Elements of which of the following group$(s)$ of the periodic table do not form hydrides?
- AGroups $7, 8, 9$
- BGroup $13$
- CGroups $15, 16, 17$
- DGroup $14$
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What is $X$ in the following reaction?
$CO + 2 H_2 \xrightarrow{X} CH_3 OH$
$CO + 2 H_2 \xrightarrow{X} CH_3 OH$
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$(1)$ In the crystal structure of ice, the oxygen atom is at a distance of $276 \ pm$ from four hydrogen atoms.
$(2)$ The relative proportion of tritium to protium is $1: 10^{18}$.
$(1)$ In the crystal structure of ice, the oxygen atom is at a distance of $276 \ pm$ from four hydrogen atoms.
$(2)$ The relative proportion of tritium to protium is $1: 10^{18}$.
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