Which alkyne(s) will yield 3-ethylhexane upon catalytic hydrogenation?
 

1.		2.
3.		4.	All of the above

$\mathrm{Br}-{\left({\mathrm{CH}}_2\right)}_{12}-\mathrm{C}\equiv \mathrm{CH} \stackrel{{\mathrm{NaNH}}_2}{\to } \left(\mathrm{A}\right) \underset{\mathrm{Catalyst}}{\overset{\mathrm{Lindlar}}{\to }} \left(\mathrm{B}\right)$; Product (B) is :
1.

2.  
3. 
4. Br-(CH₂)₁₂-CH=CH  

Ph - C $\equiv \mathrm{CH}\underset{\mathrm{MeOH}}{\overset{{\mathrm{MeO}}^{-}}{\to }}$ Major product of the reaction is:

(a) 

(b) 

(c) Ph - C $\equiv$C-OMe

(d) 

To carry out the above conversion, (A) and (B) respectively are:

1. NaNH₂, Cl - CH₂ーCH₂ - CH₂ - Br

2. NaNH₂, CH₂-CH₂-CH₂-Br

3. NaNH₂, l-CH₂ーCH₂-CH₂-Br

4. NaNH₂, I-CH₂-CH₂-CH₂-I

H-C$\equiv$C-Ph   Product; Product obtained in this reaction is:

1.		2.
3.	\(\mathrm{Ph}-\mathrm{C} \equiv \mathrm{C}-\mathrm{I}\)	4.	\(\mathrm{I}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H}\)

$\underset{\left(ii\right) C{H}_{3}Br}{\overset{\left(i\right) NaN{H}_2.N{H}_2}{\to }} \left(A\right) \underset{Lindiar catalyst}{\overset{H_2}{\to }} \left(B\right) ; Product \left(B\right) is :$

1.

2.

3.

4. 

A compound that gives an optically inactive compound on treatment with H₂(2 moles)/ Pt is-

1. 3-Methyl-1-pentyne

2. 4-Methyl-1-hexyne

3. 3-Methyl-1-heptyne

4. None of the above

Compound (x) will be:

(a) 

(b) 

(c) 

(d) 

Which alkyne yields butanoic acid (CH₃CH₂CH₂CO₂H) as the only organic product on treatment with ozone followed by the hydrolysis?

1. 1-Butyne             

2. 4-Octyne               

3. 1-Pentyne               

4. 2-Hexyne

The degree of unsaturation in compound (A) is -

(1) 7                       

(2) 8                       

(3) 9                             

(4) 10