A) Wurtz reaction
B) Dehydrogenation
C) Frankland reaction
D) Catalytic hydrogenation
Correct Answer: D
Solution :
(i) Wurtz reaction: It is method of preparation of alkane by reaction between alkyl halide and sodium. \[2RX+2Na\xrightarrow{Ether}R-R+2NaX\] (ii) Dehydrogenation: It is method of formation of alkene from alkane. Hydrogen is removed from alkane during reaction. (iii) Frankland reaction: \[\underset{\begin{smallmatrix} alkyl \\ halide \end{smallmatrix}}{\mathop{R\,\,X}}\,+Zn+X\,R\to \underset{alkane}{\mathop{R-R}}\,+Zn{{X}_{2}}\] It is method of preparation of alkane from alkyl halide. (iv) Catalytic hydrogenation: It is method of preparation of alkane from alkene. Hydrogen is added during this reaction. \[C{{H}_{2}}\underset{propene}{\mathop{=CH-}}\,C{{H}_{3}}\xrightarrow[+{{H}_{2}}O]{200-{{300}^{o}}C}\] \[\underset{propene}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{3}}}}\,\]
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