PDF chapter test TRY NOW
1. Complete the missing components/variables given as 'x' and 'y' in the following reactions.Pb(NO_3)_2(aq) + 2KI(aq) → PbI_2(x) + 2KNO_3(y)
Pb(NO_3)_2(aq) + 2KI(aq) →
This is an example of and a double displacement reaction.
In the above reaction, solid lead iodide (PbI_2) precipitates are formed. Hence, x represents the solid(s) form of lead iodide, and y represents potassium nitrate's aqueous (aq) form.
2. Which among the following changes are exothermic or endothermic in nature?
Decomposition of ferrous sulphate.
2FeSO_4(s) \xrightarrow[]{Heat}
The decomposition of ferrous sulphate is an reaction because it includes heat absorption to generate ferric oxide (Fe_2O_3), sulphur dioxide (SO_2), and sulphur trioxide (SO_3).