Alcohol, Phenol and Ether Test

Result

Alcohol, Phenol and Ether Test - 20

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Weekly Quiz Competition

Question 1
1 / -0

Only One Option Correct Type
Direction (Q. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
The correct order of acidic strength of the following alcohols is

A

B

C

D

Solution

Electron donating (+ / -effect) alkyl groups decreases the acidic strength.
Question 2
1 / -0

Among the alkenes which one produces tertiary butyl alcohol on acid hydration

A
(CH₃)₂C = CH₂

B
CH₃ – CH = CH – CH₃

C
CH₃ – CH₂ – CH = CH₂

D
CH₃ – CH = CH₂
Question 3
1 / -0

Which compound given below has the highest solubility in water ?

A
CH₃OH

B
CH₃CH₂OH

C
HO—CH₂CH₂—OH

D
HO—CH₂—CH(OH)—CH₂OH

Solution

Greater the number of hydroxy groups , greater its a bility to form H-bonds with water, hence greater solubility.
Question 4
1 / -0

What is the correct increasing order of acidity of the following?

A
I < II < III < IV

B
IV < III < II < I

C
I < II < IV < III

D
II < I < IV < III

Solution

Both (I) and (II) are 2° alcohols, less acidicthan (I) and (IV) where there is electron withdrawing chloride group is present. Between (I) and (II), (I) is less acidic as ring is considered here equivalent to two ethyl groups attached to α-carbon. (Ill) is more acidic than (IV) because in (III) Cl is at α-carbon while it is at β-carbon in (IV).
Question 5
1 / -0

What is the order of solubility of the following in water?

A
I< ll< III

B
Ill < II < I

C
Ill < I < II

D
II < I < III

Solution

Dihydric alcohols are always more soluble in water than monohydric alcohol. Between (I) and (II), (I) is more soluble as it forms intermolecular H-bonds with water while (II) forms intramolecular H-bonds which decreases its ability to form intermolecular H-bonds with water.
Question 6
1 / -0

Which of the following can be used for the distinction of ethanol from phenol?

A
NaHCO₃

B
Na

C
CH₃MgBr

D
NaOH

Solution

Phenol forms salt with NaOH while a liphatic alcohols do not.
Question 7
1 / -0

Consider the following reaction,
The above reaction can best be brought about by

A
Conc. H₂SO₄ / heat followed by the treatment with CH₃OH/H⁺

B
Treatment with CH₃OH/H⁺ only

C
Treatment with p-toluene sulphonic acid chloride followed by CH₃ONa/CH₃OH

D
Treatment with Na metal followed by addition of CH₃I

Solution

In the below reaction , no bond with chiral carbon is disturbed, hence, configuration is retained in product.
Question 8
1 / -0

Consider the following reaction,
The major product is

A

B

C

D

Solution

Phenolic—OH is neutralised here