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← ScienceWhich risk increases when excessive mechanical stress causes scission?
A)Increased free radical concentration✓
B)Hydrogen bond network failure
C)Elevated melting temperature transition
D)Covalent bond length reduction
💡 Explanation
Increased risk involves free radicals from scission, because chain breakage by homolytic cleavage is driven due to stress. Therefore, more free radicals appear, rather than bond length adjustments or melting temperature variances, which involve other mechanisms.
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