Question

Which compound is present in diesel?

• A. Cetane
• B. TiCl\(_4\)
• C. Cyclopentadienyl manganese carbonyl
• D. Iso octane

Hint:

Cetane (hexadecane) → Diesel quality (cetane number).
Iso-octane → Petrol quality (octane number).
Diesel contains straight-chain alkanes; petrol contains branched alkanes.

Answer 1

The Correct Option is A

To determine which compound is present in diesel among the given options, we need to understand the composition of diesel fuel. Diesel is a type of fuel derived from crude oil and is commonly used in diesel engines.

One of the key components in diesel is a hydrocarbon that is sued as a measure of its ignition quality. This compound is called Cetane.

Let's evaluate each option:

1. Cetane: Cetane is a hydrocarbon with the chemical formula C₁₆H₃₄. It serves as a standard for defining the cetane number of diesel fuels. Cetane number measures the combustion quality of the diesel, with higher numbers indicating better ignition quality.
2. TiCl₄: This is titanium tetrachloride, a compound used in various industrial applications but not in diesel. It is not a hydrocarbon.
3. Cyclopentadienyl manganese carbonyl (CpMn(CO)₃): This compound is an antiknock additive for gasoline, not a component of diesel.
4. Iso octane: Iso octane is used as a standard for rating octane numbers in gasoline, not diesel. It does not indicate ignition quality in diesel engines as cetane does.

From the analysis above, it is evident that Cetane is the compound present in diesel, used to assess the fuel's ignition quality.