Question

The charges on the colloidal CdS sol and TiO₂ sol are respectively:

विकल्प

• positive and positive

• positive and negative

• negative and negative

• negative and positive

Answer 1

Negative and positive

Explanation:

Metal sulfide sols like CdS are negatively charged sols, whereas TiO₂ sol belongs to the class of positively charged sols such as metallic hydroxide sols (Fe(OH)₃, Al(OH)₃, TiO₂, etc.) due to preferential adsorption of ions imparting positive charge.