The minimum magnitude of heat of hydrogenation per mole of molecule is of:

Options

A.
B.
C.
D.

Answer

To solve the question regarding the minimum magnitude of heat of hydrogenation per mole of a molecule, we will follow these steps:

### Step 1: Understand the Concept of Heat of Hydrogenation
The heat of hydrogenation is the enthalpy change that occurs when an alkene is hydrogenated in the presence of a catalyst. It is an exothermic process, meaning that heat is released when hydrogen is added to the alkene.

### Step 2: Identify the Relationship Between Double Bonds and Heat of Hydrogenation
The heat of hydrogenation is directly proportional to the number of double bonds present in the molecule. This means that the more double bonds there are, the greater the heat of hydrogenation will be. Conversely, fewer double bonds will result in a lower heat of hydrogenation.

### Step 3: Analyze the Given Options
Let’s assume the options provided are:
- A: Compound with 3 double bonds
- B: Compound with 2 double bonds
- C: Compound with 1 double bond
- D: Compound with no double bonds

### Step 4: Determine the Minimum Magnitude
From our understanding:
- The compound with 3 double bonds will have the highest heat of hydrogenation.
- The compound with 2 double bonds will have a lower heat of hydrogenation than the one with 3 double bonds.
- The compound with 1 double bond will have an even lower heat of hydrogenation.
- The compound with no double bonds will have the lowest heat of hydrogenation since it does not undergo hydrogenation.

### Step 5: Conclusion
Thus, the compound with the least number of double bonds (which is the compound with no double bonds) will have the minimum magnitude of heat of hydrogenation. Therefore, the correct answer is the compound with no double bonds.

### Final Answer:
The minimum magnitude of heat of hydrogenation per mole of molecule is of the compound with no double bonds.

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