Question 11 Mark
Red brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
Answer
View full question & answer→False.
4 questions · timed · auto-graded
Explanation:
Food is cooked more quickly in a pressure cooker because at the higher pressure (1 bar/ 15 psi), the boiling point of water rises from 100°C (212°F) to 121°C (250°F).
Explanation:
Pure water boils at 100 degrees Celsius under normal atmospheric pressure, but the Dead Sea surface is so low (more than 400 meters below "sea level") that water boils at about 101 degrees there. It does boil at a higher temperature because of the high amounts of non-volatile solids.