Question

A strong chemical substance that is used as on objects and surfaces in our surroundings to kill germs.

• A. cresol
• B. carbolic acid
• C. Iodine
• D. Mercurochrome

Answer 1

The correct option is A

cresol

The correct option is A.

Explanation of the correct option:

1. A chemical substance that is used to inhibit the growth and development of microorganisms is called as antiseptic or disinfectants.
2. Disinfectants destroy microorganisms which grow on inanimate/ nonliving surfaces and objects whereas antiseptics destroy microorganisms on living tissue/ body.
3. Cresol is an example of disinfectant.

Explanation of the incorrect options:

Option B

Carbolic acid is a very poisonous chemical substance made from tar and also found in some plants and essential oils.

Option C

Iodine is the non-irritating, non-stinging formula is safe for use on horses, cattle, dogs and cats, and is non-staining to skin, hair and natural fabrics.

Option D

Mercurochrome is an antiseptic used to prevent infection in small cuts and abrasions.

Final answer: A strong chemical substance that is used as on objects and surfaces in our surroundings to kill germs is cresol.