Question : The reaction between an acid and a base is known as _________.

Option 1: condensation reaction

Option 2: substitution reaction

Option 3: oxidation reaction

Option 4: neutralisation reaction

Question : The working of a dry cell is based on

Option 1: Decomposition reaction

Option 2: Spontaneous oxidation-reduction reaction

Option 3: Combination reaction

Option 4: Electrolysis

Question : Sweat contains water and ______.

Option 1: citric acid

Option 2: lactic acid

Option 3: salt

Option 4: vinegar

Question : Brine refers to:

Option 1: Salt water

Option 2: Sweet water

Option 3: Pure water

Option 4: Starch water

Question : The substance most commonly used as a food preservative is

Option 1: sodium carbonate

Option 2: tartaric acid

Option 3: acetic acid

Option 4: sodium salt of benzoic acid