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Question -

Give two reasons to justify –
(a) Water at room temperature is a liquid.
(b) An iron almirah is a solid at room temperature.



Answer -

(a) Transition in the states of matter of water occurs at 0°C and 100°C. At room temperature, water
is in the liquid state, thereby exhibiting all the properties of a liquid such as
  1. Water flows at this temperature
  2. It has a fixed volume and it takes the shape of its container
(b) The melting and boiling points of iron are as high as 1538°C and 2862°C respectively. The room
temperature is about 20-25 °C. Hence iron almirah is a solid at room temperature.

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