Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
371–380 of 869
Question 371
2 marks · Hard
Answer and see the solution →Palladium (Pd) is found in the reactivity series between copper and hydrogen. Predict whether palladium will react with dilute sulfuric acid. Give a reason for your answer.
Question 372
1 mark · Easy
Answer and see the solution →State what forms on iron when it rusts.
Question 373
3 marks · Easy
Answer and see the solution →The picture below shows a steel fence post that has rusted at the base after several years in a damp garden.
(a)[2 marks]State two conditions necessary for rusting to occur on the steel post.
(b)[1 mark]Name one method, other than painting, which could have prevented rusting of the steel post.
Question 374
2 marks · Easy
Answer and see the solution →Explain why galvanising is able to protect iron from rusting even when the zinc coating is scratched.
Question 375
3 marks · Easy
Answer and see the solution →The table below shows the results of an experiment. Three identical iron nails were placed under different conditions for 10 days to investigate rusting.
Rusting of iron nails under different conditions. Test tube Conditions Rust formed after 10 days? 1 Air only No 2 Water only (boiled, air excluded) No 3 Air and water Yes (a)[1 mark]Which test tube shows the conditions needed for rusting?
(b)[2 marks]Explain why no rust formed in test tube 2.
Question 376
1 mark · Easy
Answer and see the solution →State one reason why coating iron with oil or grease helps prevent rusting.
Question 377
3 marks · Easy
Answer and see the solution →An iron bridge over a river is being considered for galvanising to prevent rusting.
(a)[1 mark]Describe the process of galvanising.
(b)[2 marks]State how galvanising protects the iron bridge from rusting.
Question 378
2 marks · Easy
Answer and see the solution →A steel railing has a surface area of 400 cm² and is to be protected from rusting by covering it with a thin layer of zinc (galvanising). If 0.15 g of zinc is needed to cover 100 cm², calculate the minimum mass of zinc needed to fully galvanise the railing. Give your answer to 2 decimal places.
Question 379
2 marks · Easy
Answer and see the solution →A metal sheet weighing 1.2 kg is coated by galvanising to prevent rusting. The layer of zinc adds 0.006 kg to its mass. Calculate the percentage increase in mass of the sheet after galvanising. Give your answer as a percentage to two decimal places.
Question 380
2 marks · Normal
Answer and see the solution →State the two conditions necessary for the rusting of iron.