Hydrocarbons Test

Result

Hydrocarbons Test - 35

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Weekly Quiz Competition

Question 1
1 / -0

For synthesis of 1 -butene, $$CH_3MgI$$ should be treated with :

A
propene

B
2 - chloropropene

C
allyl chloride

D
ethyl chloride

Solution
Question 2
1 / -0

Reaction of $$trans-2-phenyl -1-bromocyclopentane$$ on reaction with alcoholic $$KOH$$ produces (major):

A
$$4-phenylcyclopentene$$

B
$$2-phenylcyclopentene$$

C
$$1-phenylcyclopentene$$

D
$$3-phenylcyclopentene$$

Solution

It follows E2 mechanism. Hughes and Ingold proposed that bimolecular elimination reactions take place when the two groups to be eliminated are trans and lie in one plane with the two carbon atoms to which they are attached. E2 reactions are stereoselectively trans
The correct is option D.
Question 3
1 / -0

$$CH_3-C\equiv C-CH_3 \xrightarrow { Na/NH_ 3(l) } P\xrightarrow { { CH }_{ 2 }{ I }_{ 2 }Zn\Delta } $$ product is:

A

B

C

D

Solution
Question 4
1 / -0

An alkane containing atleast_____ carbon atoms is converted into an aromatic hydrocarbon, when heated in presence of $$Cr_{2}O_{3}$$ on $$Al_{2}O_{3}$$

A
$$6$$

B
$$4$$

C
$$3$$

D
$$5$$

Solution
Question 5
1 / -0

The major product (A) is

A

B

C

D

Solution
Question 6
1 / -0

The given pair is an example of:

A
Enantiomers

B
Diasteremers

C
Identical

D
Constitutional isomers
Question 7
1 / -0

Electrolysis of aq. solution of sodium salt of saturated dicarboxylic acids, give

A
alkyne

B
alkene

C
alkane

D
none of these

Solution

$$\text{Sodium or potassium salt of a dicarboxylic acid on electrolysis gives an }alkene.$$ An alkene is generated when an aqueous solution of sodium or potassium salt of a dibasic acid ( with adjacent carboxylic groups ) is electrolyzed. The electrolysis of sodium succinate gives ethene.

Hence, option B is correct.
Question 8
1 / -0

Ethanol reacts with $$CH_3Mgl$$ gives

A
Ethane

B
Isoproply alcohol

C
Acetaldehyde

D
Methane

Solution
Question 9
1 / -0

The IUPAC name of $$(CH_3)_3C-CH=CH_2$$ is?

A
$$2, 2$$-dimethylbut-$$2$$-ene

B
$$2, 2$$-dimenthylpent-$$3$$-ene

C
$$3, 3$$-dimethylbut-$$1$$-ene

D
Hex-$$1$$-ene

Solution
Question 10
1 / -0

The final product formed when ethyne and acetic acid reacts on presence of $$H_2SO_4$$ and $$HgSO_4$$ is:

A
Vinyl acetate

B
Ethyl acetate

C
Acetylene acetic acid

D
Ethylidene acetate

Solution

Option A is correct.