Question

Which of the following are correct structural isomers of butane?

1. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\
   |\phantom{....}|\phantom{....}|\phantom{....}|\phantom{..}\\
   \ce{H - C - C - C - C - H}\\
   |\phantom{....}|\phantom{....}|\phantom{....}|\phantom{..}\\
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}
   \end{array}\]
2. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
   |\phantom{....}|\phantom{....}|\\
   \ce{H - C - C - C - H}\\
   |\phantom{.....}\backslash\phantom{..}|\\
   \phantom{.....}\ce{H}\phantom{.......}\ce{C - H}\\
   \phantom{.........}|\\
   \phantom{.........}\ce{H}
   \end{array}\]
3. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
   |\phantom{....}|\phantom{....}|\\
   \ce{H - C - C - C - H}\\
   |\phantom{....}\phantom{....}|\\
   \ce{H}\phantom{........}\ce{H}\\
   |\\
   \ce{H - C - H}\\
   |\\\ce{H}
   \end{array}\]
4. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\\
   |\phantom{....}|\\
   \ce{H - C - C - H}\\
   |\phantom{....}|\\
   \ce{H - C - C - H}\\
   |\phantom{....}|\\
   \ce{H}\phantom{...}\ce{H}
   \end{array}\]

विकल्प

• (i) and (iii)

• (ii) and (iv)

• (i) and (ii)

• (iii) and (iv)

Answer 1

(i) and (ii)