What products would you expect when CO is [2] i) heated with H 2 in presence of ZnO+Cu [1] ii) passed over heated caustic soda under pressure [1]

i) When carbon monoxide ( CO ) is heated with hydrogen ( H2 ) in the presence of ZnO+Cu (a catalyst), it undergoes hydrogenation to form methanol ( CH3OH ) . The balanced chemical equation is: CO + 2H2 [ZnO/Cu, heat] CH3OH ii) When carbon monoxide ( CO ) is passed over heated caustic soda ( NaOH ) under pressure, it undergoes reaction to form sodium formate ( HCOONa ) . The balanced chemical equation is: CO + NaOH [heat, pressure] HCOONa

What products would you expect when CO is [2] i) heated with H 2 in presence of ZnO+Cu… – Chemistry NEB 2076 (old course) Solution

i) When carbon monoxide ( $CO$ ) is heated with hydrogen ( $H X_{2}$ ) in the presence of $ZnO X^{+} Cu$ (a catalyst), it undergoes hydrogenation to form methanol ( $CH X_{3} OH$ ). The balanced chemical equation is:

CO+3H₂ZnO + Cu catalystHigh temperature and pressuremethanolmethanol

Hydrogenation of carbon monoxide to methanol using ZnO-Cu catalyst

$CO + 2 H X_{2} ZnO / Cu, heat CH X_{3} OH$

ii) When carbon monoxide ( $CO$ ) is passed over heated caustic soda ( $NaOH$ ) under pressure, it undergoes reaction to form sodium formate ( $HCOONa$ ). The balanced chemical equation is:

$CO + NaOH heat, pressure HCOONa$

What products would you expect when CO is [2] i) heated with H 2 in presence of ZnO+Cu [1] ii) passed over heated caustic soda under pressure [1]

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