Question

Which substance is the least toxic?

a. chlorine (LD50 = 850 mg/kg)
b. vitamin A (LD50 = 2000 mg/kg)
c. cola (LD50 = 140 mg/kg)
d. aspirin (LD50 = 200 mg/kg)

Answer 1

Vitamin A, with an LD50 of 2000 mg/kg, is the least toxic substance among the ones listed, as it requires a higher dose to be lethal compared to chlorine, cola, and aspirin.

Step-by-step explanation:

The safety of a substance can be measured by its LD50 value, which represents the dose required to kill 50% of a test population, usually laboratory animals like rats. When comparing the substances given:

Chlorine (LD50 = 850 mg/kg)

Vitamin A (LD50 = 2000 mg/kg)

Cola (LD50 = 140 mg/kg)

Aspirin (LD50 = 200 mg/kg)

The substance with the highest LD50 value is considered the least toxic as it requires a larger amount to be lethal. In this case, vitamin A, with an LD50 of 2000 mg/kg, is the least toxic substance among the options provided, as it requires a significantly higher dose to be lethal compared to the others.

Answer 2

I believe it's D. I searched up a lethal table chart and it states Aspirin is even more toxic than chlorine. As for the other two, it didn't specifically state it was toxic with one dose - meaning you have to take more than one dose for toxicity to take effect.

Step-by-step explanation: