Chemistry · Oct / Nov 2024 · Paper 11 · Question 22

When heated, copper(II) sulfate crystals, CuSO4•5H2O, react as shown. CuSO4•5H2O(s) → CuSO4(s) + 5H2O(g) When ......1...... copper(II) sulfate, which is ......2...... in appearance, is heated, it forms ......3...... copper(II) sulfate, which is ......4...... in appearance. Which words correctly complete gaps 1, 2, 3 and 4?

1. Aanhydrous | blue and crystalline | hydrated | white and powdery
2. Bhydrated | colourless and crystalline | anhydrous | blue and powdery
3. Chydrated | blue and powdery | anhydrous | colourless and crystalline
4. Dhydrated | blue and crystalline | anhydrous | white and powdery

As printed in the paper