The product X in the above mentioned reaction is:

1.		2.
3.		4.

1,2-dibromopropane on treatment with X moles of ${\mathrm{NaNH}}_2$ followed by treatment with ethyl bromine gave a pent-2-yne. The value of X is:

1.  1

2.  2

3.  3

4.  4

3-Phenylpropene on reaction with HBr gives (as a major product):

1. $C_6{H}_{5}CH\left(Br\right)C{H}_2-C{H}_3$

2. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{CH}\left(\mathrm{Br}\right){\mathrm{CH}}_3$

3. ${\mathrm{C}}_6{\mathrm{H}}_4\left(\mathrm{Br}\right)<mspace\; width="1em"></mspace>{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

4. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Br}$

In the following reaction,

\(\mathrm{ CH_{3}C\equiv CH\xrightarrow[Red \ hot \ iron \ tube]{873 K} \ A}\)

The number of ($\sigma$) bonds present in the product (A) is:

Arrange the following compounds in increasing order of their reactivity toward electrophilic aromatic substitution reactions.

The major product in the above-mentioned reaction is:

1.
2.
3.
4.

 
Compound A is:

1.		2.
3.		4.

The main product A and B in the above mentioned reaction are respectively- 

1. 

2. 

3. 

4. 

Which of the following alkenes will yield only ketones when treated with ozone?

1.		2.
3.		4.

Which of the following compounds will exhibit the largest heat of hydrogenation per mole of compound?

1.		2.
3.		4.