For the preparation of polycrystalline solids (i.e. powder), a mixture – McqOptions

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1.	For the preparation of polycrystalline solids (i.e. powder), a mixture of solid starting materials directly react with each other in the solid state. What is the range of the temperature usually required for the solids to react together in Celsius?
A.	25 to 37
B.	1000 to 1500
C.	-25 to 0
D.	2000 to 3000
Answer» C. -25 to 0

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