JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 14
question_answer
Different forms of silica such as quartz, tridymite and cristobalite are as follows: \[\underset{(Si{{O}_{2}})}{\mathop{Quartz}}\,\xrightarrow{870{}^\circ C}\underset{(Si{{O}_{2}})}{\mathop{Tridymite}}\,\underset{(Si{{O}_{2}})}{\mathop{Cristobalite}}\,\]The structure possessed in them is