grade 11
Question 10
Gold and iron are two of many minerals mined in South Africa. Iron is mined inopen-cast mines, while gold is usually found in deep-shaft (underground) mines.During the process of refining, the following chemical reactions take place to extractthe metal from the ore: Gold is dissolved in a solution containing cyanide ions (CN–) to extract it … Read more
Annexure
ANNEXURE A ANNEXURE BQUESTION 2.1.2NAME:GRADE 11: ANNEXURE CQUESTION 4.1.7NAME:GRADE 11:
Question 10
The discovery of gold played a significant role in the economic development of SouthAfrica. In 1970 gold mining in South Africa contributed 68 per cent to global production. 10.1 Which TWO mining methods are used in South Africa? (2) 10.2 Give TWO reasons why mining is important for the South African economy. (2) 10.3 State … Read more
Question 4
4.1 The following table illustrates the weather forecast for George fromWednesday, 14 January 2015 to Tuesday, 20 January 2015. Study theweather forecast and answer the questions that follow. 4.1.1 Calculate the mean day temperature for George for the forecastedperiod. Round your final answer to the nearest temperature in °C. (4) 4.1.2 Determine the range for … Read more
Question 9
A silver Christmas tree can be made by placing copper wire, shaped in the form ofa tree, into a silver nitrate solution. The unbalanced equation for the reaction is: Cu(s) + AgNO3(aq) → Cu(NO3)2(aq) + Ag(s) 9.1 Define the term oxidation in terms of oxidation number. (2) 9.2 Write down the following for the reaction … Read more