Question

A strong chemical substance which is used on objects and surfaces in our surroundings to kill germs
A) Cresol
B) Carbolic acid B
C) Clonidine
D) Mercurochrome

Answer 1

Sterilization is the process commonly seen in various sectors, to prevent and kill the germs on certain objects as well as surroundings and this can be of many types, where it can be done by heat, chemicals, etc. So many types of chemical agents are used In day to day life to kill germs and prevent infections and disease transmissions.

Complete answer:
The chemical substances which are used to kill the germs are of two types, based on where they can be used, they are called by different names.
The chemical substance that is used on inanimate objects or non living things to kill germs are called disinfectants, and the ones which are used on living things are called antiseptics.
So disinfectants are the chemical agents which are used in the day in today life in various sectors, where it can damage microorganisms, it is not certain to kill the microbes where it can do damage in various ways like inactivating them, and destroying their spores, etc.
But many bacterial spores are resistant to disinfection, and this is generally done in various sectors such as hospital floors, and surgery rooms, and dental clinics and public places and household objects and floors, etc.
Commonly used disinfectants are alcohols such as ethyl alcohols and they also used aldehydes such as glutaraldehyde and Phenols of various forms are used in household disinfectant, and they also used in Mouthwashes and cresol given in options is the phenolic compound, which commonly used.

So, the correct option is A.

Note: The chemical agents which are used on non living things to kill the microorganisms, or to inactivate them are called disinfectants, and they use in various required sectors and are of various compounds, and disinfectants of low power are used to wash the hands are called as Sanitizers which are less effective than disinfectants.