Which of the following pairs of substances contains one substance that is soluble in water and one that is insoluble in water? Put a cross (X) in the box next to your answer - Edexcel - GCSE Chemistry - Question 4 - 2014 - Paper 1

Barium chloride exhibits strong ionic bonds due to the electrostatic attraction between the positively charged barium ions (Ba²⁺) and the negatively charged chloride ions (Cl⁻). To separate the ions, a significant amount of heat or energy is required, resulting in a high melting point.