Which of the following reagents is most suitable for converting cyclohexanol into cyclohexene?

1. Concentrated H₃PO₄

2. Concentrated HCl

3. Concentrated HCl / ZnCl₂

4. Concentrated HBr

Which of the following gases is evolved when ethyl alcohol reacts with methylmagnesium iodide (CH₃MgI)?

The alcohol expected to have the lowest pKa value among the following is :

1. Ethanol

2. 2-Fluoro ethanol

3. 2,2,2-Trifluoroethanol

4. 2-Chloroethanol

The product 'B' in the below mentioned reaction is:

1. Phenol 

2. Benzol

3. Sodium benzoate 

4. Benzal

The product in the below mentioned reaction is:

1.
2.
3.	C6H5OC6H5
4.	C2H5OC2H5

Ether is more volatile than alcohol despite having the same molecular formula. This is due to -

1. Dipolar character of ethers

2. Alcohols having resonance structures

3. Intermolecular hydrogen bonding in ethers

4. Intermolecular hydrogen bonding in alcohols

Which of the following is produced when the vapours of secondary alcohol are passed over heated copper at 573 K?

The major products C and D formed in the following reaction respectively are:
\(CH_3CH_2CH_2OC{(CH_3)}_3 \xrightarrow[\Delta]{\text{Excess}\ HI}\ C + D\)

1. ${\mathrm{}}_{}$H₃C-CH₂-CH₂-I  and I-C(CH₃)₃

2. H₃C-CH₂-CH₂-OH  and I-C(CH₃)₃

3. H₃C-CH₂-CH₂-I  and HO-C(CH₃)₃

4. H₃C-CH₂-CH₂-OH  and HO-C(CH₃)₃

The structure of intermediate A in the following reaction is:

1.		2.
3.		4.