Chemistry
The metal oxide which can react with acid as well as alkali is :
- Silver oxide
- Copper [II] oxide
- Aluminium oxide
- Calcium oxide
Related Questions
Brass is an alloy of :
- Copper and tin
- Copper and zinc
- Zinc and lead
- Lead and tin
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(i) What is the substance of which the electrodes A and B are made?
(ii) At which electrode (A or B) is the aluminium formed ?
(iii) What are the two aluminium compounds in the electrolyte C ?
(iv) Why is it necessary for electrode B to be continuously replaced ?
Correct the following statement — Haematite is the chief ore of aluminium.
The sketch illustrates refining of aluminium by Hoope's process. [reference]
(i) Which of A and B is the cathode and which one is the anode?
(ii) What is the electrolyte in the tank?
(iii) What material is used for the cathode?