Temperature measuring instruments are standardised mostly with _____________ points of pure substances?
Correct answer: C. Both A. & B.
- A. Melting
- B. Boiling
- C. Both A. & B.
- D. Neither A. nor B.
Explanation
Temperature instruments are commonly calibrated against reproducible fixed points such as the melting or freezing point and the boiling point of pure substances. Using both types of points provides calibration references over different temperature ranges.
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