The correct option is (a) Acid + base = salt + water .
Sweden's Svante Arrhenius proposed the concept of acids and bases in 1884 based on the theory of ionization.
According to Arrhenius, acids are hydrogen-containing compounds that release H + ions or protons when dissociated in water, and bases are hydroxide compounds that release OH-ions when dissociated in water.
Acid + base = salt + water
Neutralisation is a reaction between an acid and an alkali that forms a salt and water.
Salts are odourless and have a salty taste, and many are soluble in water.
Common examples include sodium chloride, potassium iodide, calcium carbonate and copper sulfate.
The pH scale is used to measure acidity and alkalinity.
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