(i) Boiling point of liquid A— 315 K, B — 345 K.
(ii) In a closed vessel, liquid C will not boil because pressure inside keeps on increasing.
(ii) Temperature corresponding to 60 mm =313 K.
(iv) A liquid boils when vapour pressure becomes equal to atmospheric pressure. At hill station, atmospheric pressure is low. Therefore, liquid boils at a lower temperature and cooking is not perfect. In a pressure cooker, the pressure inside the cooker increases and the liquid boils at a higher temperature.