The covalent compound ionises in water because of its polar nature and it can conduct electricity. (iii) Why an empty flask is used. Below 200°C; B. (e) Hydrogen chloride gas is highly soluble in water. What is the common property being shown by these metal oxides? (iii) An empty flask is used to prevent back suction. It is also very dangerous to handle sodium metal. Sulphuric acid. Give three distinct tests (apart from using an indicator) you would carry out with solution of HClto illustrate the typical properties of an acid. (c) A solution of HCl in water gives hydronium ions and conducts electricity, but HCl is also soluble in dry toluene, but in that case it neither (i) turns blue litmus red (ii) nor does conducts electricity. (b) Write the equation for the reaction of concentrated hydrochloric add with Pb3O4. When passed into lime water, forms a milky white precipitate of calcium carbonate. Why? Question 7: (i) When moist chlorine reacts with hydrogen sulphide, two products are formed : (a) A gas which fumes in moist air; and (b) A yellow solid. (ii)  When concentrated hydrochloric acid is made to react with manganese dioxide, chlorine gas is evolved. (c) In the laboratory preparation of hydrochloric acid, hydrogen chloride gas is dissolved in water. (ii) A white precipitate of silver chloride is formed which is soluble in ammonium hydroxide. Q12. Which of the following is an electrolyte? This is a neutralisation reaction because sodium carbonate is a basic salt, while hydrochloric acid is an acid. Answer: Question 3: Complete and balance the following equations : Answer: Filed Under: ICSE Tagged With: Hydrogen Chloride, ICSE Solutions for Class 10 Chemistry, Study of Compounds, ICSE Previous Year Question Papers Class 10, ICSE Solutions for Class 10 Chemistry – Study of Compounds: Hydrogen Chloride, Concise Mathematics Class 10 ICSE Solutions, Concise Chemistry Class 10 ICSE Solutions, Concise Mathematics Class 9 ICSE Solutions, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 6 Data Base Management System for Accounting, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 5 Accounting Software Package – GNUKhata, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 4 Graphs and Charts for Business Data, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 3 Use of Spread Sheet in Business Application, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 2 Spread Sheet, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 1 Overview of Computerised Accounting System, Essay on Ransomware | Ransomware Essay for Students and Children in English, Mudra Yojana Essay | Essay on Mudra Yojana for Students and Children in English, Essay on Mysore | Mysore Essay for Students and Children in English, Essay on Solapur | Solapur Essay for Students and Children in English, Essay on Guwahati | Guwahati Essay for Students and Children in English. Answer: (i) (a) Hydrogen chloride gas (b) Sulphur (ii) Oxidation reaction. How will the action of dilute hydrochloric acid enable you to distinguish between the following: (a) Sodium carbonate and sodium sulphite. HCl and conc. The following substances are added to separate portions of the solution. (ii) When hydrochloric acid is treated with silver nitrate solution, it forms curdy white precipitate which is soluble in excess of ammonium hydroxide solution. Complete and balance the following reactions: Q6. 2NaCl + H2S04 → Na2S04 + 2HCl. (b) When the stopper is opened HCl gas comes in contact with water vapors of air and gives white fumes due to the formation of hydrochloric acid. Question: 1. If back susetin occurs, the water will collect in it and will not reach the generating flask. Lab Preparation of HCL Gas. Question 4: (i) (a) What must be added to sodium chloride to obtain hydrogen chloride ? (ii) State why such an arrangement is necessary. (b) Dense white fumes appear in the jar on account of formation of fine particles of ammonium chloride which get suspended in the gas. (iii) The colour of water that has entered the round bottomed flask is red. Answer: (i) (a) Concentrated Sulphuric acid. (iv) Why does the gas G fume strongly in air ? Give examples of two colourless gases, which combine to produce a white solid. (f) What arrangement is done to dissolve HCl gas in water? The cone. Conversion of metallic nitrates to insoluble metallic chlorides using dil. (ii) H2 + Cl2  ⟶  2HCl (iii) Hydrogen chloride (HCl) gas. Q3. Answer: (i) HCl gas can be dried by passing it over conc. Pour 4 molar HCl into the voltameter and pass direct current. The role of anhydrous calcium chloride taken in the guard tube is to: A. absorb the evolved gas. Notably, while dealing with this chapter students have to also conduct experiments to prove a certain hypothesis. (iv) Hydrogen chloride is denser than air. Question 2: Hydrogen chloride gas cannot be dried over quick time. Students also learn about the fountain experiment to determine the density and solubility of hydrogen chloride, acidic properties of hydrogen chloride solution as well as it’s reaction with ammonia. (d) Phosphorous pentoxide and calcium oxide are good drying agents, but they cannot be used to dry hydrogen chloride gas because they react with hydrogen chloride. Above 200°C. (i) Sodium thiosulphate is reacted with dilute hydrochloric acid. (c) Balanced equation for the reaction of conc. Into the voltameter pour 4 molar HCl and pass direct current. (iii) i. Removing metal stains and rust from the iron sheets. Answer: Sodium is not used to prepare hydrogen from acids because sodium metal is highly reactive. 16. The precipitate is insoluble in nitric acid but soluble in ammonium hydroxide. AgNO3 + NaCl  →  AgCl + NaNO3 To prevent the above chemical reaction, the solution of silver nitrate is prepared in distilled water. (c) What would you see when hydrogen chloride is mixed with ammonia ? (i) Sodium thiosulphate is reacted with dilute  hydrochloric acid: (ii) Calcium bicarbonate reacts with dilute hydrochloric acid: (i) Diagram to show the arrangement used for the absorption of HCl gas in water: (ii) Such an arrangement is necessary to prevent back suction of water into the apparatus and it provides a large surface area for dissolution of hydrogen chloride gas. (b) Providesa large surface area for absorption of HCl gas. Following are the few uses of Hydrochloric acid: Q8. (b) The balanced equation for the reaction: (c) The drying agent used in drying hydrogen chloride gas is conc. Answer: (i) Presence of diffused sunlight. The Selina Solutions for the academic year 2020-21 will be updated soon. When hydrogen chloride gas is dissolved in water, hydrochloric acid is formed.

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