4.1. Electrolysis
A subsection of Chemistry, 0620, through 4. Electrochemistry
Listing 10 of 449 questions
Some substances conduct electricity, others do not. Which three of the following conduct electricity? Tick three boxes. aqueous sodium chloride ceramics copper graphite sodium chloride crystals sulfur State the name given to a substance, such as plastic, which does not conduct electricity. Molten zinc chloride was electrolysed using the apparatus shown below. + – positive electrode negative electrode molten zinc chloride Choose a word from the list below which describes the positive electrode. Put a ring around the correct answer. anion anode cathode cation State the name of the product formed during this electrolysis at the negative electrode, . the positive electrode. Suggest the name of a non-metal which can be used for the electrodes in this electrolysis.
0620_s10_qp_21
THEORY
2010
Paper 2, Variant 1
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Concentrated hydrochloric acid can be electrolysed using the apparatus shown. concentrated hydrochloric acid – + negative electrode positive electrode What do you understand by the term electrolysis ? What is the name given to the positive electrode? Put a ring around the correct answer. anion anode cathode cation electrolyte State the name of the gas given off at the negative electrode. Complete the following sentence about electrolysis using words from the list. inert magnesium platinum reactive solid Electrodes made of graphite or are generally used in electrolysis because they are . When concentrated hydrochloric acid is electrolysed, chlorine is released at the positive electrode. Draw the arrangement of the electrons in an atom of chlorine. Draw the electronic structure of a chlorine molecule. Show only the outer electron shells. Describe a test for chlorine. test result Hydrochloric acid reacts with the base calcium hydroxide. Complete the word equation for this reaction. hydrochloric acid + calcium hydroxide → + Hydrochloric acid also reacts with zinc. Complete the symbol equation for this reaction. Zn + HCl → ZnCl 2 +
0620_s11_qp_21
THEORY
2011
Paper 2, Variant 1
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Questions Discovered
449