Physical Properties of Alcohols and Phenols

Q.

The hybridization state of Carbon in diamond is:

1. sp²

2. sp³

3. sp

4. None of these

Q. For the Reaction PCl5(g) ⇌ PCl3(g) + Cl2(g) at 400K & 1atm, degree of dissociation of PCl is 0.4. Calculate the vapour density of equilibrium mixture under given condition? ( ) (1) 60.80 (2) 50.10 (3) 74.28 (4) 98.12

Q.

How are essential oils purified?

1. By chromatography

2. By condensation

3. By evaporation

4. By steam distillation

Q.

Which of the following is known as oil of winter green?

1. Methyl Salicylate

2. Propyl salicylate

3. Ethyl Salicylate

4. Phenyl Salicylate

Q. What is protonated alcohol

Q. Explain the aromaticity of 1, 4 Oxazine and Pyridine. Why does the lone pair on Nitrogen not participate in resonance in Pyridine?

Q. 33 The number of carbon atoms and degree of unsaturation in allyl vinyl acetylene is? And how

Q.

The process of separation of solid organic compounds is known as:

1. Distillation

2. Crystallisation

3. Differential extraction

4. Sublimation

Q. p-Nitrophenol is more steam volatile than o-nitrophenol.

1. True
2. False

Q. Discuss the principle behind Differential Extraction technique giving an example.

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. $b$
3. $c$
4. $d$

Q.

Which of the following statements is correct regarding case of dehydration in alcohols [CPMT 1980, 85; MP PMT 2001; BHU 2002]

1. Primary > Secondary

2. Secondary > Tertiary

3. Tertiary > Primary

4. None of these

Q.

The most suitable method of the separation of a 1 : 1 mixture of ortho and para nitrophenols is [CBSE PMT 1994, 99; CPMT 1997]

1. Distillation

2. Sublimation

3. Crystallization

4. Chromatography