Monday, October 29, 2007
IIT JEE Chemistry Questions - Answers Ch. 19
Chapter 19 Simple Questions - Hybridization, Isomerism and Nomenclature
Answers to be posted.
1. What is the distance between two adjacent carbon atoms in ethane? Compare it with the distance between the same in ethene?
2. Name an isomer of diethyl ether?
3. Whatis the maximum number of isomers for an alkene C-4H-8?
4. What is dipole moment?
5. What is cis-trans isomerism?
6. What is the structural formula for 3,3-dimethyl-1-butene?
7. What is the structural formula for 3,3-dimethyl-1-butene?
8. If two compounds have same empirical formula, but different molecular formulae, what characteristics will be different?
9. What is the number of isomers c-6H-14 has?
10. What the Cl-C-Cl angle in tetrachloromethane?
11. What are the number of structural and configurational isomers of a bromo compound C-5H-9Br? How do you produce it?
12. what is keto-enol tautomerism?
13. give an example of keto-enol tautomerism.
14. What is the number of sigma and pi bonds in 1-butene-3-yne?
15. What is chirality?
16. What is a chiral carbon?
17. What is an asymmetric carbon?
18. What are conformers (conformation isomers)?
19. What is metamerism?
20. What tautomerism?
21. what are isomers?
22. What are stereo isomers?
23. what are enantiomers?
24. How can you separate two enantiomers?
25. Name some compounds that show optical activity.
26. what is the relationship between mesotartaric acid and d-tartaric acid in terms of isomerism?
27.What are axis of symmetry and centre of symmetry?
28. When do you say a molecule is chiral?
29. Whar is the number of isomers that C-7H-16 has?
30.What is a meso compound?
Answers to be posted.
1. What is the distance between two adjacent carbon atoms in ethane? Compare it with the distance between the same in ethene?
2. Name an isomer of diethyl ether?
3. Whatis the maximum number of isomers for an alkene C-4H-8?
4. What is dipole moment?
5. What is cis-trans isomerism?
6. What is the structural formula for 3,3-dimethyl-1-butene?
7. What is the structural formula for 3,3-dimethyl-1-butene?
8. If two compounds have same empirical formula, but different molecular formulae, what characteristics will be different?
9. What is the number of isomers c-6H-14 has?
10. What the Cl-C-Cl angle in tetrachloromethane?
11. What are the number of structural and configurational isomers of a bromo compound C-5H-9Br? How do you produce it?
12. what is keto-enol tautomerism?
13. give an example of keto-enol tautomerism.
14. What is the number of sigma and pi bonds in 1-butene-3-yne?
15. What is chirality?
16. What is a chiral carbon?
17. What is an asymmetric carbon?
18. What are conformers (conformation isomers)?
19. What is metamerism?
20. What tautomerism?
21. what are isomers?
22. What are stereo isomers?
23. what are enantiomers?
24. How can you separate two enantiomers?
25. Name some compounds that show optical activity.
26. what is the relationship between mesotartaric acid and d-tartaric acid in terms of isomerism?
27.What are axis of symmetry and centre of symmetry?
28. When do you say a molecule is chiral?
29. Whar is the number of isomers that C-7H-16 has?
30.What is a meso compound?
