Complete the missing components/variables given as X and Y in the following.

(a) Pb(NO₃)₂ (aq)+ 2Kl(aq) Pbl₂ (X) + 2KNO₃ (Y)

(b) Cu(s)+2AgNO₃ (aq) Cu(NO₃)₂ (aq)+X(s)

(c) Zn(s) +H₂SO₄(aq)ZnSO₄ (x) + H₂(y)

(d) CaCO₃(s) CaO(s)+CO₂(g)

Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.

(a) Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773 K to form ammonia gas.

(b) Sodium hydroxide solution is treated with acetic acid to form sodium acetate and water.

(c) Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H₂SO₄.

(d) Ethane is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light.

Chemical Reactions and Equations

Write the balanced chemical equation for the following reactions and identify the type of reaction in each case.

(a) In Thermite reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.

(b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride

(c) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.

(d) Ethanol is burnt in air to form carbon dioxide, water and releases heat.

Which among the following changes are exothermic or endothermic in nature?

(a) Decomposition of ferrous sulphate

(b) Dilution of sulphuric acid

(c) Dissolution of sodium hydroxide in water

(d) Dissolution of ammonium chloride in water

Identify the reducing agent in the following reactions.

(a) 4NH₃ + 5O₂4NO+6H₂O

(b) H₂O +F₂HF + HOF

(c) Fe₂O₃ + 3CO2Fe + 3CO₂

(d) 2H₂ + O₂2H₂O