Complete the missing components/variables given as x and y in the foll

1.	Complete the missing components/variables given as x and y in the following reactions: (a) Pb(NO3)2(aq) + 2Kl(aq) → PbI2(x) + 2KNO3(y) (b) Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + x (c) Zn(s) + H2SO4(aq) → ZnSO4(x) + H2(y) (d) CaCO3(s) CaO(s) + CO2 (g)
Answer» (a) Pb(NO₃)₂(aq) + 2Kl(aq) → PbI₂(s) + 2KNO₃(aq) Hence, x is (s) and y is (aq) (s) means PbI₂ exists in solid state and (y) means that KNO₃ exists in aqueous/liquid state. (b) Cu(s) + 2AgNO₃(aq) → Cu(NO₃)₂(aq) + 2Ag(s) Hence, x is Ag(s) In the above reaction, Ag gets replaced by Cu. (c) Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g) Hence, x is (aq) and y is (g) (aq) means copper sulphate formed exists in aqueous state. (g) Means hydrogen gas is liberating. (d) CaCO₃(s) \(\overset{heat}\longrightarrow\)CaO(s) + CO₂ (g) Hence x is heat When CaCO₃ is heated in the presence of oxygen, it forms calcium oxide (CaO) and carbon dioxide.

Complete the missing components/variables given as x and y in the following reactions: (a) Pb(NO3)2(aq) + 2Kl(aq) → PbI2(x) + 2KNO3(y) (b) Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + x (c) Zn(s) + H2SO4(aq) → ZnSO4(x) + H2(y) (d) CaCO3(s) CaO(s) + CO2 (g)

Answer»

(a) Pb(NO₃)₂(aq) + 2Kl(aq) → PbI₂(s) + 2KNO₃(aq)

Hence, x is (s) and y is (aq) (s) means PbI₂ exists in solid state and (y) means that KNO₃ exists in aqueous/liquid state.

(b) Cu(s) + 2AgNO₃(aq) → Cu(NO₃)₂(aq) + 2Ag(s)

Hence, x is Ag(s) In the above reaction, Ag gets replaced by Cu.

Hence, x is (aq) and y is (g) (aq) means copper sulphate formed exists in aqueous state. (g) Means hydrogen gas is liberating.

(d) CaCO₃(s) \(\overset{heat}\longrightarrow\)CaO(s) + CO₂ (g)

Hence x is heat

When CaCO₃ is heated in the presence of oxygen, it forms calcium oxide (CaO) and carbon dioxide.