Match the following:
`{:((i), "Heating of alkyl halide", (a), "Complex of ether with"),(,"and sodium alkoxide",, "Lewis acid"),( (ii), "Lewis base", (b), "Combination of ether with"),(,,, "inorganic acid"),( (iii), "Oxonium salt", (c ) , "Willamson synthesis"),( (iv), "Etherate", (d), "Ether"),( (v),"Tetrahydrofuran", (e ), "Cyclic ether"):}`

Answer

To solve the matching question, we need to analyze each item in the list and find the correct pairings.

### Step-by-Step Solution:

1. **Identify the first item (i)**: "Heating of alkyl halide"
- This process is associated with the **Williamson synthesis**, which involves the reaction of an alkyl halide with sodium alkoxide to produce an ether.
- **Match**: (i) → (c) "Williamson synthesis"

2. **Identify the second item (ii)**: "Lewis base"
- A Lewis base is a substance that can donate an electron pair. Ethers can act as Lewis bases due to the lone pairs on the oxygen atom.
- **Match**: (ii) → (a) "Complex of ether with Lewis acid"

3. **Identify the third item (iii)**: "Oxonium salt"
- An oxonium salt is formed when an ether reacts with an inorganic acid, leading to the formation of a protonated ether.
- **Match**: (iii) → (b) "Combination of ether with inorganic acid"

4. **Identify the fourth item (iv)**: "Etherate"
- Etherate refers to a complex formed between an ether and a Lewis acid, often used in coordination chemistry.
- **Match**: (iv) → (d) "Ether"

5. **Identify the fifth item (v)**: "Tetrahydrofuran"
- Tetrahydrofuran (THF) is a cyclic ether, specifically a five-membered ring containing oxygen.
- **Match**: (v) → (e) "Cyclic ether"

### Final Matching:
- (i) → (c) "Williamson synthesis"
- (ii) → (a) "Complex of ether with Lewis acid"
- (iii) → (b) "Combination of ether with inorganic acid"
- (iv) → (d) "Ether"
- (v) → (e) "Cyclic ether"