Normal temperature and pressure (N.T.P.) corresponds to ___________________?
Correct answer: C. 20°C and 760 mm Hg
- A. 0°C and 760 mm Hg
- B. 15°C and 760 mm Hg
- C. 20°C and 760 mm Hg
- D. 0°C and 1 kgf/cm2
Explanation
In the usual chemical-engineering convention, NTP is 20°C and 1 atm, with 1 atm equal to 760 mm Hg. The 0°C reference is generally called STP, so option a is the common trap.
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