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Match each technique with the property it measures.
List I
A. X-ray diffraction
B. X-ray fluorescence
C. Thermogravimetry
D. Dilatometry
List II
1. Mass change on heating
2. Crystalline phases present
3. Dimensional change on heating
4. Elemental composition

  • A.A-2, B-4, C-3, D-1
  • B.A-3, B-1, C-4, D-2
  • C.A-2, B-4, C-1, D-3
  • D.A-4, B-2, C-1, D-3

Answer: C

Each technique answers one question and is blind to the others, which is why a raw material is characterised by several in combination. Diffraction sees structure, fluorescence sees elements, and the thermal methods follow what happens as the temperature rises.

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