Kerosene specification insight: A good-quality illuminating kerosene should exhibit which characteristic with respect to its smoke point?

Introduction:
Smoke point is a standard lamp-based test that indicates the sooting tendency of kerosene. Higher smoke point correlates with cleaner, brighter burning and fewer deposits in lamps and combustors. This question asks which attribute defines “good” kerosene for illumination.

Given Data / Assumptions:

• Kerosene is used in lamps and sometimes aviation; low soot is desirable.
• Aromatics lower smoke point; paraffinic content tends to raise it.

Concept / Approach:
Good kerosene should resist smoking; hence it should have a high smoke point. This usually coincides with lower heavy-aromatic content. Specifications often set minimum smoke point values to ensure satisfactory performance.

Step-by-Step Solution:

Verification / Alternative check:
Product specs list minimum smoke point values; batches below spec are reprocessed or blended down.

Why Other Options Are Wrong:

• Low smoke point: Indicates poor burning.
• High aromatics / low paraffins: Typically worsen smoke point.
• High olefins: Not a kerosene quality target; may harm stability.

Common Pitfalls:
Confusing density or energy content with smoke quality—smoke is primarily a sooting/combustion behaviour metric.

Final Answer:
High smoke point