Question

Crucibles are made of a mixture of quartz and silica since the linear coefficient of expansion is almost:

• A. Zero for the mixture.
• B. Infinity for that mixture.
• C. Negative for that mixture.
• D. Positive for that mixture.

Answer 1

The correct option is A Zero for the mixture.

Crucibles are made of a mixture of quartz and silica since the linear coefficient of expansion is zero for that mixture. Hence they do not expand when heated.