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Biology; Chemistry; Physics: Post your doubts here!

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wat r the catalysts that r used in cracking of hydrocarbons?specially the ones used in the apparatus where there is this tube in which there is a cotton plug soaked in hydrocarbon oil leading to a tube that hv a catalyst nd then ethene is collected abv a water tank in a test tube.
for cracking aluminium oxide or silicon oxide are used as catalysts... correct me if i'm wrong!
 
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What Catalysts are used for what processes ?

Vanadium V Oxide for Contact Process
Iron For Haber
Nickel For Hydrogenation
Esterification: Conc. H2SO4
Fermentation: Yeast ..
Hydrolysis: NaOH
And ... ?
Phosphoric Acid for the hydration of ethene
K2Cr2O7 (or any other oxidising agent) for oxidation of alcohol to carboxylic acid
Aluminium Oxide or Silicon Oxide for Craking Process
 
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