ºÝºÝߣ

ºÝºÝߣShare a Scribd company logo

Ch ammonia

•Download as PPTX, PDF•
•
Rajiv Jain
Rajiv Jain

This document discusses ammonia, its properties, production, and reactions. It provides information on collecting ammonia through downward displacement of air and drying it with calcium oxide. Key reactions discussed include producing ammonia from ammonium chloride and calcium hydroxide, and the reducing nature of ammonia shown through its reaction with copper oxide. The Haber and Ostwald processes for producing ammonia and nitric acid respectively are summarized.

1 of 40
Downloaded 19 times
YOU TUBE CHANNEL: KNOW THE CHEMISTRY BY RAJIV JAIN
THOUGHT FOR THE SESSION
THOUGHT FOR THE SESSION
AMMONIA
Ch ammonia
Ammonia collection method:
Ch ammonia
Ch ammonia
Ammonia as reducing agent
Ch ammonia
Ostwald process for manufacturing Nitric acid
Nitric Acid preparation
Reactions of ammonia with mineral acids
Ch ammonia
Ch ammonia
Important reactions in ammonia
Ch ammonia
TEST FOR AMMONIA Moist red LITMUS blue / INIDCATOR/ pH test Pungent smell Dense white fumes with HCl It turns colorless nessler’s reagent to brown
Q1. The gas used as reducing agent in reducing copper oxide to copper. Ans1. Ammonia Q2. Write balanced chemical equations: Lab preparation of ammonia from ammonium salts. ANS 2. NH4Cl + Ca(OH)2  CaCl2 + NH3 + 2H2O
(II)Reaction of ammonia with excess chlorine. ANS 2(II) 3Cl2 (excess) + NH3  NCl3 + 3 HCl
(III) Reaction of ammonia with sulphuric acid. ANS2 (III) 2 NH3 + H2SO4  (NH4)2SO4 (IV) Action of warm water on magnesium nitride. ANS (IV) Mg3N2 + 6 H2O  3Mg(OH)2 + 2NH3
Q3. (i) Ammonium nitrate is not used in the preparation of ammonia because ANS3 (I) It is explosive in nature (ii) drying agent during the process. ANS3 (II) Calcium oxide
(iii) How is ammonia gas collected? Ans 3(IV) Downward displacement of air. (iv) Explain why it is not collected over water. ANS3(IV) Because it is highly soluble in water.
Q4. The diagram shows an experimental set up for the lab preparation of a pungent smelling gas. The gas is alkaline in nature. (i) Name the gas collected in the jar. ANS 4. ammonia (ii) Write the balanced equation for the above preparation. Ans 4 (ii) NH4Cl + Ca(OH)2  CaCl2 + NH3 + 2H2O
Q4How is the gas being collected? ANS4(iii). Downward displacement of air. (iv)Name the drying agent used. ANS 4(iv). Quick lime (v) How will you find that the jar is full of gas? ANS 4 (v) Bring a rod dipped in hydrogen chloride. Dense white fumes gives white ppt.
Q5. Ammonia can be obtained by adding water to: (A) Ammonium chloride. (B) Ammonium nitrate. (C) Magnesium nitride. (D) Magnesium nitrate. ANS5 (d). Magnesium nitride. Q6. Identify the following substances: (i) An alkaline gas A, which gives dense white fumes with hydrogen chloride. ANS 6 (i) Ammonia
Q7. Copy and complete the following table relating to important industrial processes. Output refers to the product of the process not the intermediate steps.
