ECONOMICS
SCARCITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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water
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minerals
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toothpaste
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crude oil
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Detailed explanation-1: -Detailed Solution. The correct answer is Galena. Galena is NOT used to make toothpaste.
Detailed explanation-2: -Sodium carbonate is not an ingredient in toothpaste.
Detailed explanation-3: -Toothpastes generally contain the following components: Water (20–40%) Abrasives (50%) including aluminum hydroxide, calcium hydrogen phosphates, calcium carbonate, silica and hydroxyapatite. Fluoride (usually 1450 ppm) mainly in the form of sodium fluoride.
Detailed explanation-4: -The important ingredients of a toothpaste are abrasives, water and fluoride. Abrasives such as calcium carbonate and calcium hydrogen phosphates help to remove the dirt on teeth and also helps to polish them. Fluoride is the most common active ingredients used to prevent decay of our teeth.