Answer:
b) Baking soda
Explanation:
Baking soda is sodium hydrogen carbonate, NaHCO₃.
It reacts with water according to the equation
NaHCO₃ + H₂O ⇌ H₂CO₃ + NaOH
Thus, baking soda is a base because it increases the concentration of hydroxide ions in water.
Water is neutral.
Lemon juice is an acid because it contains citric acid.
An insulator is a substance that does not conduct electricity. Insulators are neither acidic nor basic.
