SN1 or SN2: mechanism and product under a given nucleophile and solvent

1. A.
   Reaction (I) is of $2^{\text{nd~}}$ order and reaction (II) is of $1^{\text{st~}}$ order
2. B.
   Reaction (I) and (II) both are of $2^{\text{nd~}}$ order
3. C.
   Reaction (I) is of $1^{\text{st~}}$ order and reaction (II) is of $2^{\text{nd~}}$ order
4. D.
   Reactions (I) and (II) both are of $1^{\text{st~}}$ order

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1. A.
   $S_{N}2$, $A =$ iso-butyl ethyl ether; $S_{N}1$, $B =$ tert-butyl ethyl ether
2. B.
   $S_{N}1$, $A =$ tert-butyl ethyl ether; $S_{N}1$, $B =$ 2-butyl ethyl ether
3. C.
   $S_{N}1$, $A =$ tert-butyl ethyl ether; $S_{N}2$, $B =$ isobutyl ethyl ether
4. D.
   $S_{N}2$, $A =$ 2-butyl ethyl ether; $S_{N}2$, $B =$ isobutyl ethyl ether

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1. A.
   Statement I is true but Statement II is false.
2. B.
   Statement I is false but Statement II is true.
3. C.
   Both statement I and Statement II are false.
4. D.
   Both statement I and Statement II are true.

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