Name of Process Inputs Catalyst Equation for catalyzed reaction Output Haber Process Ammonia + Air Platinum Nitric acid Contact Process Sulphur dioxide + oxygen Vanadium peñtoxide
Name of Process Inputs Catalyst Equation for catalyzed reaction Output Haber Process Hydrogen +nitrogen Finely divided iron N2 + 3H2  2NH3 Ammonia Ostwald process Ammonia + Air Platinum 4NH3+5O 2 4NO+ 6H2O Nitric acid Contact Process Sulphur dioxide + oxygen Vanadium pentoxide 2SO2 +O2  SO3 Sulphuric acid
Q8. Write a balanced equation in which ammonia is oxidised by: (i) A metal oxide; (reducing agent property of ammonia) 3CuO + 2NH3  3 Cu + N2 + 3H2O (ii) A gas which is not oxygen. 3Cl2 (excess) +8NH3  6 NH4Cl + N2
Q9. (i) Name the substance used for drying ammonia. ANS 9. Calcium oxide or lime (ii) Write an equation to illustrate the reducing nature of ammonia. Ans 9(ii) 3CuO + 2NH3  3 Cu + N2 + 3H2O Copper oxide (black) is reduced to copper (brown color metallic copper)
Q9. With reference to Haber’s process for the preparation of ammonia, write the equation and the conditions required. ANS. N2 + 3H2  2NH3 T= 450 0C, 200 atm, finely divided iron Prmoter: molybdenum
Q10. Write the balanced chemical equation: (i) A mixture of ammonium chloride and slaked lime is heated. NH4Cl + Ca(OH)2  CaCl2 + NH3 + 2H2O (ii) Aluminium nitride and water. AlN + 3 H2O  Al(OH)3 + NH3
Q11. The following reaction is carried out: A: Nitrogen + metal  compound X B: X + water  ammonia + other compound. C: Ammonia + metal oxide  metal + water + N2 The one metal which can be used in reaction A is Ans. Magnesium.
Q11b . The following reaction is carried out: A: Nitrogen + metal  compound X B: X + water  ammonia + other compound. C: Ammonia + metal oxide  metal + water + N2 (a)State the condition for the reaction Ans red hot / high temperature (b) write the formula of the compound X. Heating Ans Magnesium hydroxide (c) What property is demonstrated by reaction C. Ans. Reducing agent
Q12. Write equations for the following reactions: (i) Burning of ammonia in oxygen Ans. 4NH3 + 3O2  2N2 + 6H2O (ii) Catalytic oxidation of ammonia Ans. 4NH3+5O2 Pt  4NO+ 6H2O
Q13.(i) What do you observe when ammonia reacted with oxygen in absence of catalyst? Ans. Greenish yellow flame (ii) Name the catalyst used. Ans. platinum (iii) In the reaction, the catalyst glows red hot. Why ? Ans. because reaction takes place at high temperature. (iv) What is the name of the industrial process? Ans. Ostwald process
Q14. What do you observe when ammonia gas is bubbled through red litmus solution? Ans14. Red litmus solution changes to blue. Q15. Write a balanced chemical equation when solution of ammonium chloride and sodium hydroxide are mixed and heated. Ans15. NH4Cl + NaOH  NaCl + H2O + NH3
Ch ammonia
Please share and subscribe to gain knowledge from more videos …. Facebook page and You tube channel: Know the Chemistry by Rajiv Jain

