Commercially,methanol is prepared by:
- AReduction of $CO$ in the presence of $ZnO-Cr_2O_3$
- BMethane reacting with water vapours at $900 \ ^\circ C$ in the presence of $Ni$ catalyst
- CReduction of $HCHO$ by $LiAlH_4$
- DReduction of $HCHO$ by aqueous $NaOH$
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Fire extinguishers contain $H_2SO_4$ and
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List-$I$ Type of Hydride List-$II$ Example $A$. Electron deficient hydride $I$. $MgH_2$ $B$. Electron rich hydride $II$. $HF$ $C$. Electron precise hydride $III$. $B_2H_6$ $D$. Saline hydride $IV$. $CH_4$
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| List-$I$ Type of Hydride | List-$II$ Example |
| $A$. Electron deficient hydride | $I$. $MgH_2$ |
| $B$. Electron rich hydride | $II$. $HF$ |
| $C$. Electron precise hydride | $III$. $B_2H_6$ |
| $D$. Saline hydride | $IV$. $CH_4$ |
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