Hydrocarbons Test

Result

Hydrocarbons Test - 72

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Weekly Quiz Competition

Question 1
1 / -0

The compound that is most reactive towards electrophilic substitution is:

A
Toluene

B
Benzene

C
Nitrobenzene

D
Benzoic acid

Solution

The reactivity of compound towards electrophilic substitution
depends on the electron density present on the compound.
The higher the electron density, the more reactive will be
the compound towards electrophilic substitution.

Here, toluence is most reactive towards electrophilic
substitution as the presence of methyl group induces
electron donating effect which increases the electron
density.

Since, option A is correct.
Question 2
1 / -0

Ethene when treated with $$Br_{2}$$ in the presence of $$CCl_{4}$$ which compound is formed?

A
1, 2-dibromoethane

B
1-bromo-2-chloroethane

C
Both (A) and (B)

D
1, 1, 1 - tribromoethane

Solution

Ethene when treated with $$Br_{2}$$ in the presence of $$CCl_{4},$$ 1, 2-dibromoethane is formed.

$$CH_{2}=CH_{2} + Br_{2}\xrightarrow {CCl_{4}} \underset{1 , 2-dibromoethane}{\underset{Br}{\underset{|}{CH_{2}}}-\underset{Br}{\underset{|}{CH_{2}}}}$$
Question 3
1 / -0

$$IUPAC$$ came of $$(CH_3)_2CHCH(CH_3)_2$$ is

A
$$1,1,2,3-$$tertamethylethane

B
$$1,2-$$di-isotropylethane

C
$$2,3-$$dimethylbutane

D
$$2,3,3-$$trimethylbutane

Solution
Question 4
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An aromatic compound $$X (C_{9}H_{8}0_{3})$$ turns blue litmus to red. It gives yellow precipitate with $$I_{2}/NaOH$$ and forms $$Y(C_{8}H_{6}O_{4}$$. $$Y$$ forms three mononitro isometric products. Identify $$X$$.

A

B

C

D
None of these

Solution
Question 5
1 / -0

Final product of the given reaction sequence is:

A

B

C

D

Solution

Option C is correct.
Question 6
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The $$IUPAC$$ name of $$\begin{matrix} \ \ \ \quad \quad CH_{ 3 }CH_{ 2 }CHCH_{ 2 }CH_{ 2 }CH_{ 3 } \\ | \\ { CH }_{ 3 } \end{matrix}$$ is

A
$$4-$$methylhexane

B
$$3-$$methylhexane

C
$$2-$$propylbutane

D
$$2-$$ethylpentane

Solution
Question 7
1 / -0

Observe the following sequence of reaction.

$$CH_3 CH_2 - CH_3 \xrightarrow [(1)]{Br_2 / hv} (X) \xrightarrow [(2)]{Mg / ether} (Y) \xrightarrow [(3)] {CH_3 - Br} (Z) \xrightarrow [(4)]{Cl_2/hv} (W) \xrightarrow[(5)] {CH_3OH} (R)$$

The product $$R$$ is:

A

B

C

D

Solution
Question 8
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Freon-$$114$$ used in refrigerator and air conditioners is $$1, 2-$$dichlorotetrafluoroethane. Its structural formula is:

A

B

C

D
Question 9
1 / -0

The $$IUPAC$$ name of the compound $$\begin{matrix} \quad \quad \quad{ CH }_{ 3 }-CH-{ CH }_{ 2 }-{ CH }_{ 2 }Cl \\ | \\ { CH }_{ 3 } \end{matrix}$$ is

A
$$1-$$Chloro$$-3-$$methylbutane

B
$$2-$$methyl$$-4-$$chlorobutane

C
$$2-$$methyl$$-1-$$crotonaldehyde

D
$$1-$$chloropentane

Solution
Question 10
1 / -0

$$IUPAC$$ name of the following are

A
$$3-$$dimethylamino$$-3-$$methyl pentano

B
$$3-(N,N-Trimethyl)-3-$$aminopentane

C
$$3-(N.N-Trimethyl)$$pentanammine

D
$$3-N,N-$$ dimethyl ammino$$-3-$$methyl pentane