Haloalkanes and Haloarenes Test

Result

Haloalkanes and Haloarenes Test - 56

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

Which of the following is the example of $$SN^2$$ reaction

A
$$CH_3 Br + OH^- - CH_3OH + Br^-$$

B
$$CH_3 CH \underset{Br}{\underset{|}{CH_3}} + OH^- \rightarrow CH_3 \underset{OH}{\underset{\!\!\!\!\!|}{CH}}CH_3 + Br^-$$

C
$$CH_3 CH_2 OH \xrightarrow{-H_2O} CH_2 = CH_2$$

D
$$CH_3 - \underset{Br}{\underset{|}{\overset{CH_3\!\!\!\!\!}{\overset{|}{C}}}} - CH_3 + OH^- \rightarrow CH_3 - \underset{H}{\underset{|}{\overset{CH_3\!\!\!\!\!}{\overset{|}{C}}}} - O - CH_3 + Br^-$$

Solution

Only $$1^\circ$$ alkyl halides, i.e. $$CH_3Br$$ undergoes $$S_{N}2$$ reaction. Lesser the bulkier group attached to the attacking carbon higher is its reactivity towards $$S_N2$$ reaction.
Option A is correct.
Question 2
1 / -0

When ethyl chloride and alcoholic $$KOH$$ are heated , the compound obtained is

A
$$C_2H_4$$

B
$$C_2H_2$$

C
$$C_6H_6$$

D
$$C_2H_6$$

Solution

We know that
$$CH_3CH_2Cl + KOH \rightarrow CH_2 = CH_2 + KCl + H_2O$$
Thus in reaction ethene $$(C_2H_4)$$ is produced.
Question 3
1 / -0

The reaction
$$CH_3CH=CH_3\xrightarrow[H^{+}]{CO+H_{2}O}CH_{3}-CH-CH_{3}$$

$$COOH$$

is known as

A
Wurtz reactions

B
Koch reaction

C
Clemensons reduction

D
Kolbes reaction

Solution
Question 4
1 / -0

The reaction of benzene with chlorine in the presence of iron gives

A
Benzene hexachloride

B
Chlorobenzene

C
Benzyl chloride

D
Benzoyl chloride

Solution

The reaction between benzene and chlorine in the presence of either aluminium chloride or iron gives chlorobenzene.
Question 5
1 / -0

Ethylidine dichloride can be prepared by the reaction of $$HCl$$ and

A
$$C_{2}H_{4}$$

B
$$C_{2}H_{2}$$

C
$$C_{2}H_{5}$$

D
All of these

Solution

Ethylidene chloride can be prepared by the reaction of $H C l$ and acetylene$$C_2H_2$$.
Question 6
1 / -0

Which of the following is liquid at room temperature

A
$$CH_3I$$

B
$$CH_3Br$$

C
$$C_2H_5Cl$$

D
$$CH_3F$$

Solution

$$CH_3F , CH_3Cl , CH_3Br$$ and $$C_2H_5Cl$$ are gases at room temperature. $$CH_3I$$ is a liquid at room temperature and solidifies at $$-66.5^\circ C.$$

Option A is correct.
Question 7
1 / -0

When benzene is heated with chlorine in the presence of sunlight , it forms

A
$$B.H.C.$$

B
Cyclopropane

C
p - dichlorobenzene

D
None of these

Solution

When benzene is heated with chlorine in the presence of sunlight , it form benzene hexachloride.
Question 8
1 / -0

Which metal is used in Wurtz synthesis

A
$$Ba$$

B
$$Al$$

C
$$Na$$

D
$$Fe$$

Solution

$$CH_3Br + 2Na + Br - CH_3 \xrightarrow[Ether]{Dry} CH_3CH_3 + 2NaBr$$

Sodium metal is used.
Question 9
1 / -0

Which is formed when benzene is heated with chlorine in the presence of sunlight

A
$$C_{6}H_{5}CCl_{3}$$

B
$$C_{6}H_{5}CHCl_{2}$$

C
$$C_{6}H_{5}CH_{2}Cl_{2}$$

D
$$C_{6}H_{5}Cl_{6}$$

Solution

The ring delocalisation is permanently broken and a chlorine or bromine atom adds on to each carbon atom. For example, if you bubble chlorine gas through hot benzene exposed to UV light for an hour, you get 1,2,3,4,5,6-hexachlorocyclohexane or benzenehexachloride.
Question 10
1 / -0

Directions For Questions

In the following sequence of reactions, the products $$(A)$$ to $$(G)$$ are formed:

...view full instructions

Compound $$(F)$$ is:

A
Mesitylene

B
$$1,2,3-$$ Triethylbenzene

C
$$1,2,3-$$ Trimethylbenzene

D
$$1,3,5-$$ Trimethylbenzene

Solution

Compound $$(F)$$, answer is $$(d)$$