Question

The name aquadag is given to the colloidal solution of:
a. Copper in water
b. Platinum in water
c. Gold in water
d. Graphite in water

Answer 1

Hint: Colloidal solution is that solution in which particles of one substance are evenly suspended in particles of another substance. If a mixture is classified as colloid, then it's suspended particles must not settle at the bottom of the container if left undisturbed.

Complete step by step answer:
Aquadag is primarily the colloidal solution of graphite is water. It is used as a coating over the interior of a cathode ray tube (CRT) to collect the secondary electrons. It helps prevent the overheating of CRT and also keep it in the state of electrical equilibrium. It is the abbreviated name for Aqueous Deflocculated Acheson Graphite and it can also be used as a lubricant or an electrically conductive coating. Since, Aquadag is a water-based colloidal graphite, it is also named as Carbon Colloid.
Hence, the answer to the above question is option (d).

Note:
Aquadag being a colloidal solution finds its applications in the place where low grade dispersions of graphite powder is unsuitable. The Typical applications are:
i)Preparing electrically conductive coatings
ii)Imparting some properties such as good electrical and heat conductivity to various porous materials such as asbestos, paper or wood.
Colloidal solution is heterogeneous in nature and also the substance that is dissolved is known as dispersed phase and the medium is known as dispersion medium. Whereas true solution is homogeneous in nature and also the substance dissolved is known as solute and the medium is known as solvent.