C9

Marking Scheme: Metals This is the marking scheme for quiz: Metals Section 1: Core Syllabus Question 1 Good conductor of heat [1] Good conductor of electricity [1] Malleable / Ductile / High melting point / Lustrous (Any one) [1] Question 2 A list of metals [1] Arranged in order of their reactivity/decreasing reactivity [1] Question 3 (a) Bright white light / intense white flame [1] (b) $2Mg(s) + O_2(g) \rightarrow 2MgO(s)$ [2] (1 for correct formula, 1 for balancing) ...

Chemistry Quiz: Metals Question 1 List three general physical properties of metals. [3] Question 2 Define the term ‘reactivity series’. [2] Question 3 When magnesium is heated in air, it reacts with oxygen. State the observation during this reaction. [1] Write a balanced symbol equation for this reaction. [2] Question 4 Explain why aluminum is extracted by electrolysis rather than by reduction with carbon. [2] Question 5 Steel is an alloy of iron and carbon. Explain why steel is harder than pure iron. [2] ...