Iron pipes corrode rapidly when exposed to sea water. Which metal, when attached to the iron, would not offer protection against corrosion?

5070_s06_qp_1

MCQ

2006

Paper 1, Variant 0

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Four test-tubes were set up as shown...

5070_s08_qp_1

MCQ

2008

Paper 1, Variant 0

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The steel bodies of cars can be protected from rusting by spraying them with zinc. Why is zinc used?

5070_s09_qp_1

MCQ

2009

Paper 1, Variant 0

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The diagram shows how an underwater iron pipe can be protected from rusting. metal Z iron pipe water Metal Z can be 1 because it is 2 reactive than iron. Which words correctly complete gaps 1 and 2?

5070_s15_qp_11

MCQ

2015

Paper 1, Variant 1

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Iron(oxide can be reduced to iron by carbon. Which other element can reduce iron(oxide to iron?

5070_s15_qp_11

MCQ

2015

Paper 1, Variant 1

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Two pieces of iron, one with zinc attached and the other with copper attached, are placed separately in water as shown...

5070_s15_qp_12

MCQ

2015

Paper 1, Variant 2

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Which element, if attached to iron immersed in salt water, would prevent the iron from corroding?

5070_s16_qp_12

MCQ

2016

Paper 1, Variant 2

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Which diagram correctly shows the conditions necessary for the rusting of iron and also the metal that can be used to prevent rusting by sacrificial protection?

5070_s20_qp_11

MCQ

2020

Paper 1, Variant 1

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Which diagram correctly shows the conditions necessary for the rusting of iron and also the metal that can be used to prevent rusting by sacrificial protection?

5070_s20_qp_12

MCQ

2020

Paper 1, Variant 2

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Attaching pieces of magnesium to underground iron pipes can protect the iron from corrosion. Which reaction protects the iron from corrosion?

5070_s21_qp_11

MCQ

2021

Paper 1, Variant 1

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