Question

The functions of cork stopper are:
A. Restricts the vapor of the container to go out
B. Helps in condensation
C. Restricts moisture to come in contact with the solution
D. Both A and B

Answer 1

Hint: Cork occurs in nature and there is no need to prepare it artificially. The remarkable properties like elasticity, good insulator and lightweight makes the cork to use in laboratories for different purposes.

Complete answer:
- In the question it is asked to find the correct functions of the cork among the given options.
- Coming to given options, option A. Restricts the vapor of the container to go out.
- Yes cork has a property to restrict the vapor of the container due to its non-porous nature.
- Therefore the option A is correct.
- Coming to option B, Helps in condensation.
- Yes option B is correct because when cork is applied to glass apparatus it won’t allow the solvent to evaporate from the apparatus and makes the solvent vapor to condense in the glass apparatus itself.
- Therefore option B is also correct.
- Coming to option C, Restricts moisture to come in contact with the solution.
- Cork won’t stop the moisture from coming in contact with the solution. Therefore option C is wrong.
- So, the options A, B are correct regarding the cork.

Therefore the correct option is D.

Note:
Due to the good properties of the cork it is going to be used to cover the wine bottles to prevent the air from coming in and stops the evaporation of the liquid from inside. Cork is a bad conductor means it is going to act as an insulator.