Which one dissolve in water quikly sugar, salt, methane and carbon di oxide?

Among the options provided, both sugar (sucrose) and salt dissolve quickly in water, but they do so for different reasons and with different characteristics.

Sugar (Sucrose)

Sucrose is highly soluble in water due to its polar nature. The molecule has many O-H bonds, creating positive and negative regions that allow it to interact with the polar water molecules through hydrogen bonding and electrostatic attractions. This makes sucrose dissolve readily in water, with its solubility increasing significantly as the temperature of the water increases25.

Salt

Salt (sodium chloride) is also highly soluble in water. It dissolves by dissociating into its constituent ions (sodium and chloride ions), which are then hydrated by water molecules. This ionic dissociation allows salt to dissolve quickly in water.

Methane

Methane is a gas and has very low solubility in water. Unlike sugar and salt, methane does not form significant interactions with water molecules, making it dissolve very slowly and in very small amounts in water14.

Carbon Dioxide

Carbon dioxide is soluble in water, but it does not dissolve as quickly or as readily as sugar or salt. When COâ‚‚ dissolves in water, it forms carbonic acid, but the majority of the COâ‚‚ remains as dissolved COâ‚‚ molecules rather than converting to carbonic acid. The solubility of COâ‚‚ in water decreases with increasing temperature, which is opposite to the behavior of sugar134.

In summary, sugar (sucrose) and salt dissolve quickly in water due to their strong interactions with water molecules, while methane and carbon dioxide dissolve much more slowly and to a lesser extent.