More Related Content

Ch ammonia

  • 1. YOU TUBE CHANNEL: KNOW THE CHEMISTRY BY RAJIV JAIN
  • 2. THOUGHT FOR THE SESSION
  • 3. THOUGHT FOR THE SESSION
  • 11. Ostwald process for manufacturing Nitric acid
  • 13. Reactions of ammonia with mineral acids
  • 18. TEST FOR AMMONIA ï‚—Moist red LITMUS blue / INIDCATOR/ pH test ï‚—Pungent smell ï‚—Dense white fumes with HCl ï‚—It turns colorless nessler’s reagent to brown
  • 19. Q1. The gas used as reducing agent in reducing copper oxide to copper. Ans1. Ammonia Q2. Write balanced chemical equations: Lab preparation of ammonia from ammonium salts. ANS 2. NH4Cl + Ca(OH)2  CaCl2 + NH3 + 2H2O
  • 20. (II)Reaction of ammonia with excess chlorine. ANS 2(II) 3Cl2 (excess) + NH3  NCl3 + 3 HCl
  • 21. (III) Reaction of ammonia with sulphuric acid. ANS2 (III) 2 NH3 + H2SO4  (NH4)2SO4 (IV) Action of warm water on magnesium nitride. ANS (IV) Mg3N2 + 6 H2O  3Mg(OH)2 + 2NH3
  • 22. Q3. (i) Ammonium nitrate is not used in the preparation of ammonia because ANS3 (I) It is explosive in nature (ii) drying agent during the process. ANS3 (II) Calcium oxide
  • 23. (iii) How is ammonia gas collected? Ans 3(IV) Downward displacement of air. (iv) Explain why it is not collected over water. ANS3(IV) Because it is highly soluble in water.
  • 24. Q4. The diagram shows an experimental set up for the lab preparation of a pungent smelling gas. The gas is alkaline in nature. (i) Name the gas collected in the jar. ANS 4. ammonia (ii) Write the balanced equation for the above preparation. Ans 4 (ii) NH4Cl + Ca(OH)2  CaCl2 + NH3 + 2H2O
  • 25. Q4How is the gas being collected? ANS4(iii). Downward displacement of air. (iv)Name the drying agent used. ANS 4(iv). Quick lime (v) How will you find that the jar is full of gas? ANS 4 (v) Bring a rod dipped in hydrogen chloride. Dense white fumes gives white ppt.
  • 26. Q5. Ammonia can be obtained by adding water to: (A) Ammonium chloride. (B) Ammonium nitrate. (C) Magnesium nitride. (D) Magnesium nitrate. ANS5 (d). Magnesium nitride. Q6. Identify the following substances: (i) An alkaline gas A, which gives dense white fumes with hydrogen chloride. ANS 6 (i) Ammonia
  • 27. Q7. Copy and complete the following table relating to important industrial processes. Output refers to the product of the process not the intermediate steps.
  • 28. Name of Process Inputs Catalyst Equation for catalyzed reaction Output Haber Process Ammonia + Air Platinum Nitric acid Contact Process Sulphur dioxide + oxygen Vanadium peñtoxide
  • 29. Name of Process Inputs Catalyst Equation for catalyzed reaction Output Haber Process Hydrogen +nitrogen Finely divided iron N2 + 3H2  2NH3 Ammonia Ostwald process Ammonia + Air Platinum 4NH3+5O 2 4NO+ 6H2O Nitric acid Contact Process Sulphur dioxide + oxygen Vanadium pentoxide 2SO2 +O2  SO3 Sulphuric acid
  • 30. Q8. Write a balanced equation in which ammonia is oxidised by: (i) A metal oxide; (reducing agent property of ammonia) 3CuO + 2NH3  3 Cu + N2 + 3H2O (ii) A gas which is not oxygen. 3Cl2 (excess) +8NH3  6 NH4Cl + N2
  • 31. Q9. (i) Name the substance used for drying ammonia. ANS 9. Calcium oxide or lime (ii) Write an equation to illustrate the reducing nature of ammonia. Ans 9(ii) 3CuO + 2NH3  3 Cu + N2 + 3H2O Copper oxide (black) is reduced to copper (brown color metallic copper)
  • 32. Q9. With reference to Haber’s process for the preparation of ammonia, write the equation and the conditions required. ANS. N2 + 3H2  2NH3 T= 450 0C, 200 atm, finely divided iron Prmoter: molybdenum
  • 33. Q10. Write the balanced chemical equation: (i) A mixture of ammonium chloride and slaked lime is heated. NH4Cl + Ca(OH)2  CaCl2 + NH3 + 2H2O (ii) Aluminium nitride and water. AlN + 3 H2O  Al(OH)3 + NH3
  • 34. Q11. The following reaction is carried out: A: Nitrogen + metal  compound X B: X + water  ammonia + other compound. C: Ammonia + metal oxide  metal + water + N2 The one metal which can be used in reaction A is Ans. Magnesium.
  • 35. Q11b . The following reaction is carried out: A: Nitrogen + metal  compound X B: X + water  ammonia + other compound. C: Ammonia + metal oxide  metal + water + N2 (a)State the condition for the reaction Ans red hot / high temperature (b) write the formula of the compound X. Heating Ans Magnesium hydroxide (c) What property is demonstrated by reaction C. Ans. Reducing agent
  • 36. Q12. Write equations for the following reactions: (i) Burning of ammonia in oxygen Ans. 4NH3 + 3O2  2N2 + 6H2O (ii) Catalytic oxidation of ammonia Ans. 4NH3+5O2 Pt  4NO+ 6H2O
  • 37. Q13.(i) What do you observe when ammonia reacted with oxygen in absence of catalyst? Ans. Greenish yellow flame (ii) Name the catalyst used. Ans. platinum (iii) In the reaction, the catalyst glows red hot. Why ? Ans. because reaction takes place at high temperature. (iv) What is the name of the industrial process? Ans. Ostwald process
  • 38. Q14. What do you observe when ammonia gas is bubbled through red litmus solution? Ans14. Red litmus solution changes to blue. Q15. Write a balanced chemical equation when solution of ammonium chloride and sodium hydroxide are mixed and heated. Ans15. NH4Cl + NaOH  NaCl + H2O + NH3
  • 40. Please share and subscribe to gain knowledge from more videos …. Facebook page and You tube channel: Know the Chemistry by Rajiv Jain