Correct option is C
Correct Answer: (c) CaCO₃
Calcium carbonate (CaCO₃) is widely used as a mild abrasive in toothpaste. It helps in removing plaque and surface stains from teeth without damaging the enamel. Its fine particle size makes it effective in cleaning while being gentle. Additionally, it provides a source of calcium, which can contribute to the remineralization of tooth enamel.
Information Booster:
● Calcium carbonate is a safe and cost-effective abrasive in toothpaste formulations.
● It is also used as a whitening agent in toothpaste.
● The mild abrasiveness ensures effective cleaning without causing sensitivity.
● Other abrasives commonly used in toothpaste include silica and hydrated alumina.
● CaCO₃ is naturally found in chalk, limestone, and marble.
Additional Knowledge:
- (a) CaO (Calcium oxide): Commonly known as quicklime, used in cement and construction, not suitable for toothpaste.
- (b) Ca(OH)₂ (Calcium hydroxide): Also known as slaked lime, used in industrial processes like water treatment, but not as an abrasive.
- (d) CaCl₂ (Calcium chloride): A salt used as a de-icing agent and in food preservation, not used in toothpaste.
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