A-LevelChemistryGroup 29701/12 · May/June 2012 · Q171 Mark

What can be seen when a piece of magnesium ribbon is placed in cold water?

Avigorous effervescence occurs.

BBubbles of gas form slowly on the magnesium.

CThe magnesium floats on the surface of the water and reacts quickly.

DThe magnesium glows and a white solid is produced.

✓ Correct answer

B: Bubbles of gas form slowly on the magnesium.

Oracle Prep sorts past-paper questions by topic, so you can drill Group 2 and see which topics are most likely to come up next.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

River water in a chalky agricultural area contains Ca²⁺, Mg²⁺, CO₃²⁻, HCO₃⁻, Cl⁻ and NO₃⁻ ions. In a water treatment …

A sample containing 0.40 mol of calcium nitrate was decomposed by heating in a roaring Bunsen burner flame until ther…

Why does barium react more rapidly with cold water than magnesium does?

The main stage in the Contact process is an equilibrium reaction. 2SO2 + O2 ⇌ 2SO3 Which row describes the effect of …

X and Y are oxides of different Period 3 elements. If one mole of X is added to water, the solution formed is neutral…

Hot aqueous sodium hydroxide reacts with chlorine. 6NaOH(aq) + 3Cl2(g) → 5NaCl(aq) + NaClO3(aq) + 3H2O(l) Which state…