KNOWLEDGE QUESTION AND ANSWER BOARD
http://knol.google.com/k/narayana-rao-kvss/-/2utb2lsm2k7a/654#
Showing posts with label Questions. Show all posts
Showing posts with label Questions. Show all posts
Thursday, January 1, 2009
Sunday, October 28, 2007
IIT JEE Chemistry Questions 21. Alkanes
Preparation, properties and reactions of alkanes:
Homologous series,
physical properties of alkanes (melting points, boiling points and density); Combustion and halogenation of alkanes;
Preparation of alkanes by Wurtz reaction and decarboxylation reactions.
------------------
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?
Answer these questions. This will help you to answer other complex ways of asking questions like MCQs, multiple matching, passage based questions and fact & cause questions.
--------------
Homologous series,
physical properties of alkanes (melting points, boiling points and density); Combustion and halogenation of alkanes;
Preparation of alkanes by Wurtz reaction and decarboxylation reactions.
------------------
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?
Answer these questions. This will help you to answer other complex ways of asking questions like MCQs, multiple matching, passage based questions and fact & cause questions.
--------------
IIT JEE Chemistry Questions 23. Alkynes
Preparation, properties and reactions of alkynes:
Physical properties of alkynes (boiling points, density and dipole moments);
Acidity of alkynes;
Acid catalysed hydration of alkynes (excluding the stereochemistry of addition and elimination);
Reduction of alkynes;
Preparation of alkynes by elimination reactions;
Addition reactions of alkynes;
Metal acetylides.
--------------
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.
--------------------
Physical properties of alkynes (boiling points, density and dipole moments);
Acidity of alkynes;
Acid catalysed hydration of alkynes (excluding the stereochemistry of addition and elimination);
Reduction of alkynes;
Preparation of alkynes by elimination reactions;
Addition reactions of alkynes;
Metal acetylides.
--------------
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 Question Bank Straight MCQ
IIT JEE Chemistry Question Bank Straight Multiple Choice Questions
Thursday, September 27, 2007
Subscribe to:
Posts (Atom)
