It can be purified by electrolysis using a method which is similar to the purification of copper. Under the conditions used in the process, z is the product at the negative electrode (cathode). Complete the following description of this purification. The electrolyte is aqueous [1] The negative...
(London Examinations) GCSE Chemistry Specification. HOW TO GET THE MOST FROM THIS BOOK PRINCIPLES OF CHEMISTRY Atoms; Atomic structure; Relative molecular and formula masses; Chemical formulae and chemical equations; Ionic compounds; Covalent substances; Electrolysis; Metallic crystals CHEMISTRY OF THE ...
overhead cables electrodes A aluminium copper B aluminium platinum C copper platinum D platinum aluminium 10 Which statement about the electrolysis of molten lead(II) bromide is correct? A A colourless gas is seen at the cathode. B A grey metal is seen at the anode. C A red / brown gas...
2013年IGCSE化学考试真题11
Th e main although the fi gure for nuclear energy has fallen in method of obtaining it on a large scale is by the electrolysis this time. In 2011, only 1.6% of energy came from of water. However, this is not very economical. It is possible solar power, wind power and wave power ...
There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully....
IGCSE物理真题
化学IGCSE试卷
There are forty questions on this paper. Answer all questions. For each question there are four possibl e answers A , B , C and D .Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet ...