Which risk increased during early European gunpowder refinement?

💡 Explanation

Runaway reactions increased because early sulphur purification involved heating sulphur, often leading to uncontrolled and rapidly escalating combustion (thermal runaway), therefore the risk of explosions increased rather than nitrogen or saltpeter issues occurring.

• Which consequence resulted when early Aztec terrace-farming over-intensified?
• While using a historical astrolabe at sea, imprecise leveling of the instrument introduces which effect?
• Which risk increased during the Bronze Age collapse due to impurities in smelted copper ore?
• Which outcome arises when bloomery iron processing lacks careful reduction in early furnaces?
• Which consequence resulted from decreased water supply influencing the Persian wheel irrigation systems during the Mughal Empire?
• Which risk increases when a water-powered flour mill's millstone rotational speed exceeds design limits?