserved i.when a beam of light is passed through a colloidal sol. ii.an electrolyte,NaCl is added to hydrated ferri oxide sol. iii.electic current is passed through a colloidal sol.

Explain what is observed. Electric current Is passed through a colloidal sol.

Ferric hydroxide sol can be prepared from freshly perpared ferric hydroxide precipitate. It can also be prepared by adding ferric chloride solution to boilling water. In both cases the sol particles are positively charged. Name the above two methods of preparation of ferric hydroxide sol.

What happens when an electric is applied across two platimum electrodes dipping in ferric hydroxide sol? Explain.

Ferric hydroxide sol can be prepared from freshly prepared ferric hydroxide precipitate. It can also be prepared by adding ferric chloride solution to boiling water. In both cases the sol particles are positively charged. What happenswhen an electric pot ential is applied across two platinum electrodes dipping in" ferric hydroxide sol? Explain.

The electrolytic cell for alumina is given below. AI_2O_3 dissolved in molten cryolite is used as the electrolyte. What is the pu-rpose of adding cryolite to alumina?

On adding few drops of dil, HCl to freshly precipitated ferric hydroxide, a red coloured colloidal solution is obtained. This phenomenon is known as

In an attempt to prepare ferric hydroxide sol by adding small amount of ferric chloride to water, one person got a precipitate of ferric hydroxide. How can you help him to convert Fe(OH)_3 precipitate to Fe(OH)_3 sol?

In the lab three students were asked to prepare a colloidal solution. Student A .: Added starch powder into hot water. Student B : Added a small amount of ferric chlorideInto freshly prepared ferric hydroxide. Student C : Added soap In to water.Which type of colloid was prepared by student A, lyophoblc sol or lyophillcsol ?

In the lab three students were asked to prepare a colloidal solution. Student A .: Added starch powder into hot water. Student B : Added a small amount of ferric chlorideInto freshlyprepared ferric hydroxide. Student C : Added soap In to water.Name the process adopted by student B.