Question

To chemically free a diamond encased in silicate rock without harming it, one would likely use:

a. Strong acids
b. Oxidizing agents
c. High temperatures
d. Alkali metals

Answer 1

A mild solution of hydrofluoric acid is used to dissolve silicate rock encasing a diamond, as it does not harm the tough, high melting point diamond.

Step-by-step explanation:

To chemically free a diamond encased in silicate rock without harming it, one would likely use a mild solution of hydrofluoric acid. This is because hydrofluoric acid can dissolve silicates, which are the primary component of silicate rock, and would not harm the diamond in the process.

Diamonds are known for their exceptional hardness and high melting points, and thus are not affected by hydrofluoric acid. It is important to note that diamonds vaporize at temperatures above 3500°C, so using high temperatures for this process is not suitable.

Similarly, oxidizing agents, alkali metals, and strong acids may also not be appropriate for freeing the diamond, as these can potentially cause reactions that might harm the diamond or are ineffective against silicate materials.