Haloalkanes and Haloarenes Test

Result

Haloalkanes and Haloarenes Test - 53

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Pure methane can be produced by:

A
Wurtz reaction

B
Kolbe's electrolytic

C
soda lime decarboxylation

D
reduction with $$H_2$$

Solution

Soda line decarboxylation reaction can produce pure methane.
$$ CH_3 COONa + NaOH \xrightarrow[Cao]{\Delta } CH_4 + Na_2 \,CO_3$$
Question 2
1 / -0

Given Reaction.
Y in reaction is:

A
Hexane

B
Cyclohexane

C
Cyclohexylcyclohexane

D
Cyclohexylether

Solution

(Refer to Image)
When $$Mg$$ in presence of ether reacts known as Grignard reagent and this form salt with halogen. Then $$H_2O$$ and $$HCl$$ provide $$H^+$$ in place of $$MgBr$$. This is an example of substitution reaction.
Question 3
1 / -0

To prepare a pure sample of normal hexane using sodium metal as one reactant, the other reactant or reactants will be:

A
Ethyl chloride and n-butyl chloride

B
Methyl bromide and n-pentyl bromide

C
n-propyl bromide

D
ehtyl bromide and n-butyl bromide

Solution

Option C is correct answer
Question 4
1 / -0

$$wC_{2}H_{6}+xI_{2}+HIO_{3}\rightarrow y C_{2}H_{5}I+z H_{2}O$$ the value of $$w,x,y,z$$ are:

A
$$5,2,5,3$$

B
$$5,5,2,3$$

C
$$5,3,5,2$$

D
$$2,2,2,1$$

Solution

$$5{C}_{2}{H}_{6} + 2{I}_{2} + HI{O}_{3} \rightarrow 5{C}_{2}{H}_{5}I + 3{H}_{2}O$$
The given reaction is an iodonation of ethane to get ethanoic acid. Here $$HIO_3$$ act as an oxidizing agent.
After balancing the reaction the value of $$w,x,y,z$$ are
$$w,x,y,z = 5,2,5,3$$

Option A is correct
Question 5
1 / -0

In which of the following compound the electrophile attack on o- and p- position :

A

B

C

D

Solution
Question 6
1 / -0

The product obtained on reaction of $$C_2 H_5 Cl$$ with hydrogen over palladium carbon is:

A
$$C_3H_8 $$

B
$$ C_4H_{10} $$

C
$$ C_2H_6 $$

D
$$ C_2H_4 $$

Solution
Question 7
1 / -0

Which among the following compounds is used to decaffeinate coffee?

A
Iodoform

B
Carbon tetrachloride

C
Methylene dichloride

D
Chloroform

Solution

The two most commonly used solvents for decaffeinating coffee today are methylene dichloride and ethyl acetate.

After soaking in these, the coffee beans are steamed, dried, and roasted. These processes ensure that no residual solvent remains in the beans. Soaking coffee beans in solvent removes caffeine as it dissolves in the solvent.

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

$$ S_n^1 $$ reaction is favoured by:

A
Bulky groups on the carbon atom attached to halogen atom

B
Small groups on the carbon attached to halogen atom.

C
None -polar solvents

D
None of the above

Solution

$$S_{N^1}$$ mechanism proceeds through carbocation formation and as stability of carbocation increases, it favours $$S_{N^1}$$ mechanism and as we add bulky group to carbon attached with halogen, carbocation formed will become more stable due to $$+I$$ effect of bulky alkyl group so it favours $$S_{N^1}$$ mechanism.
Question 9
1 / -0

The hydrolysis of 2-bromo-3-methyl butane by $$ S_N1 $$ mechanism gives mainly

A
3-methyl-2-butanol

B
2-methyl-2-butanol

C
2,2-dimethyl-2-propanol

D
2-methyl-1-butanol

Solution

Mechanism of hydrolysis of 2-bromo-3-methyl butane is given above.
The product formed is 2-methyl-2-butanol.

Hence, Option "B" is the correct answer.
Question 10
1 / -0

$$CH_3-\overset{CH_3}{\overset{|}{C}H}-CH_2-CH_2-\underset{O}{\underset{||}{C}}-CH_3 \xrightarrow[]{H_2/Pd}$$No. Of stereoisomerism.

A
$$2$$

B
$$4$$

C
$$8$$

D
$$6$$

Solution

$$CH_3-\underset{\,\,\,\,CH_3}{\underset{|}{C}}=CH-CH_2-\underset{O}{\underset{||}{C}}-CH_3 \xrightarrow []{H_2/Pd/C}CH_3-\underset{\,\,\,\,CH_3}{\underset{|}{C}}-CH_2-CH_2-\underset{OH}{\underset{|}{C}H}-CH_3$$
Total number of stereo isomer = $$2$$