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For SN1 reaction, rate is independent of:
ANucleophile concentration (only substrate ionization is RDS)
BSubstrate concentration
CSolvent
DRandom
Answer & Solution
Correct answer: A. Nucleophile concentration (only substrate ionization is RDS)
SN1: rate = k[R-X]. First order in substrate, zero order in nucleophile. Rate-determining step is R-X → R⁺ + X⁻ (slow). Nucleophile addition is fast (not in RDS).
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