Materials and Construction
Chromel (Nichrome) is an alloy of
chromium and molybdenum.
nickel and chromium.
molybdenum and nickel.
chromium and aluminium.
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Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
Phosphoric acid is produced in wet process from phosphate rock and
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be