Hydrogen
Study of the first element – Hydrogen. Answer the following questions:-
1. Give a reason why hydrogen can be placed in group 1[IA] and group 17[vIIA] of the periodic table.
2. What similarities does it show with group 1[IA] and group 17[VIIA]. With special reference to valency electrons and ion formaton and examples.
3. How does hydrogen occur in the free and combined state?
4. Which metals react with cold,steam and boiling water to form their respected oxides and hydroxides ? Give examples and balanced equations for each.Explain each in detail.
5. Name the methods of preparation of hydrogen by various ways.
6. Give balanced equations for the preparation of hydrogen with any three acids,alkalis
7. Why is nitric acid not used in the preparation of hydrogen from metals?
8. Why cannot lead be used in the preparation of hydrogen using dilute acids?
9. Define and give example of Amphoteric
10. Draw and explain the laboratory preparation of hydrogen. Give balanced equation.
11. How is the purification of hydrogen done in the laboratory . Write in detail.
12. What are the precautions taken in the preparation of hydrogen in the laboratory ?
13. Name the method of collection of hydrogen in the preparation of hydrogen in the laboratory .Why ?
14. The addition of what enhances the reaction of zinc wit h dil. Acid?
15. What are the preferred acids in the preparation of hydrogen ?Which acid is not used and why ?
16. Give reasons for the following: a] The lower end of the thistle funnel should dip below the level of the acid in the flask. b] Hydrogen is not collected over air. c] ’Magnesium reacts with very dilute nitric acid at low temperatures liberating hydrogen.
17.Explain in brief the preparation of hydrogen by the industrial method –Bosch process.
18.Name the method of the removal of CO2 and CO.With equations. 19.State the conditions and give balanced equations for the conversion of –coke to water gas,water gas to hydrogen.
20.
1. Give a reason why hydrogen can be placed in group 1[IA] and group 17[vIIA] of the periodic table.
2. What similarities does it show with group 1[IA] and group 17[VIIA]. With special reference to valency electrons and ion formaton and examples.
3. How does hydrogen occur in the free and combined state?
4. Which metals react with cold,steam and boiling water to form their respected oxides and hydroxides ? Give examples and balanced equations for each.Explain each in detail.
5. Name the methods of preparation of hydrogen by various ways.
6. Give balanced equations for the preparation of hydrogen with any three acids,alkalis
7. Why is nitric acid not used in the preparation of hydrogen from metals?
8. Why cannot lead be used in the preparation of hydrogen using dilute acids?
9. Define and give example of Amphoteric
10. Draw and explain the laboratory preparation of hydrogen. Give balanced equation.
11. How is the purification of hydrogen done in the laboratory . Write in detail.
12. What are the precautions taken in the preparation of hydrogen in the laboratory ?
13. Name the method of collection of hydrogen in the preparation of hydrogen in the laboratory .Why ?
14. The addition of what enhances the reaction of zinc wit h dil. Acid?
15. What are the preferred acids in the preparation of hydrogen ?Which acid is not used and why ?
16. Give reasons for the following: a] The lower end of the thistle funnel should dip below the level of the acid in the flask. b] Hydrogen is not collected over air. c] ’Magnesium reacts with very dilute nitric acid at low temperatures liberating hydrogen.
17.Explain in brief the preparation of hydrogen by the industrial method –Bosch process.
18.Name the method of the removal of CO2 and CO.With equations. 19.State the conditions and give balanced equations for the conversion of –coke to water gas,water gas to hydrogen.
20.