The conversion of atomic hydrogen into ordinary hydrogen is:

  • A
    Exothermic change
  • B
    Endothermic change
  • C
    Nuclear change
  • D
    Photochemical change

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Similar Questions

The correct order of boiling point of $H_2$,$HD$,$D_2$ and $T_2$ would be

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Match the following:
List-$I$List-$II$
$A$. Electron-deficient hydride$I$. $CH_4$
$B$. Electron-precise hydride$II$. $B_2H_6$
$C$. Electron-rich hydride$III$. $CaH_2$
$D$. Saline hydride$IV$. $NiH_{0.6}$
$V$. $PH_3$

What happens when concentrated $H_2SO_4$ reacts with sugar?

What is $X$ in the following reaction?
$NaH + B_2H_6 \xrightarrow{\text{Diethyl ether}} X$

Which compound is formed on catalytic hydrogenation of carbon monoxide at high $p$ and high $T$ in the presence of $ZnO-Cr_2O_3$ catalyst?

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