Chemistry
Name the following:
(i) The process of coating of iron with zinc.
(ii) An alloy of lead and tin that is used in electrical circuits.
(iii) An ore of zinc containing its sulphide.
(iv) A metal oxide that can be reduced by hydrogen.
Related Questions
Give a balanced chemical equation for each of the following –
(i) Preparation of ethane from sodium propionate.
(ii) Action of alcoholic KOH on bromoethane.
Answer the following questions with respect to the electrolytic process – in the extraction of aluminium.
(i) Identify the components of the electrolyte other than pure alumina and the role played by each.
(ii) Explain why powdered coke is sprinkled over the electrolytic mixture.
Complete the following by selecting the correct option from the choices given:
(i) The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is …………… (Al/Cu/Zn/Fe)
(ii) The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction …………… (Fe/Mg/Pb/Al)
(iii) The divalent metal whose oxide is reduced to metal by electrolysis of its fused salt is …………… (Al/Na/Mg/K)