Question

Which one of the following is a trihydric alcohol containing only secondary hydroxyl groups?

• A. $ \underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C{{H}_{2}}}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C{{H}_{2}}}}\, $
• B. $ C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}} $
• C. $ C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ HO \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-OH $
• D. $ \underset{\begin{smallmatrix} | \\ HO \end{smallmatrix}}{\mathop{C{{H}_{2}}}}\,-\underset{\begin{smallmatrix} | \\ HO \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}} $

Answer 1

Answer: (B)

: $ C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\overset{2{}^\circ }{\mathop{CH}}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\overset{2{}^\circ }{\mathop{CH}}}\,-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\overset{2{}^\circ }{\mathop{CH}}}\,-C{{H}_{3}} $