Which process helps in hardening of rubber?

Options

A. Galvanisation
B. Vulcanization
C. Conduction
D. Induction

Answer

To answer the question "Which process helps in hardening of rubber?", we can follow these steps:

### Step 1: Understand the Options
We need to evaluate the given options to determine which one is related to the hardening of rubber. The options provided are:
1. Galvanization
2. Vulcanization
3. Conduction
4. Induction

### Step 2: Analyze Each Option
- **Galvanization**: This is a process used to coat iron with a protective layer of zinc to prevent rusting. It does not relate to rubber hardening. Therefore, this option is incorrect.

- **Vulcanization**: This process involves heating rubber with sulfur. During vulcanization, sulfur forms cross-links between the polymer chains of rubber, which increases its hardness, tensile strength, and elasticity. This is the correct process for hardening rubber.

- **Conduction**: This refers to the transfer of heat or electricity through materials. It does not involve any hardening process for rubber. Thus, this option is incorrect.

- **Induction**: This is a process that involves inducing an effect, such as the inductive effect in chemistry, but it does not relate to the hardening of rubber. Therefore, this option is also incorrect.

### Step 3: Conclusion
After analyzing all the options, we find that the process that helps in hardening rubber is **Vulcanization**.

### Final Answer
The process that helps in hardening of rubber is **Vulcanization**.

---