Give two reasons to justify (a) water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature.
Answers
Answer:
Give two reasons to justify a. Water at room temperature is a liquid. b. An iron almirah is a solid at room temperature.
Solution : a. At room temperature (25°C), water is a liquid because it has the following characteristics of liquid:
(i) At room temperature, water has no shape but has a fixed volume i.e., it occupies the shape of the container in which it is kept.
(ii) At room temperature, water flows easily.
Explanation:
Explanation:
a) 1. Liquids do not have a fixed shape. They take the shape of the container in which they are kept. For example. When water is kept in a glass, it takes the shape of glass. Similarly, if water is kept in a cup, it takes the shape of the cup. Thus, water is liquid
2. Liquids have a fixed volume. Take 50 mL of water in a beaker. Transfer it to a cylinder or a glass, it still remains 50 mL. Therefore water is a liquid.
(b) 1. Solids have a fixed shape as well as fixed volume. Since iron almirah has a fixed shape with distinct boundaries and a fixed volume, therefore, iron almirah is a solid.
2. Solids are incompressible. If we apply some force within limits, the volume of the iron almirah cannot be reduced. Therefore, iron almirah is a solid since it is incompressible under moderate pressures.