chlorine gas is passed in an aqueous solution and give molten iron and aluminium oxide write balanced chemical equation
Answers
Answer:
Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773K to form ammonia gas.
Answer: N2 + 3H2 + Catalyst/773 K ⇨ 2NH3
Sodium hydroxide solution is treated with acetic acid to form sodium acetate and water.
Answer: NaOH + CH3COOH ⇨ CH3COONa + H2O
Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H2SO4 .
Answer: C2H5OH + CH3COOH ⇨ CH3COOC2H5 + H2O
Ethene is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light.
Answer: C2H4 + 3O2 ⇨ 2CO2 + 2H2O + Heat + Light
(a) and (c) are combination reactions, (b) is double displacement reaction and (d) is redox reaction.
Short Answer Questions from Exemplar Problems
Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
Thermit reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.
Answer: Fe2O3 + 2Al ⇨ 2Fe + Al2O3 + Heat + Light
Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.
Answer: 3MgS + N2 ⇨ 2Mg3N2
Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
Answer: 2KI + Cl2 ⇨ 2KCl + I2
Ethanol is burnt in air to form carbon dioxide, water and releases heat.
Answer: C2H5OH + 3O2 ⇨ 2CO2 + 3H2O + Heat
Complete the missing components/variables given as '?' in the following reactions
Pb(NO3 )2 (aq) + 2KI (aq) ⇨ PbI2 (?) + 2KNO3 (?)
Answer: Pb(NO3 )2 (aq) + 2KI (aq) ⇨ PbI2 (s) + 2KNO3 (a)
Cu (s) + 2AgNO3 (aq) ⇨ Cu(NO3 )2 + ? (?)
Answer: Cu (s) + 2AgNO3 (aq) ⇨ Cu(NO3 )2 + Ag (s)
Zn (s) + H2SO4 (aq) ⇨ ZnSO4 (?) + H2 (?)
Answer: Zn (s) + H2SO4 (aq) ⇨ ZnSO4 (aq) + H2 (g)
CaCO3 + ? ⇨ CaO (s) + CO2 (g)
Answer: CaCO3 + Heat ⇨ CaO (s) + CO2 (g)
Which among the following changes are exothermic or endothermic in nature?
Decomposition of ferrous sulphate
Dilution of sulphuric acid
Dissolution of sodium hydroxide in water
Dissolution of ammonium chloride in water
Answer: (a) and (d) are endothermic, while (b) and (c) are exothermic
Identify the reducing agent in the following reactions
4NH3 + 5O2 ⇨ 4NO + 6H2O
Answer: NH3
H2O + F2 ⇨ HF + HOF
Answer: F2
Fe2O3 + 3CO ⇨ 2Fe + 3CO2
Answer: CO
2H2 + O2 ⇨ 2H2O
Answer: H2