Question

The size of colloidal particles ranges between:

• A. ${10}^{-7}-{10}^{-9}$ cm
• B. ${10}^{-9}-{10}^{-11}$ cm
• C. ${10}^{-5}-{10}^{-7}$ cm
• D. ${10}^{-2}-{10}^{-3}$ cm

Answer 1

Answer: (C)

${10}^{-5}-{10}^{-7}$ cm

• A colloid is a mixture in which one of the substances is split into very minute particles which are dispersed throughout a second substance. The substance which is dispersed is called a dispersed phase whereas the one in which the first substance is distributed is called a dispersion medium.
  
• The size of colloid particles generally ranges between 1 to 1000 nanometres i.e. ${10}^{-5}$ to ${10}^{-7}cm$.
  10−5 - 10−7 cm