When neopentyl alcohol is heated with an acid, it slowly converted into an 85 : 15 mixture of alkenes A and B, respectively. What are these alkenes ?

1.
2.
3.
4.	and

The major product [B] in the following reaction is: 

  

1.		2.
3.		4.

The major product of the following reaction is - 

1. 
2. 
3. 
4. 

What is the major product formed in the following reaction?
  

1.
2.
3.
4.

In the following sequence of reactions,  

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}<mspace\; width="1em"></mspace>\stackrel{<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{P}+{\mathrm{I}}_2<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>}{\to }<mspace\; width="1em"></mspace>\mathrm{A}\underset{\mathrm{ether}}{\overset{\mathrm{Mg}}{\to }}\mathrm{B}\stackrel{\mathrm{HCHO}}{\to }\mathrm{C}\stackrel{<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>{\mathrm{H}}_2\mathrm{O}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>}{\to }\mathrm{D},$ then
compound 'D' is:

1. Butanal

2. n-Butyl alcohol

3. n-Propyl alcohol

4. Propanal

Among the following identify the compounds which can be dehydrated very easily:

1.	CH3CH2CH2CH2CH2OH
2.
3.
4.