A Level Chemistry 9701/12/O/N/20 Q17


Which statement about Group 17 elements and their compounds is correct?
A Chlorine reacts with cold concentrated sodium hydroxide to form NaCl and NaClO3.
B HCl is more thermally stable than HBr because chlorine is less electronegative than bromine.
C Iodide ions are oxidised to iodine by concentrated sulfuric acid.
D Silver iodide is soluble in dilute aqueous ammonia.

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