The statement below is followed by four options. Each option is related to the item in the statement, but only one is always true. Select the option that always holds and makes the statement true.
"A solution always has ______."
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A solvent
The answer must hold for every solution, without exception. An option that is present in most cases but can be missing in even one case is not always true.
Option (1) A solvent — a solution is a mixture of a solute dissolved in a solvent; the solvent is the part that does the dissolving, so every solution has one and this is always true.
Option (2) Water — tincture of iodine is iodine dissolved in alcohol, and an alloy is a solid solution; neither has water.
Option (3) A colour — sugar or salt dissolved in water gives a colourless solution.
Option (4) Salt dissolved in it — the solute can be sugar, iodine, a gas such as carbon dioxide in soda water, and so on.