Physical Properties of Alcohols and Phenols

Q. Phenol is a weaker acid than acetic acid because

1. Phenoxide ion is better stabilized by resonance than acetate ion.
2. Acetate ion is better stabilized by resonance than phenoxide ion.
3. Phenol is less solute in water than acetic acid.
4. Both phenoxide ion and acetate ion are stable.

Q.

Why Ethanol is soluble in water?

Q. Ortho-nitrophenol is steam volatile whereas para-nitrophenol is not. This is due to
$1.$Intramolecular hydrogen bonding present in ortho-nitrophenol
$2.$Intermolecular hydrogen bonding present in para-nitrophenol
$3.$Intramolecular hydrogen bonding present in para-nitrophenol
$4.$Inter-molecular hydrogen bonding present in ortho-nitrophenol.

1. 1&3
2. 1&2
3. 2 only
4. 1, 3 &4

Q.

Out of o - nitrophenol and p - nitrophenol, which is more volatile? Explain.

Q. The compound which reacts fastest with Lucas reagent at room temperature is:
[1 mark]

1. butan-2-ol
2. butan-1-ol
3. 2-methylpropan-1-ol
4. 2-methylpropan-2-ol

Q.

The halides in which the halogen atom is bonded to an sp² hybridised carbon of a carbon-carbon double bond are:

1. Vinylic halides

2. Allylic halides

3. Benzyllic halides

4. Aryl halides

Q.

Why alcohol and glucose do not conduct electricity? Explain in detail.

Q.

which has higest aromatic character

1. pyrol

2. furane

3. thiophene

Q.

The dipole moment of phenol is smaller than that of methanol. Why?

Q.

Explain why propanol has a higher boiling point than that butane?

Q.

Why is the carbon in carbonium ion sp2 hybridised?

Q.

Does phenol react with ${\mathrm{NaHCO}}_3$?

Q.

Why basicity of ${\mathrm{H}}_3{\mathrm{PO}}_3$ and ${\mathrm{H}}_3{\mathrm{PO}}_2$ are $2$ and $1$ respectively?

Q.

Why is order of boiling point of alcohols is 3°>2°>1° ?

Q.

Why is acetone soluble in oil and water?

Q. Why is the lone pair on nitrogen in pyridine is not part of the aromatic ring but in pyrrole ring it is

Q.

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Q.

The decreasing order of boiling points of the following alcohols

1. $3-\mathrm{methylbutan}-2-\mathrm{ol}>2-\mathrm{methylbutan}-2-\mathrm{ol}>\mathrm{pentan}-1-\mathrm{ol}$

2. $\mathrm{pentan}-1-\mathrm{ol}>3-\mathrm{methylbutan}-2-\mathrm{ol}>2-\mathrm{methylbutan}-2-\mathrm{ol}$

3. $2-\mathrm{methylbutan}-2-\mathrm{ol}>3-\mathrm{methylbutan}-2-\mathrm{ol}>\mathrm{pentan}-1-\mathrm{ol}$

4. $2-\mathrm{methylbutan}-2-\mathrm{ol}>\mathrm{pentan}-1-\mathrm{ol}>3-\mathrm{methylbutan}-2-\mathrm{ol}$

Q.

The carbon-oxygen bond in phenol is slightly stronger than that in methanol. Why ?

Q. Which is the best reaction for preparation of t-butyl ethyl ether ?

1. 
2. 
3. 
4. 

Q.

In which one of the following keto-enol system is the keto form more stable than the enol form?

1. $C{H}_3-C{H}_2-\stackrel{O}{\stackrel{||}{C}}-C{H}_3\rightleftharpoons C{H}_3-C{H}_2-\stackrel{OH}{\stackrel{|}{C}}=C{H}_2$

2. 

3. 

4. 

Q. Write the type of hybridisation of each of the carbon atom in the following structures: (i) ch2=c=ch2 (ii) ch3-ch=ch-ch3

Q. How to find if one organic compound is acid sensitive or basic sensitive while comparing the clemmensen reduction and wolff kishner reduction?

Q. the freezing point of a solution of 2.40g of biphenyl in 75g of benzene is 4.40^° C .the normal freezing point of benzene is 5.50^° C. what is the molal freezing point cons†an t (^° C/m) fod benzene

Q.

Arrange the following compounds in increasing order of boiling point. Propan - 1 - ol, butan - 1 - ol, butan - 2 - ol, pentan - 1 - ol
(a) Propan-1-ol, butan-2-ol, butan - 1 - ol, pentan-1-o|
(b) Propan-1-ol, butan - 1 - ol, butan-2-ol, pentan-1-ol
(c) Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol
(d) Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol

Q. The compound that is most difficult to protonate is:

1. 
2. 
3. 
4. 

Q. Which of the following is purified by vacuum distillation?

1. Glycerine
2. Glycerol
3. Propane$-1,2,3-$triol
4. Ethanol

Q. what reacts with Ag2O to give ethanol and di ethyl ether. And what should be the conditions for Ag2O for these reactions

Q. Which of the following gem diols is stable:

$\left(a\right)H_{3}C-\stackrel{OH}{\stackrel{|}{\underset{O{H}_3}{\underset{|}{C}}}}-H\left(b\right)B{r}_{3}C-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-H$
$\left(c\right)F_{3}C-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-H\left(d\right)H_5{C}_6-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-C_6{H}_5$

1. a
2. c
3. d
4. b

Q. What is wrong about enantiomers of 2-chloropropanoic acid?

1. Have same solubility in water
2. Have same boiling point
3. Have same refractive indices
4. Have same magnitude of angle of rotation of plane polarised light and direction