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Question: For \({C_2}{H_2}\) on reaction with \(Na\) followed by reaction with \({C_2}{H_5}I\) gives \('X'\) ....

For C2H2{C_2}{H_2} on reaction with NaNa followed by reaction with C2H5I{C_2}{H_5}I gives ′X′'X' .The molecular formula of ′X′'X' is:
A. C2H6{C_2}{H_6}
B. C4H8{C_4}{H_8}
C. C4H6{C_4}{H_6}
D. C3H6{C_3}{H_6}

Explanation

Solution

Acetylene is the chemical compound with the formula C2H2{C_2}{H_2} . It is a hydrocarbon and the simplest alkyne. This colorless gas (lower hydrocarbons are generally gaseous in nature) is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities.

Complete step by step answer:
As an alkyne, acetylene is unsaturated because its two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with C−CC - C bond angles of 180°.
The reaction of ethyne with sodium metal in the solution produces a sodium substitution with the hydrogen atom. The reaction can be written as:
CH≡CH→NaCH≡C−NaCH \equiv CH\xrightarrow{{Na}}CH \equiv C - Na
The product of the reaction is again reacted with ethyl iodide, which produces 1-butyne as the final product of the sequence of reactions. The reaction can be represented as follows:
CH≡C−Na→C2H5ICH≡C−C2H5CH \equiv C - Na\xrightarrow{{{C_2}{H_5}I}}CH \equiv C - {C_2}{H_5}
Reactions like this are useful in yielding homologues of unsaturated hydrocarbons with long parent chains (or homologues of higher order) and also used in producing hydrocarbons at a massive level with the expenditure of cheap reactants such as ethyl iodide which is produced through ethanol in the industries.
Thus, the correct option is C. C4H6{C_4}{H_6} .

Note:
Acetylene or ethyne is widely used as a chemical building block and as a fuel. In its pure form, it is unstable and is handled as a solution. It is an unsaturated compound the two carbon atoms in it are linked together with a double bond. It is lighter when compared to air and easily ignites. Prolonged exposure to heat or fire can rupture containers violently.