2-Bromo-2-methylpropane is hydrolysed by the SN1 mechanism. If is doubled and is halved, the rate becomes ____.
Correct answer D. 2 times the original
Explanation
For SN1, rate = k[RX]; the nucleophile does not appear in the rate equation. Doubling [RX] doubles the rate, and halving [OH⁻] has no effect, so the rate becomes 2 times the original.
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