Question

$NaOH$ forms hydrated salts.
(A) True
(B) False

Answer 1

Hint: Sodium hydroxide is an alkali salt and the commercial name is caustic soda, the name is given due to the corrosive nature of animals and plants. There are wide ranges of industrial applications of sodium hydroxide and its chemical formula is NaOH. In the refining of petroleum, vegetable oils and the purification of bauxite for the extraction of aluminium are the industrial applications of NaOH.

Complete step by step solution:
A crystalline salt molecule that is loosely attached to a certain number of water molecules is called hydrated salts. A molecule that is not bounded to water molecules is an anhydrate and a molecule that is bonded to water molecules is a hydrated salt. The water molecules in the hydrated salt are incorporated into the crystalline structure of the salt.
For example, magnesium sulfate heptahydrate chemical compound represented as $MgS{{O}_{4}}.7{{H}_{2}}O$
This formula represents 7 water molecules bonded to magnesium sulfate molecules.
The simplest ratio for hydrated cadmium sulfate is three molecules of cadmium sulfate bounded to 8 water molecules and the chemical formula is ${{(CdS{{O}_{4}})}_{3}}.8{{H}_{2}}O$
$NaOH$ is a deliquescent solid, which means it absorbs moisture from the air and turns to the liquid state.
When sodium hydroxide dissolves in water, it absorbs water and forms a solution. Instead of being bound to water molecules, sodium hydroxide dissolves in water. So, NaOH does not form hydrated salts.

Hence, given that NaOH form hydrated salt is a false statement. Option (B) is correct.

Note: The heavier group 1 elements that have bigger cations like potassium, rubidium, and caesium do not form hydrated salts except sodium metal and lithium due to their less size of an atom. The extent of hydration is controlled by the size of the ion and its metal charge. Effect of charge on the extent of hydration more for barium and potassium due to similar ionic radii.