27. When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout water. What does this observation tell us about the nature of potassium permanganate and water?
28. When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine
vapour diffuse into air. Explain how bromine vapour diffuse into air.
29. Describe in your own words, what happens to the particles when salt dissolves in water.

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as in case 1 and Case 2. Diffusion takes place more quickly in liquids because the particles are able to move over each other. Diffusion takes place very quickly in gases because the gas particles move very quickly and have wide spaces between them, so the particles of body spray can spread out quic

they are also strong oxidising agent

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hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?