ETHER_Collection Of Past Collection

This blog contains a collection of past questions on Chapter ether as per the NEB board. Attempt all questions so that you become familiar with the types of questions that appear in Board in chapter Ether. PDF is also available and can be accessed simply by clicking the download button given below. 

Very Short Answer Question:

1. What is the functional group of ether and amide?
2. Write the structure of: Anisole and2-methoxypropane.
3. Write IUPAC names of ethers represented by molecular formula C₅H₁₂O.
4. Write down the possible unsymmetrical ethers of C₄H₁₀O and their IUPAC names.
5. There are three possible isomeric ethers of C₄H₁₀O. One of them is ethoxyethane. Write the other two isomers and give their IUPAC name.
6. What is unsymmetrical ether? Write an example and IUPAC name.
7. Write an example of Williamson’s etherification reaction. What is its importance?
8. What is Williamson’s etherification reaction?
9. Prepare CH₃-O-CH₂CH₃ by using Williamson’s ether synthesis.
10. What is unsymmetrical ether? Give Williamson’s synthesis to prepare unsymmetrical ethers.
11. Write an unsymmetrical ether of C₃H₈O. How would you prepare the ether by using Williamson’s synthesis?
12. How is unsymmetrical ether prepared by Williamson’s ether synthesis?
13. Give an example of unsymmetrical ether and write Williamson’s synthesis process for its preparation.
14. Write down isomeric ether of isopropyl alcohol and use Williamson’s synthesis process for the preparation of such ether.
15. Write IUPAC name of CH₃OCH(CH₃)₂ and use Williamson’s synthesis method for its preparation.
16. Give correct chemical reactions for the preparation of 2-methoxypropane.
17. What happens when Sodium phenolate reacts with iodomethane?
18. Write the action of Sodium phenolate with iodomethane
19. Write chemical equation for the reactions taking place when: a)Sodium phenoxide reacts with iodomethane. b)Ethoxyethane is exposed to light and air.
20. How would you obtain anisole from phenol?
21. Give correct chemical reactions for the preparation of anisole.
22. Starting from CH₃ONa, how would you prepare methoxybenzene? What happens when methoxy benzene is treated with excess HI?
23. Prepare methoxybenzene by using Williamson's ether synthesis.
24. How is methoxybenzene prepare from phenol?
25. Give reason:a)It is dangerous to boil a sample of ether stored for a long time.b)Ether is stored in a bottle containing iron wire.
26. Write down isomeric ether of isopropyl alcohol. What happens when the isomeric ether is heated with excess HI?
27. Write an example of Williamson’s etherification. Name the isomer of C₂H₆O which reacts with excess HI, gives iodomethane as the major product and write the reaction for it.
28. What is the action of ethoxyethane with a)PCl₅ and b)HI (conc. and cold)
29. What action takes place when an excess of ethanol is heated with conc. Sulphuric acid at about 140°C?
30. Convert ethoxyethane into methoxy methane. [2 times]
31. How would you obtain methoxyethane from ethanol?
32. Write a sequence of chemical reactions for the conversion of ethoxyethane to methoxyethane.

Short Answer Question:

1. Describe the laboratory method of preparation of ethoxyethane.  How is ethoxyethane converted into methoxy methane?
2. Describe the laboratory method of preparation of ethoxyethane.  Why is it dangerous to boil an old sample of ether?
3. Describe the laboratory method of preparation of ethoxyethane. What happens when ethoxyethane is exposed to air?
4. Write down the method of preparation of ethoxyethane.
5. Write down a suitable chemical reaction for the preparation of ethoxyethane from ethanol. How is ethoxyethane converted into methoxy methane? What happens when ethoxyethane is heated with:a)Air? b)Conc. H₂SO₄? [3 times]
6. How is ethoxyethane prepared in the laboratory in a pure and dry state?
7. Describe the laboratory method of preparation of ethoxyethane with a neat and labeled diagram.
8. How is ethoxyethane prepared in the laboratory? Write Williamsons’ synthesis for the preparation of an unsymmetrical ether. 
9. Describe the preparation of ethoxyethane in the laboratory.
10. Write short notes on the Laboratory preparation of ethoxy ethane. [3 times]
11. Write short notes on the Laboratory preparation of diethyl ether. 

    

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This site provides notes on different chapters of Chemistry of Grade XI and XII (NEB Board). Also, it posts number of blogs on Collection of past questions and solution. Conversion chart, rules, Chemical test are some additional features.

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