MCQ
Which occludes hydrogen
  • A
    $Os$
  • B
    $Pt$
  • C
    $Ni$
  • All of these

Answer

Correct option: D.
All of these
d
It’s Obvious.
 

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$\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{CH \equiv C - C - OH}
\end{array}}\limits_{\rm{I}} $ $\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{C{H_2} = CH - C - OH}
\end{array}}\limits_{{\rm{II}}} $ $\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{C{H_3} - C{H_2} - C - OH}
\end{array}}\limits_{{\rm{III}}} $$\mathop {\begin{array}{*{20}{c}}
\,\,\,{C{H_3}\,\,\,\,\,\,O}\\
\,\,\,{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{C{H_3} - CH - C - OH}
\end{array}}\limits_{{\rm{IV}}} $

Match List $I$ with List $II$ :

LIST $I$

(Compound)

LIST $II$ (Uses) 
$A$ Iodoform $I$ Fire extinguisher
$B$ Carbon tetrachloride $II$ Insecticide
$C$ $CFC$ $III$ Antiseptic
$D$ $DDT$ $IV$ Refrigerants

Choose the correct answer from the options given below :

In a hydrogen -oxygen fuel cell, combustion of hydrogen occurs to