Which of the following do not impart a characteristic colour to the flame?

CHEMISTRY · Multi correct · GCSE · Chemistry · Chemical Analysis · Chemical Analysis

Problem

Which of the following do not impart a characteristic colour to the flame? (1) MgSO4\mathrm{MgSO}_4 (2) CaCl2\mathrm{CaCl}_2 (3) Sr(NO3)2\mathrm{Sr}(\mathrm{NO}_3)_2 (4) BeCl2\mathrm{BeCl}_2

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