ICSE Worksheet for chapter-8 Hydrogen Chloride class 10
Worksheet For class 10
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- Introduction, preparation of HCl gas by NaCl and conc.H2SO4(lab preparation)
- Physical and chemical properties of HCl gas.
- Laboratory method of preparation of HCl acid, its physical and chemical properties, tests and uses.
Section - 1
Q1. State what you see when:
- A piece of moist blue litmus paper is placed in a gas jar of chlorine.
- Silver nitrate solution is added to dilute hydrochloric acid.
- Give the name of a chemical, which on being added to sodium chloride, will produce hydrogen chloride gas.
- Q2. Name one lead compound that can be used to oxidize HCl to chlorine.
Q3. Name the gas evolved when the following mixtures are heated:
Manganese (IV) oxide and concentrated hydrochloric acid. Write balanced equation also.
- Q4. What is the name given to the crystalline form, from which sodium chloride is obtained by mining?
- Q5. Write the equation for the preparation of hydrogen chloride from sodium chloride and sulphuric acid. State whether sulphuric acid should be concentrated or dilute.
Section - 2
- Q6. How will you dry HCl gas?
- Q7. Give three tests of hydrogen chloride.
Q8. Give reasons why :
- Gastric juices of mammals are acidic.
- HCl is considered a polar covalent compound.
- Q9. A colorless gas G fumes strongly in the air. The gas gives dense white fumes when a glass rod dipped in ammonia solution in held near the gas.
Answer the following questions:
- Name the gas G.
- Name two chemicals used in the preparation of the gas G.
- Write the chemical equation for the reaction of the chemicals named in(ii) when:
- The reaction mixture is not heated.
- The reaction mixture is heated above 100°C.
- Why does the gas G fume strongly in air?
- Why does the gas G form dense white fumes with ammonium hydroxide?
- Q10. In preparing hydrogen chloride by heating the mixture of sodium chloride and concentrated sulphuric acid, why does the mixture not heated above the temperature 170°C.
Q11. Name all the products formed when conc. Hydrochloric acid is
- Added to a solution of silver nitrate
- Warmed with manganese dioxide
- Added to a solution of lead nitrate.
- Q12. Why cannot be hydrogen chloride e dried by using quicklime or phosphorous pentoxide?
Q13. A greenish gas A is dissolved in water to form a solution containing two acids B and C. After allowing this solution to stand in bright sunlight, only the acid remained, and a colourless gas D was seen to bubble from the solution. Write down the names for A, B, C and D.
- How is hydrochloric acid prepared from hydrogen chloride?
- Name two lead compounds that can used to oxidize hydrogen chloride to chlorine (giving balanced equation)
- Q14. How can you obtain (i) chlorine from hydrochloricacid and (ii) hydrochloric acid from chlorine? Give necessary equations. How is hydrogen chloride gas collected and dried?
- Q15. Why does water in the fountain experiment run into a flask filled with hydrogen chloride gas?