Which substance is present in the poison of a honeybee?

In a basic aqueous solution,if the concentration of $[OH^-]$ decreases,what happens to the $pH$?

$(a)$ $A$ solution of a substance $'X'$ is used for testing carbon dioxide. Write the equation of the reaction of $'X'$ with carbon dioxide.
$(b)$ How is $'X'$ obtained? Write the chemical equation.

How is the $pH$ of a solution of an acid influenced when it is diluted?

In a basic aqueous solution,if the concentration of $[OH^-]$ decreases,what happens to the $pOH$?

Write the chemical name and formula of the following:
$(a)$ Salt formed by the combination of a weak acid like carbonic acid and a strong base like sodium hydroxide.
$(b)$ Basic substance formed by the chlor-alkali process.
$(c)$ Substance added to cakes to make them fluffy.