Question

4. Arrange the following substances in increasing order of forces
of attraction between the particles-water, sugar, oxygen.
5. What is the physical state of water at-
(a) 25°C
(b) 0°C
(c) 100°C ?
Give tu rencong to justifin
6​

Answer 1

Answer:

4. Oxygen < Water < Sugar.

5. (a) liquid state.

(b) Solid state, can also be in liquid state (condition required).

(c) Gaseous state, can also be in liquid state (condition required).

Explanation:

Do yo read in class IX? I read in class IX.

Answer 2

Answer:

4. The least force of attraction is in oxygen then in water and then sugar

so, oxygen, water, sugar

this is the correct sequence

5. (a) 25 º C

• Water at 25°C is present in the liquid state.

• The water which we use for our day-to-day activities is in a liquid state.

• The water we use for drinking, cooking, washing, etc., all are in a liquid state.

(b) 0ºC

• At 0°C,  water exists in solid-state.

• We know that the freezing point of water is 0 °C.

• The liquid form of water starts to become solid (ice) at this temperature.

Example: If you keep an ice cube tray filled with water and freeze it for a few hours, you may observe the cubes where you poured water have become solid. Ice is the solid state of water.

(c) 100ºC

• At 100°C, water exists in a gaseous state.

• We know that the boiling point of water is 100°C.

• The water starts to evaporate after attaining this high temperature.

Example: When you boil water in your home, you observe the vapours coming out of the vessel after some time. These vapours are the gaseous state of water.