Haloalkanes and Haloarenes - Online Test

Q1.
The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride
chlorobenzenecyclohexyl chloride

Answer : Option D
Explaination / Solution:

Sp2 carbon is more electronegative than sp3 carbon.
Q2. Alkyl halides are insoluble in water
Answer : Option C
Explaination / Solution:

In alkyl halides, there exist dipole-dipole attractions where as in water van der waal's forces or the hydrogen bonding exists.. It is difficuilt for alkyl halides to break these hydrogen bonds, hence making them almost insoluble in water.

Q3. Hydrocarbons are prepared from Grignard reagent by
Answer : Option C
Explaination / Solution:

Grignard reagent abstracts acidic hydrogen from H2O forming alkane.

Q4. Grignard reagent should be prepared under anhydrous conditions because
Answer : Option C
Explaination / Solution:

R—MgX is very reactive.

Q5. The following compound is ,as per the IUPAC system
Answer : Option C
Explaination / Solution:

Longest chain contains double bond.

Q6. Name the following aryl halide as per the IUPAC system
Answer : Option D
Explaination / Solution:

At position 1 chloro group is present and at 2-methylpropyl is present.

Q7. Isomers of the compoundC4H9Br are
Answer : Option A
Explaination / Solution:



Q8. Hydrocarbons having double the number of carbon atoms than present in the original alkyl halide are produced by using
Answer : Option B
Explaination / Solution:

The Wurtz reaction, named after Charles-AdolpheWurtz, is a coupling reaction in organic chemistry, organometallic chemistry and recently inorganic main group polymers, whereby two alkyl halides arereacted with sodium metal in dry ethereal solution to form a higher alkane:

Q9. For alkanes containing odd number of carbon atoms, Wurtz reaction is not preferred. Because
Answer : Option C
Explaination / Solution:

In wurtz reaction many side products are formens whwn two different alkyl halides are used.

Q10. Necessary conditions for any system to be aromatic:
Answer : Option D
Explaination / Solution:

Aromaticity condition involves huckel rule (4n+2) Pie electrons. And proper delocalization of pie electron.