IIT JEE Chemistry Questions - Answers Ch. 21 Alkanes
Answers to be posted
1. What happens to boiling point of alkanes as molecular mass increases?
2. What happens to boiling point of branched isomers of alkanes?
3. Under what conditions does monochlorination of methane take place?
4. What is the `reaction in Kolbe Electrolytic method of preparing alkanes?
5. What are the reactants and products in hydrolysis of Grignard reagent?
6. In the case of halogenation of alkanes, what is order of reactivity among chlorine, fluorine, and bromine?
7. At ordinary temperatures, why is ultraviolet radiation required to initiate a reaction between halogens and alkanes?
8. What do you understand by 1 degree H, 2 degree H and 3 degree H?
9. What is the difference in reactions between an alkane and fluorine and an alkane and bromine?
10. What is the major product in reaction between bromine and n-butane?
11. What are the products of reaction between n-butane and chlorine at room temperature and sunlight?
12. How do you get iso-butane from n-butane?
13. When do you get aromatic compounds from alkanes?
14. What is the more common name of Methane?
15. What is % composition of Methane in coal gas?
16. How do you produce methane from aluminium chloride?
17. What are the reactants and products of Wurtz reaction?
1. What happens to boiling point of alkanes as molecular mass increases?
2. What happens to boiling point of branched isomers of alkanes?
3. Under what conditions does monochlorination of methane take place?
4. What is the `reaction in Kolbe Electrolytic method of preparing alkanes?
5. What are the reactants and products in hydrolysis of Grignard reagent?
6. In the case of halogenation of alkanes, what is order of reactivity among chlorine, fluorine, and bromine?
7. At ordinary temperatures, why is ultraviolet radiation required to initiate a reaction between halogens and alkanes?
8. What do you understand by 1 degree H, 2 degree H and 3 degree H?
9. What is the difference in reactions between an alkane and fluorine and an alkane and bromine?
10. What is the major product in reaction between bromine and n-butane?
11. What are the products of reaction between n-butane and chlorine at room temperature and sunlight?
12. How do you get iso-butane from n-butane?
13. When do you get aromatic compounds from alkanes?
14. What is the more common name of Methane?
15. What is % composition of Methane in coal gas?
16. How do you produce methane from aluminium chloride?
17. What are the reactants and products of Wurtz reaction?
IIT JEE Chemistry Questions - Answers Ch. 23
23. Alkynes
Answers to be posted
On methods of preparation
1. what is produced by hydrolysis of Calcium carbide?
2. What is produced by hydrolysis of magnesium carbide?
3. Name the potassium salt used to produce acetylene in Kolbe's electrolytic method.
4. what is the first stage in dehydrohalenation of vicinal dihalides and what are the conditions required for the reaction?
5. what is the second stage in dehydrohalenation of vicinal dihalides and what are the conditions required for the reaction?
6. what do you get in the first stage after reaction of 1,1 -dibromopentane with KOH(alc)?
7. How do you get ethyne from iodoform?
8. How do you get ethyne from chloroform?
9. what do you get by hydrolysis of Aluminium carbide?
10. which gaseous hydrocarbon is produced when calcium carbide reacts with water?
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Simple questions on reactions of Alkynes
1. When propyne is treated with acqeous H-2SO-4 in the presence of HgSO-4, which ketone is formed?
2. Which hydrocarbon contains acidic hydrogen?
3. Give bases stronger and weaker acetylene?
4. Give acids stronger than and weaker than acetylene?
5. To add water to a triple bond what other chemicals are required?
6. When R’MgBr reacts with RC- triple bond-CH, what alkane will result?
7. What are the products of ozonolysis of triple bond (alkyne)?
8. What is the output when ethyne is passed through hot iron tube at 400 degrees Celsius?
9. What is Lindlar’s catalyst?
10. Which alkene will emerge when alkyne is reduced with Lindlar’s catalyst?
11. Which alkene will emerge when alkyne is reduced with lithium metal in liquid ammonia solvent?
12. Among alkynes and alkenes, which are more reactive to halogens? Why?
13. What is the product obtained by adding water to 1-butyne in the presence of required catalysts? What are the catalysts?
14. What are tautomers?
15. What is final the output of polymerization of acetylene? What are intermediate outputs?
16. What are alkadienes?
17. What do you get by adding H-2 to 2-butyne? Give the two alternatives due to difference in reducing agents.
Answers to be posted
On methods of preparation
1. what is produced by hydrolysis of Calcium carbide?
