Home » mcq » chemistry » Concentration of a material which is lethal to 50% animal is called A. LD50 B. LC50 C. NOAEL D. ADI
LD50
LC50
NOAEL
ADI
Answer is Wrong!
Answer is Right!
The correct answer is A. LD50.
LD50 stands for “lethal dose, 50%”. It is a measure of the toxicity of
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a substance. It is the dose of a substance that is lethal to 50% of a population of test animals. LD50 is usually expressed in milligrams of substance per kilogram of body weight.
LC50 stands for “lethal concentration, 50%”. It is similar to LD50, but it is the concentration of a substance in the air or water that is lethal to 50% of a population of test animals. LC50 is usually expressed in parts per million (ppm) or milligrams per liter (mg/L).
NOAEL stands for “no observed adverse effect level”. It is the highest dose of a substance that does not cause any adverse effects in a population of test animals. NOAEL is usually expressed in milligrams of substance per kilogram of body weight.
ADI stands for “acceptable daily intake”. It is the daily intake of a substance that is considered to be safe for humans. ADI is usually expressed in milligrams of substance per kilogram of body weight.
In conclusion, the concentration of a material which is lethal to 50% animal is called LD50.