Question

1. which chemical is commonly used in toothpaste to prevent tooth decay?

a) sodium chloride
b) calcium carbonate
c) fluoride compounds
d) magnesium hydroxide

1. aspirin, a commonly used painkiller, is chemically known as:

a) acetylsalicylic acid
b) paracetamol
c) ibuprofen
d) phenacetin

Explanation:

Question 1

Sodium chloride (a) is table salt, not for tooth decay prevention. Calcium carbonate (b) is a filler in toothpaste. Magnesium hydroxide (d) has other uses. Fluoride compounds (c) strengthen enamel and prevent decay.

Paracetamol (b), Ibuprofen (c), and Phenacetin (d) are different painkillers. Aspirin is chemically Acetylsalicylic acid (a).

Answer:

c) Fluoride compounds

Question 2