First reaction is SN1 in which rate does not depend on conc. of nucleophile.
Second reaction is E2 reaction in which rate depends on conc. of base.
JEE Main 2020 — Chemistry Organic Chemistry
Consider the reaction sequence given below :

Which of the following statements is true:
Held on 2 Sept 2020 · Verified 6 Jul 2026.
Changing the base from OH⊖ to OR⊖ will have no effect on reaction (2)
Changing the concentration of base will have no effect on reaction (1)
Doubling the concentration of base will double the rate of both the reactions
Changing the concentration of base will have no effect on reaction (2)
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