Alcohols Phenols and Ethers Test

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Alcohols Phenols and Ethers Test - 34

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Weekly Quiz Competition

Question 1
1 / -0

Identify the stereoisomeric pair from the following choices

A
$$CH_3 CH_2 CH_2 OH$$ and $$CH_3 CH_2 OCH_3$$

B
$$CH_3 CH_2 CH_2 Cl$$ and $$CH_3 CHClCH_3$$

C

D

Solution

cis and trans are stereoisomeric pair.
Question 2
1 / -0

What is the common name of methyl alcohol?

A
Wine

B
Wood spirit

C
Dilute acid

D
None of the above

Solution

Methanol acquired the name wood spirit because it was once produced chiefly by the destructive distillation of wood.
Question 3
1 / -0

Among the four compounds (i) acetone, (ii) propanol, (iiii) methyl acetate and (iv) propionic acid, the two that are isomeric are

A
methyl acetate and acetone

B
methyl acetate and propanol

C
propionic acid and methyl acetate

D
propionic acid and acetone

Solution

Propionic acid and methyl acetate both have same molecular formula $$(C_3H_6O_2)$$ but different functional groups, so they are isomers.
Question 4
1 / -0

The product formed by decolourization of $$KMn{O}_{4}$$ by ethylene is _________ which is used as ______.

A
ethane, oxidant

B
ethyl alcohol, coolant

C
ethylene glycol, antifreeze

D
ethanol, reductant

Solution

When ethylene react with $$KMnO_4$$, than pink colour of $$KMnO_4$$ gets disappear and ethylene gets converted with ethylene glycol.
Question 5
1 / -0

Which among the following reactions does not give methyl alcohol?

A
The reaction of ethylene with $${H}_{2}{SO}_{4}$$ at $${80}^{o}C$$

B
The reaction of water gas with hydrogen at high temperature

C
Alkaline hydrolysis of methyl bromide

D
Both $$A$$ and $$B$$

Solution

The reaction of ethylene with $${H}_{2}{SO}_{4}$$ at $${80}^{o}C$$ gives ethyl hydrogensulphate.
$$CH_2=CH_2+H_2SO_4 \rightarrow CH_3CH_2OSO_2OH$$
Water gas (carbon monoxide and hydrogen) at high temperature gives methanol.
$$CO + 2H_2 \rightarrow CH_3OH$$.
Alkaline hydrolysis of methyl bromide gives methanol
$$CH_3Br + H_2O \rightarrow CH_3OH + HBr$$
Question 6
1 / -0

The molecular formula of ethanol is :

A
$$(CH_3)_2 CHOH$$

B
$$C_2 H_5 OH$$

C
$$CH_3 OH$$

D
$$CH_3 CH_2 CH_2 OH$$

Solution

$$(CH_3)_2CHOH$$ is 2-propanol or isopropyl alcohol, $$CH_3OH$$ is methanol, $$CH_3CH_2CH_2OH$$ is 1- propanol or isopropyl alcohol.
The compound in option B is ethanol. It is hydroxyl derivative of ethane.
Question 7
1 / -0

Glycol is a:

A
primary alcohol

B
dihydric alcohol

C
secondary alcohol

D
trihydric alcohol
Question 8
1 / -0

Which of the following compounds has highest boiling point?

A
Propan -1-ol

B
n - butane

C
Chloroethane

D
Propanal

Solution

Those with strong intermolecular forces will have high melting and boiling points. The hydrogen bond is stronger intermolecular forces.

As branching increases boiling point decreases. Propan-1-ol has highest boiling point because propan-1-ol contain H-bonding in their structure.

So answer option A is correct.
Question 9
1 / -0

In the following reation,
$$\underset{(in\ excess)}{Ethyl \ alcohol}+\underset{(from\ H_2SO_4)}{H^+}\overset{413K}{\rightarrow}$$ product, the product is:

A
ethene

B
ethyl hydrogen sulphate

C
diethyl ether

D
acetylene

Solution

Ethyl alcohol when reacts with conc. $$H_2SO_4$$, it forms diethyl ether as a product.
$$C_2H_5-OH \xrightarrow[conc.H_2SO_4]{413K} \underset{Diethyl\ ether}{C_2H_5-O-C_2H_5}$$
At higher temperature, the ethyl undergoes elimination reaction to from ethene as a product.
Question 10
1 / -0

The suffix used in the nomenclature of alcohol is:

A
'al'

B
'ol'

C
'yl'

D
'one'

Solution

According to IUPAC system suffix for alcohols is ' ol'

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Alcohols Phenols and Ethers Test - 34

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Alcohols Phenols and Ethers Test - 34

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SHARING IS CARING

Question 1

$$CH_3 CH_2 CH_2 OH$$ and $$CH_3 CH_2 OCH_3$$

$$CH_3 CH_2 CH_2 Cl$$ and $$CH_3 CHClCH_3$$

Solution

Question 2

Wine

Wood spirit

Dilute acid

None of the above

Solution

Question 3

methyl acetate and acetone

methyl acetate and propanol

propionic acid and methyl acetate

propionic acid and acetone

Solution

Question 4

ethane, oxidant

ethyl alcohol, coolant

ethylene glycol, antifreeze

ethanol, reductant

Solution

Question 5

The reaction of ethylene with $${H}_{2}{SO}_{4}$$ at $${80}^{o}C$$

The reaction of water gas with hydrogen at high temperature

Alkaline hydrolysis of methyl bromide

Both $$A$$ and $$B$$

Solution

Question 6

$$(CH_3)_2 CHOH$$

$$C_2 H_5 OH$$

$$CH_3 OH$$

$$CH_3 CH_2 CH_2 OH$$

Solution

Question 7

primary alcohol

dihydric alcohol

secondary alcohol

trihydric alcohol

Question 8

Propan -1-ol

n - butane

Chloroethane

Propanal

Solution

Question 9

ethene

ethyl hydrogen sulphate

diethyl ether

acetylene

Solution

Question 10

'al'

'ol'

'yl'

'one'

Solution

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