Which of the following is a property of ionic chlorides?
Answer Details
The property of ionic chlorides is being asked in this question. Ionic chlorides are compounds formed between a metal and a non-metal where the metal donates an electron to the non-metal, resulting in the formation of ions that are held together by electrostatic forces of attraction.
Option (a) states that they can be decomposed by heat. This is true for some ionic chlorides, such as those of alkali metals, which can be decomposed into their respective metal and chlorine gas when heated.
Option (b) states that they react with aqueous AgNO3 to give a white precipitate which is soluble in excess ammonia. This is a characteristic reaction of the chloride ion, which forms a white precipitate of AgCl when reacted with AgNO3.
Option (c) states that they explode when in contact with dry ammonia. This is not a property of ionic chlorides, and in fact, most ionic chlorides are stable in contact with dry ammonia.
Option (d) states that they react with concentrated tetraoxosulphate (IV) acid to give white fumes of chlorine gas. This is another characteristic reaction of the chloride ion, which reacts with concentrated H2SO4 to give HCl gas and white fumes of SO2.
Therefore, the correct option that describes a property of ionic chlorides is (b), which states that they react with aqueous AgNO3 to give a white precipitate that is soluble in excess ammonia.