Which of the following catalysts is used in the industrial preparation of methanol?
Correct answer: D. Zinc oxide and Chromium oxide
- A. Zinc oxide and alumina
- B. Alumina and silica
- C. Silica and Chromium oxide
- D. Zinc oxide and Chromium oxide
Explanation
The catalyst used in the industrial preparation of methanol is zinc oxide and chromium oxide. This mixture of catalysts is known as **the ** Raschig process. The Raschig process is a catalytic reduction of carbon monoxide to methanol. The reaction is carried out at high temperatures (573-673 K) and pressures (25-35 atm) in the presence of a catalyst. The catalyst promotes the reaction by providing a surface for the reactants to adsorb on and by lowering the activation energy of the reaction.
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About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary alcohols.
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