What happens when an acid or base is mixed with water?

Differentiate between the following pair based on the information given in the bracket.

• Acid and Alkali (formation of the type of ions)

Four solutions A, B, C, and D have pH 2, 6. 7, and 13 respectively:

Which solution will have the highest number of hydronium ions?

Give the appropriate term defined by the statement given below:

The substance that releases hydronium ion as the only positive ion when dissolved in water

What is an alkali? Do basic solutions also have ${\mathrm{H}}^{+}$(aq) ions? If yes, then why are these basic? 

Which of the following is a strong acid?

The bulb is not glowing in this experimental setup. Because: