Fig. 7.1 shows some clean iron nails placed in four test-tubes, $$$\mathbf{M}, \mathbf{N}, \mathbf{O}$$$ and $$$\mathbf{P}$$$, under different conditions. Fig. 7.1 (i) State in which test-tube, $$$\mathbf{M}, \mathbf{N}, \mathbf{O}$$$ or $$$\mathbf{P}$$$, the iron nail is most likely to rust. ................................................................................................................................... (ii) Choose from the list the compound in rust. Tick $$$(\checkmark)$$$ one box.

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_qp_32 Year：2024 Question No：7(b)

Answer:

Knowledge points:

9.1.1.1. thermal conductivity

9.1.1.2. electrical conductivity

9.1.1.3. malleability and ductility

9.1.1.4. melting points and boiling points

9.1.2.1. dilute acids

9.1.2.2. cold water and steam

9.1.2.3. oxygen

9.4.1. State the order of the reactivity series as: potassium, sodium, calcium, magnesium, aluminium, carbon, zinc, iron, hydrogen, copper, silver, gold

9.4.2.1. potassium, sodium and calcium with cold water

9.4.2.2. magnesium with steam

9.4.2.3. magnesium, zinc, iron, copper, silver and gold with dilute hydrochloric acid and explain these reactions in terms of the position of the metals in the reactivity series

9.4.3. Deduce an order of reactivity from a given set of experimental results

9.4.4. Describe the relative reactivities of metals in terms of their tendency to form positive ions, by displacement reactions, if any, with the aqueous ions of magnesium, zinc, iron, copper and silver

9.4.5. Explain the apparent unreactivity of aluminium in terms of its oxide layer

Answer:

Knowledge points:

Solution:

Related Question