Alcohols Phenols and Ethers Test

Result

Alcohols Phenols and Ethers Test - 33

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Weekly Quiz Competition

Question 1
1 / -0

A vicinal diol has two alcoholic groups present :

A
on the same carbon

B
on adjacent carbon atoms

C
anywhere along the carbon chain

D
none of the above

Solution

Vicinal groups are those in which two functional groups are present on adjacent carbon atoms.

Option B is correct.
Question 2
1 / -0

How many structures of F is possible?

A
2

B
5

C
6

D
3

Solution

A. 2
1-Butene
2-Butene
Question 3
1 / -0

Electrophilic substitution reaction in phenol takes place at:

A
para position

B
meta position

C
ortho position

D
ortho and para position

Solution

Electrophilic substitution reaction in phenol takes place at ortho and para position. $$-OH$$ is an ortho para directing group.

The electron density at ortho and para positions will be higher than the electron density at meta position.
Question 4
1 / -0

The IUPAC name of $$CH_3\, -\, C(CH_3) (OH) CH_2\, -\, CH(CH_3)\, CH_3$$ is :

A
2, 4 - Dimethylpentan - 2 - ol

B
2, 4 - Dimethylpentan - 4 - ol

C
2, 2 - Dimethylbutane

D
Isopentanol

Solution
Question 5
1 / -0

Baeyers reagent is $$KMn{O}_{4}$$ in which medium?

A
Alkaline

B
Acidified

C
Neutral

D
Alkaline and acidified both

Solution

Baeyer's reagent, named after the German organic chemist Adolf von Baeyer, is used in organic chemistry as a qualitative test for the presence of unsaturation, such as double bonds. Baeyer's reagent is an alkaline solution of cold potassium permanganate, which is a powerful oxidant making this a redox reaction.
So answer is A.
Question 6
1 / -0

The major product obtained on acid - catalysed hydration of 2-phenylpropene is:

A
2-phenylpropan-2-ol

B
2-phenylpropan-1-01

C
3-phenylpropan-2-ol

D
1-phenylpropan-1-ol

Solution

The major product obtained on acid - catalysed hydration of 2-phenylpropene is 2-Phenylpropan-2-ol. A molecule of water is added to $$\displaystyle C=C$$ double bond. $$\displaystyle -OH$$ group is added to more substituted C atom.
Question 7
1 / -0

Among ethanol, dimethyl ether, methanol and propanal, the isomers are

A
ethanol, dimethyl ether, methanol and propanal

B
ethanol and methanol

C
ethanol, dimethyl ether, and methanol

D
ethanol and dimethyl ether

Solution

Ethanol $$(C_2H_5OH)$$ and dimethyl ether $$(CH_3-O-CH_3)$$ have same molecular formula but different functional groups, so they are isomers.
Question 8
1 / -0

What are the types of reactions occurring in the formation of X, Y and Z respectively?

A
Oxidation, Reduction, Substitution

B
Substitution, Esterification, Dehydration

C
Reduction, Substitution, Oxidation

D
Dehydration, Oxidation, Esterification

Solution

Reactions:
$$CH_3CH_2OH \xrightarrow {conc. H_2SO_4} CH_2 = CH_2$$ dehydration
$$CH_3CH_2OH \xrightarrow {oxidation} CH_3COOH$$ oxidation
esterification
Question 9
1 / -0

Refer the given reactions and answer the following questions:
Identify X, Y and Z respectively:

A
$$\displaystyle CH_{3}COOH,CH_{2}= CH_{2},CH_{3}COOCH_{3}$$

B
$$\displaystyle CH_{2}= CH_{2},CH_{3}COOH,CH_{3}COOCH_{2}CH_{3}$$

C
$$\displaystyle HCHO,CH_{3}CH_{3},CH_{3}CH_{2}COOH $$

D
$$\displaystyle CH_{3}CH_{3},HCHO,CH_{3}COOH $$

Solution

Reactions:
$$CH_3CH_2OH \xrightarrow {conc. H_2SO_4} CH_2 = CH_2$$
$$CH_3CH_2OH \xrightarrow {oxidation} CH_3COOH$$
Question 10
1 / -0

Methanol is now prepared from:

A
water gas

B
sugar through fermentation

C
wood

D
both $$A$$ and $$B$$

Solution

On an industrial scale, methanol is predominantly produced from natural gas by reforming the gas with steam and then converting and distilling the resulting synthesized gas mixture to create pure methanol. The result is a clear, liquid, organic chemical that is water-soluble and readily biodegradable.
Some methanol can be produced during fermentation, but this is not derived from the ethanol or by carbohydrate oxidation. It is produced in small amounts, either by non-enzymatic reactions or through the reduction of formaldehyde.