(a) The freezing point of water is 00C and the boiling point of water is 1000C. At room temperature the particles of water do not have enough energy to break free from the inter-molecular force of attraction of each . Hence, water remains as a liquid at room temperature.
(b) An iron almirah is solid at room temperature because melting point of iron i.e the temperature required to convert solid iron to liquid iron is much higher than the room temperature
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