Alkenes react with strong halogen acids (HX) in inert solvents to givé (a) alkan

Question

Alkenes react with strong halogen acids (HX) in inert solvents to givé (a) alkanes (b) alcohols (c) alkyl halides (d) alkenyl halides 1. 2. Alkenes react with aqueous acids to give (a) alkanes (b) alcohols (c) alkyl halides (d) alkenyl halides 3. Alkenes react in acidic alcoholic solutions to give (a) alcohols (c) alkyl halides (d) ethers Mercury(II)-catalyzed addition of water to alkenes gives (a) alkanes (b) alcohols (c) ethers (d) hydride shifts 4. 5. The reaction of an alkene with borane followed by reaction with basic hydrogen peroxide gives (a) Markovnikov aduition of water (b) anti-Markovnikov addition of water (c) a dialcohol (d) a methyl shin The addition of borane to an alkene involves a (a) radical intermediate (b) carbocation intermediate (c) four-membered transition state (d) rearrangement reaction 6· The reaction of an alkene with borane followed by addition of bromine in basic alcohol gives a(n) (a) alkene (b) alkyl bromide (c) bromohydrin (d) dibromide Borane is used for theof HBr from/to an alkene. 7. 8.

Explanation / Answer

1.

Alkene + HX -----------> Alkyl halide

(c)

2.

alkene + dilute acid ------------> Alcohol

(b)

3.

(d) Ethers

Alkene + alcohol/acid ------------> Ether

4.

(b) Alcohols

5.

(b) Anti - Markovnikoff's addition of water

6.

(b) Carbocation intermediate

7.

(b) Alkyl bromides

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