Which of the following will undergo addition reactions ?

Options

A. `CH_(4)`
B. `C_(3)H_(8)`
C. `C_(2)H_(6)`
D. `C_(2)H_(4)`

Answer

To determine which of the given compounds will undergo addition reactions, we need to analyze the types of hydrocarbons presented. Addition reactions typically occur in unsaturated hydrocarbons, such as alkenes and alkynes, while saturated hydrocarbons (alkanes) do not undergo such reactions.

**Step 1: Identify the compounds**
- The compounds given are:
1. CH4 (Methane)
2. C3H8 (Propane)
3. C2H6 (Ethane)
4. C2H4 (Ethene)

**Step 2: Classify the compounds**
- CH4 (Methane): This is an alkane (CnH2n+2), which is a saturated hydrocarbon.
- C3H8 (Propane): This is also an alkane (CnH2n+2), which is a saturated hydrocarbon.
- C2H6 (Ethane): This is again an alkane (CnH2n+2), which is a saturated hydrocarbon.
- C2H4 (Ethene): This is an alkene (CnH2n), which is an unsaturated hydrocarbon.

**Step 3: Determine which compounds can undergo addition reactions**
- Saturated hydrocarbons (alkanes) like CH4, C3H8, and C2H6 do not undergo addition reactions because they do not have double or triple bonds.
- Unsaturated hydrocarbons (alkenes and alkynes) can undergo addition reactions due to the presence of double or triple bonds. Ethene (C2H4) has a double bond, making it capable of undergoing addition reactions.

**Conclusion:**
The compound that will undergo addition reactions is C2H4 (Ethene).

**Final Answer: C2H4 (Ethene)**

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