Write a balanced chemical equation :
FeSO4(s) + heat→ Fe2O3(s) + SO2(g) + SO3(g)
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The standard heat of formation of Fe2O3 (s) is 824.2kJ mol^-1 . Calculate heat change for the reaction. 4Fe(s) + 302 (g) → 2Fe2O3(s)
∆rH = 2x 824.2 = 1648.4kJ/mol.
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In a vessel containing SO2, SO3 and O2 at equilibrium some helium gas is introduce so
(c) Remains unaltered
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Write the balanced chemical equation of the reaction between sodium hydroxide and hydrochloric acid
Balanced chemical equation of the reaction between Sodium hydroxide and Hydrochloric acid is given by: Acid + base → water + salt NaOH(aq)+HCl(aq)→NaCl(aq)+H2O(l)
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Identify the type of each of the following reactions. Also write balanced chemical equation for each.
(i) Exothermic Reaction CaO + H2O → Ca(OH)2 (ii) Double displacement reaction. BaCl2+Na2SO4 → BaSO4+2NaCl
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Write the balanced chemical equation for the following reaction and identify the type of reaction and define it
Fe2O3+2Al → Al2O3+2Fe. Displacement reaction is the reaction in which one element displaces another element.
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Write balanced equation for the following reactions and also name the type of chemical reaction in each case :
(i) ZMg+ O2 → 2MgO MgO + H2O → Mg(OH)2 Oxidation reaction/Combination reaction (ii) CaCO3(s)→ CaO(s) + CO2(g) CaCO3(s)-(Lime stone) CaO(s) -(quick lime) Decomposition reaction
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Write balanced chemical equations only for the following chemical properties of acids : (a) When an acid reacts with a metal.
(a) Zn + H2SO4 → ZnSO4+H2 (b) HCl+NaHCO3 → NaCl + H2O + CO2 (c) HCl+NaOH → NaCl + H2O
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What is the colour of FeSO4.7H2O crystals ? How does this colour change upon heating ? Give balanced chemical equation for the changes.
FeSO4.7H2O is green in colour and loses water of crystallisation when it is heated. It is then decomposed to Fe3O, (brown coloured), SO2 and SO3 FeSO4.7H2O + Heat→ FeSO4 + 7H2O 2FeSO4 (s)+Heat → FeSO4 +SO2(g) +SO3(g)
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Write the chemical formula of bleaching powder. Write balanced chemical equation involved in the preparation
Chemical formula -CaOCl2 Chemical equation - Ca(OH)2+Cl2 →CaOCl2+H2O Uses: (i) For bleaching cotton and linen in the textile industry (ii) As an oxidising agent in a chemical industry. (iii) For disinfecting water.
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Sulphurous anhydride is : (a) SO2 (b) SO3 (c) HSO3 (d) SO^23
Correct Option (a) SO2 Explanation : SO2 is anhydride of H2SO3
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