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ICSE Class X Sample / Model Paper 2024 : Chemistry : Hydrogen Chloride

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Hydrogen Chloride 1. How will you convert iron to iron (II) chloride? Support your answer by a chemical equation. 2. Explain the term constant boiling mixture. 3. State why cannot be dilute hydrochloric acid concentrated beyond certain concentration on boiling. 4. Write an ionic equation when HCl gas dissolves in water. 5. Name an ion responsible for acidic nature of HCl acid. 6. State which of the two a solution of HCl in water and a solution of HCl in toluene is an electrolyte. Give reasons for your answer. 7. 8. How will you obtain following from dil HCl acid? Give equations. (a) Hydrogen (b) carbon dioxide (c) Sulphur dioxide (d) hydrogen sulphide Name two soluble nitrates which can be converted into insoluble chlorides by the use of dilute HCl. Support your answer by chemical equations. 9. How does silver nitrate solution react with sodium chloride solution? State your observations when above mixture is treated with excess of ammonium hydroxide. Support your answer by chemical equations. 10. The statements given below pertain to HCl gas or HCl acid. Complete the statements with appropriate words. [1 mark of each blank space] (i) Hydrogen chloride gas is not dried by using [conc H2SO4/P2O5]. (ii) Addition of [sodium nitrate/zinc nitrate/silver nitrate] to hydrochloric acid, gives an insoluble ppt. of the respective chloride. This ppt. is [soluble/insoluble] in ammonium hydroxide and [soluble/insoluble] in dilute nitric acid. (iii) Hydrogen chloride gas on heating above 500 C gives hydrogen and chlorine gas. This reaction is an example of [thermal decomposition/thermal dissociation]. (iv) Addition of [iron (III) sulphide/iron (II) sulphide/iron pyrites] to dilute hydrochloric acid results in the liberation of hydrogen sulphide gas. (v) Iron reacts with hydrogen chloride gas forming [iron (II) chloride/iron (III) chloride] and hydrogen gas. The reaction is an example of [double decomposition /synthesis /simple displacement]. (vi) Hydrochloric acid can be converted into chlorine by heating it with [calcium oxide/lead (II) oxide], which acts as a/an [oxidising/reducing] agent. (vii) Hydrogen chloride and water are examples of [polar covalent/nonpolar covalent] compounds and the solution of hydrogen chloride in water [contains/does not contain] free ions. (viii) An aqueous solution of HCl gas is named [aquafortis/oil of vitriol/muriatic acid]. Head Office: 106-107-108 Lake Homes Shopping Complex, Chandivali IRB Road, Mumbai 400076 T.: 022 4120 3067 E.: info@speedlabs.in Page | 1

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