Question

.Name the following types of reactions: i) AgNO3 +NaCl AgCl +NaNO3 ii) CaO + H2O Ca(OH)2 + Heat iii) 2KClO 2KCl+ 3O2 iv) CuO +H2 Cu+ H2O v) 2Mg+O2 2MgO vi) 2H2O2 2H2O+ O​

Answer 1

Explanation:

: This is a double displacement reaction where the two reactants react and exchange their ions to form new compounds. A solid precipitate of silver chloride along with aqueous sodium nitrate, both of which together gives a milky white suspension. The general format is: AB + CD ⇢AD + CB. Since a precipitate is formed, it is also called a precipitation reaction.

: This is an “exothermic combination reaction” where calcium oxide reacts with “water to form calcium hydroxide” or slaked lime. When calcium hydroxide is formed a ‘hissing sound’ is produced because of the heat released and hence is exothermic.

: This is a decomposition reaction where potassium chlorate upon heating undergoes “thermal decomposition reaction” to form the potassium chloride with the ‘release of oxygen’.

: This is a displacement and a redox reaction where zinc displaces the copper in copper sulphate to form zinc sulphate and copper. Since copper gets reduced and zinc gets oxidized, it is also a redox reaction.