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Haloalkanes and Haloarenes

Fill In the Blanks

341.

THE IUPAC name of CCl₄ is __________

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342.

Thionyl chloride reacts with alcohols in the presence of pyridine base to form _________.

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True Or False

343. State whether the following statements are True or False:

Ethylchloride is the most reactive halide of ethyl series.

Ethyl chloride may be converted to ethyl iodide by the action of sodium iodide.

Butene-1, CH₃CH₂CH = CH₂ is more stable than its isomer butene-2, CH₃CH = CHCH₃.

Tert butyl bromide reacts with aq KOH to give tertiary butyl alcohol as the major product.

Iodide is a stronger electrophile than boromide.

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344. State whether the following statements are True or False:

Carbon tetrachloride is inflammable.

The reaction of methyl magnesium bromide with acetone followed by hydrolysis gives a secondary alcohol.

Halogens have deactivating influence on the benzene ring.

2, 3, 4-trichloro pentane has three symmetric carbon atoms.

During S_N1 reaction, the leaving group leaves the molecule before the incoming group is attached to the moelcule.

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345. State whether the following statements are True or False:

m-chloro bromobenzene is an isomer of m-bromochloro benzene.

The reaction of vinyl chloride with hydrogen iodide to give 1-chloro-1-iodoethane is an of example of anti Markovnikoff’s rule.

Carbon tetrachloride burns in air when lighted to give phosgene.

The Grignard reagent R’MgX, gives the same product when treated with an alcohol, ROH or with an amine, RNH₂.

Haloarenes undergo electrophilic substitution at ortho and para position.

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Multiple Choice Questions

346. The IUPAC name of CH₃CH = CHCH₂Br is
1-Bromo-2-butene
1-Bromo-3-butene
2-Butene-1-bromide
4-Bromo-2-butene

1-Bromo-2-butene

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347.

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives

o-cresol
p-cresol
2, 4-dihydroxy toluene
Benzoic acid

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348.

Only two isomeric monochloro derivatives are possible for

n-hexane
2, 4-dimethyl pentane
benzene
2-methyl propane.

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349.

In the reaction:

$bold CH subscript bold 3 bold CH subscript bold 2 bold I bold space bold rightwards arrow with bold alc bold. bold space bold KOH on top bold space bold CH subscript bold 2 bold equals bold CH subscript bold 2 bold space bold rightwards arrow with bold Br subscript bold 2 on top bold space bold BrCH subscript bold 2 bold minus bold CH subscript bold 2 bold Br bold space bold rightwards arrow with bold KCN on top bold Z$