Salt is commonly used in pickling because it acts as a preservative by drawing out moisture and creating a hypertonic environment. This inhibits the growth of microorganisms, allowing the pickle to last longer.
- (A) Enhance the colour of the pickle: While salt may affect the texture and preservation, it does not directly enhance the colour of the pickle.
- (B) Inhibit the growth of microorganisms: Correct. Salt helps in creating a hostile environment for the growth of microorganisms by drawing out water, which preserves the pickle.
- (C) Increase the nutritional value: Salt does not increase the nutritional value of the pickle; its main purpose is preservation.
- (D) Create a hypertonic solution: Correct. Salt creates a hypertonic solution by drawing out water, which helps in preserving the pickle by reducing the possibility of microbial growth.
The correct answer is (B) and (D), as salt is primarily used to inhibit the growth of microorganisms and to create a hypertonic solution.
Final Answer: (B) and (D).