The sweetest chemical is

• a. Fructose
• b. Saccharin
• c. Monellin
• d. Thaumatin

The sweetest chemical among the options provided is Monellin. This natural sweetener, derived from the fruit of the African serendipity berry, is known for its intense sweetness, which is significantly higher than that of sugar.

Comparison of Sweetness

• Fructose: A natural sugar found in fruits, sweeter than sucrose but less sweet than Monellin.
• Saccharin: An artificial sweetener that is much sweeter than sugar but not as sweet as Monellin.
• Thaumatin: A natural sweetener derived from the katemfe fruit, also very sweet but still less than Monellin.

In summary, while all these substances are sweet, Monellin stands out as the sweetest of them all.