Quartz is___________________?
Correct answer: A. All A., B. and C.
- A. All A., B. and C.
- B. Converted to Tridymite on firing between 870 to 1470°C
- C. Transformed to Cristobalite on heating above 1470°C
- D. Stable form of silica upto 870°C
Explanation
Silica changes progressively from quartz to tridymite between about 870 and 1470°C, and to cristobalite above about 1470°C. Thus all three statements describe its high-temperature transformations.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Plant Design and Economics
803 free Plant Design and Economics MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Plant Design and Economics questions
Test piece for determination of RUL of a refractory is heated in a/an____________________?
Magnesite refractories are used for the construction of those furnaces, which are________________?
Outer combustion chamber of blast furnace stove is lined with _____________ bricks?
Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except ?
With increase in the porosity, thermal spalling resistance of fireclay brick___________________?
Refractoriness/fusion points of 'Superduty' refractories is _______________ °C?