Which metal is used for roofing and corrodes to a dull green solid? [9f-1] Which metal is used for roofing and corrodes to form a dull white solid? [9f-2] Which metal is used for structural purposes and corrodes to a dull orange-brown solid? [9f-3] Which metal is used for tableware and old examples of it show patches of black corrosion? [9f-4]
Which metal shows little or no corrosion even after thousands of years? [9f-5]
Which metal shows rapid corrosion even after a few days? [9f-6] What must iron be in contact with before it rusts? [9f-7]
Freshly cut soft potassium rapidly tarnishes (dull effect). Which substance is the potassium most likely to be reacting with? [9f-8][9f-9] Some metals react with cold water and fizzing is observed. Other less reactive metals react when heated in steam. Complete the word equation: metal + cold water ==> ?[9f-10] Some metals react with cold water and fizzing is observed. Other less reactive metals react when heated in steam. Complete the word equation: hot metal + steam ==> ?When added to cold water, which metal slowly produces just a few bubbles when it reacts? [9f-11]When added to cold water, which metal shows no reaction with water after a few hours and can be used for roofing? [9f-12]When added to cold water, which metal produces lots of bubbles rapidly? [9f-13]
[9f-14] Complete the word equation: calcium + water ==> ?[9f-15] Complete the word equation: magnesium + sulphuric acid ===> ?[9f-16] Complete the word equation: calcium + hydrochloric acid ===> ?Which metal reacts VERY slowly with hydrochloric acid over a few days to form a pale blue-green solution? [9f-17]Which metal rapidly reacts with hydrochloric acid to form a colourless gas and a clear colourless solution? [9f-18]Which metal is likely to react explosively with hydrochloric acid? [9f-19]Which metal reacts moderately fast with hydrochloric acid to give a colourless gas and a pale green solution? [9f-20]
Strips or strands of the following metals were heated strongly in a bunsen flame. Which burns with a bright white flame? [9f-21]Strips or strands of the folowing metals were heated strongly in a bunsen flame. Which gives blue or green colours to the flame and becomes coated in a black solid? [9f-22]Strips or strands of the folowing metals were heated strongly in a bunsen flame. Which gives an orange flame, sparks and forms a dark grey solid? [9f-23]Strips or strands of the folowing metals were heated strongly in a bunsen flame. Which melts, glows red and forms a white solid (pale yellow hot)? [9f-24]
Why is tin used to coat steel cans? [9f-25]