2. What is produced by hydrolysis of magnesium carbide?
3. Name the potassium salt used to produce acetylene in Kolbe's electrolytic method.
4. what is the first stage in dehydrohalenation of vicinal dihalides and what are the conditions required for the reaction?
5. what is the second stage in dehydrohalenation of vicinal dihalides and what are the conditions required for the reaction?
6. what do you get in the first stage after reaction of 1,1 -dibromopentane with KOH(alc)?
7. How do you get ethyne from iodoform?
8. How do you get ethyne from chloroform?
9. what do you get by hydrolysis of Aluminium carbide?
10. which gaseous hydrocarbon is produced when calcium carbide reacts with water?
-------------
Simple questions on reactions of Alkynes
1. When propyne is treated with acqeous H-2SO-4 in the presence of HgSO-4, which ketone is formed?
2. Which hydrocarbon contains acidic hydrogen?
3. Give bases stronger and weaker acetylene?
4. Give acids stronger than and weaker than acetylene?
5. To add water to a triple bond what other chemicals are required?
6. When R’MgBr reacts with RC- triple bond-CH, what alkane will result?
7. What are the products of ozonolysis of triple bond (alkyne)?
8. What is the output when ethyne is passed through hot iron tube at 400 degrees Celsius?
9. What is Lindlar’s catalyst?
10. Which alkene will emerge when alkyne is reduced with Lindlar’s catalyst?
11. Which alkene will emerge when alkyne is reduced with lithium metal in liquid ammonia solvent?
12. Among alkynes and alkenes, which are more reactive to halogens? Why?
13. What is the product obtained by adding water to 1-butyne in the presence of required catalysts? What are the catalysts?
14. What are tautomers?
15. What is final the output of polymerization of acetylene? What are intermediate outputs?
16. What are alkadienes?
17. What do you get by adding H-2 to 2-butyne? Give the two alternatives due to difference in reducing agents.
IIT JEE Chemistry Questions - Answers Ch. 25
Ch. 25 Alcohols
Answers to be posted
Simple Questions
1. Which type of alcohols react fastest with Lucas reagent at room temperature?
2. How do you prepare methanol industrially?
3. Is 2-methylpropan-2-ol a teriary alcohol?
4. How do you prepare methyl ethyl ketone?
5. How do you prepare butanonitrile?
6. Out of primary, secondary and tertiary alcohols, which ones have minimum boiling point?
7.What is the order of reactivity of HX towards ROH?
8. What is the order of reactivity of various degrees of alcohols with HX?
9. what are the products of dehydration of 1-butanol? What is the main product?
10. What is the reactivity of various degrees of alcohol with active metals?
11. What is the relative reactivity of alcohols in comparison to water and ethyne?
12. How do you change a 1 degree alcohol into 1 degree aldehyde?
13. In the Victor Meyer test which type of alcohols show blue colouration?
14. what is Lucas reagent?
15. Which type of alcohols do not react with Lucas reagent?
16. What is glycerine? Is it a alcohol?
17. In the Victor Meyer test which type of alcohols show red colouration?
18. In the Lucas test, how do you identify alcohols?
19. What do you get when vapours of 2-propanol are passed hot metallic Cu at 570 K?
Answers to be posted
Simple Questions
1. Which type of alcohols react fastest with Lucas reagent at room temperature?
2. How do you prepare methanol industrially?
3. Is 2-methylpropan-2-ol a teriary alcohol?
4. How do you prepare methyl ethyl ketone?
5. How do you prepare butanonitrile?
6. Out of primary, secondary and tertiary alcohols, which ones have minimum boiling point?
7.What is the order of reactivity of HX towards ROH?
8. What is the order of reactivity of various degrees of alcohols with HX?
9. what are the products of dehydration of 1-butanol? What is the main product?
