Which of the following is the strongest base?A.LiOHB.KOHC.CsOHD.NaOH

To determine which of the given substances is the strongest base, we need to consider the properties of alkali metal hydroxides. The substances in question are:

A. LiOH (Lithium hydroxide)
B. KOH (Potassium hydroxide)
C. CsOH (Cesium hydroxide)
D. NaOH (Sodium hydroxide)

All these substances are strong bases, meaning they dissociate completely in water to give hydroxide ions (OH⁻). However, the strength of a base can be influenced by the solubility and the ionic nature of the hydroxide.

In general, the strength of alkali metal hydroxides increases as we move down the group in the periodic table. This is because the hydroxides of larger alkali metals are more soluble in water and the resulting hydroxide ions are more readily available, making the base stronger.

Here’s a brief comparison of the hydroxides:

LiOH (Lithium hydroxide): Least soluble among the alkali metal hydroxides.
NaOH (Sodium hydroxide): More soluble than LiOH.
KOH (Potassium hydroxide): More soluble than NaOH.
CsOH (Cesium hydroxide): Most soluble among the alkali metal hydroxides.
Because CsOH is the most soluble, it provides the most hydroxide ions in solution, making it the strongest base among the options listed.

Answer: C. CsOH (Cesium hydroxide)