Final answer:
Pure water boils at a temperature of 212*F at 100°C and 1 atm.
Step-by-step explanation:
The boiling point of pure water depends on the pressure. At 1 atm pressure, water boils at exactly 100°C. However, the question asks at which of the given standard conditions does pure water boil at 212°F. Since 212°F is equivalent to 100°C, the correct option is 2) 100°C and 1 atm.