10. What is the reactivity of various degrees of alcohol with active metals?
11. What is the relative reactivity of alcohols in comparison to water and ethyne?
12. How do you change a 1 degree alcohol into 1 degree aldehyde?
13. In the Victor Meyer test which type of alcohols show blue colouration?
14. what is Lucas reagent?
15. Which type of alcohols do not react with Lucas reagent?
16. What is glycerine? Is it a alcohol?
17. In the Victor Meyer test which type of alcohols show red colouration?
18. In the Lucas test, how do you identify alcohols?
19. What do you get when vapours of 2-propanol are passed hot metallic Cu at 570 K?
IIT JEE Questions - Answers Ch. 26
Ch. 26 Alkyl and Aryl Halides
Answers to be posted
Simple Questions
1. Is the C-X bond in alkyl halides polar?
2. How does the bond strength change with increasing size of halogen atoms?
3 Between alkyl halides and corresponding alkanes whose boiling point is more?
4. How does the boiling point of alkyl halide change with size of the halogen atom?
5. How do you produce nitroalkane?
6. How do you produce isocyanide?
7. what is S-N-1 mechanism?
8. What is S-N-2 mechanism?
9. Give an example of converting an alkyl halide to alkene.
10. How do you produce Grignard reagent?
11. How do you prepare aryl halides by Friedel Crafts halogenation?
12. How do you prepare aryl halides by Sandmeyer reaction?
13. what is Schiemann reaction?
14. What is an aryl group?
15. Between aryl halides and alkyl halides which are more reactive to nucleophilic substitutin?
16. What is the major product when 2-bromobutane is treated with ethanolic KOH?
17. How many isomers does dibromobutane has?
18. what are the products of reaction between RMgX and ethyl formate?
19. what are the products of reaction between RMgX and water?
20. What is a Fittig reaction?
21. What does chlorination of toluene with excess of chlorine under the conditions of light and heat produce?
22. Is fluorination of benzene a exothermic reaction?
23. What is Wurtz-Fittig reaction?
24. What is Walden inversion?
25. In the reaction of p-chlorotoluene with KNH-2 in liquor Ammonia, what is the major product?
26. What happens to dipole moment as the size of the halogen atom increases in alkyl halides?
27. What is steric hindrance?
28. Are alkyl chlorides lighter than water?
29. What is Saytzeff rule?
30. What is benzenediazonium chloride?
Answers to be posted
Simple Questions
1. Is the C-X bond in alkyl halides polar?
2. How does the bond strength change with increasing size of halogen atoms?
3 Between alkyl halides and corresponding alkanes whose boiling point is more?
4. How does the boiling point of alkyl halide change with size of the halogen atom?
5. How do you produce nitroalkane?
6. How do you produce isocyanide?
7. what is S-N-1 mechanism?
8. What is S-N-2 mechanism?
9. Give an example of converting an alkyl halide to alkene.
10. How do you produce Grignard reagent?
11. How do you prepare aryl halides by Friedel Crafts halogenation?
12. How do you prepare aryl halides by Sandmeyer reaction?
13. what is Schiemann reaction?
14. What is an aryl group?
15. Between aryl halides and alkyl halides which are more reactive to nucleophilic substitutin?
16. What is the major product when 2-bromobutane is treated with ethanolic KOH?
17. How many isomers does dibromobutane has?
18. what are the products of reaction between RMgX and ethyl formate?
19. what are the products of reaction between RMgX and water?
20. What is a Fittig reaction?
21. What does chlorination of toluene with excess of chlorine under the conditions of light and heat produce?
22. Is fluorination of benzene a exothermic reaction?
23. What is Wurtz-Fittig reaction?
24. What is Walden inversion?
25. In the reaction of p-chlorotoluene with KNH-2 in liquor Ammonia, what is the major product?
26. What happens to dipole moment as the size of the halogen atom increases in alkyl halides?
27. What is steric hindrance?
28. Are alkyl chlorides lighter than water?
29. What is Saytzeff rule?
30. What is benzenediazonium chloride?
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