Question

List any three properties on the basis of which a colloidal solution can be recognised

Answer 1

Properties of Colloidal Solution





Properties of Colloidal Solutions

All the properties of colloidal solutions can be grouped under three heads:

1. General Properties: General properties of colloidal solutions are given in difference between colloid and true solution.

Optical Properties:

(i)  Brownian movement: Robert Brown (1927) an English Botanist, observed that the pollen grains in aqueous suspensions were in constant motion. Similar phenomenon was, later on, found in case of colloidal solution, when observed ultra-microscopically.
. Electrical Properties:

(i)   Electrophoresis (or Cataphoresis): Since the colloidal particles are electrically charged (+ or -)with respect to the dispersion medium, hence on passing electric current through colloidal solution the charged particles move towards oppositely charged electrodes and get discharged to give precipitate. So, this migration of colloidal particles under the influence of electric field is called electrophoresis

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Answer 2

ⓗⓔⓡⓔ ⓘⓢ ⓨⓞⓤⓡ ⓐⓝⓢⓦⓔⓡ

✰ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴘᴀʀᴛɪᴄʟᴇs ᴏғ ᴀ ᴄᴏʟʟᴏɪᴅ ɪs ᴛᴏᴏ sᴍᴀʟʟ ᴛᴏ ʙᴇ ɪɴᴅɪᴠɪᴅᴜᴀʟʟʏ sᴇᴇɴ ʙʏ ɴᴀᴋᴇᴅ ᴇʏᴇs.

✰ ᴛʜᴇʏ ᴅᴏ ɴᴏᴛ sᴇᴛᴛʟᴇ ᴅᴏᴡɴ.

✰ ɪᴛ sᴄᴀᴛᴛᴇʀ ʙᴇᴀᴍ ᴏғ ʟɪɢʜᴛ.

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