If $1$ mole of glucose is dissolved in $500 \; mL$ of glucose solution,what is the molarity of the solution (in $; M$)?

The metal salt $A$ is blue in colour. When salt $A$ is heated strongly over a burner,a substance $B$ present in it is eliminated and a white powder $C$ is left behind. When a few drops of a liquid $D$ are added to powder $C$,it becomes blue again.
$(a)$ Identify $A, B, C, D$.
$(b)$ Write the chemical equations involved.
$(c)$ Give an example of a salt which also shows the above property.

Which substance is present in the poison of a honeybee?

One of the constituents of baking powder is sodium hydrogencarbonate, the other constituent is

Which of the following gives the correct increasing order of acidic strength?

At what $pH$ is rain water said to be acidic?