Guess Paper Chemistry Long Questions 2nd Year 2015
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IMPORTANT QUESTIONS WITH DIFFERENT VARIATIONS
Question # 1
State three reactions of zinc with nitric acid considering its concentration and temperature
Explain the properties and uses of nitric acid
Nitric acid is mostly used in the manufacture of fertilizers and explosive However it can also be used to dissolve noble metals such as gold and platinum. Briefly explain the chemistry of this property.
Compare the reactions of phenol with that of ethanol. Discuss the difference if any
Starting from ethane, outline the reaction for the preparation of following compounds
- Ethylene dibromide
Question # 2
Define the position isomerism giving at least one example of each
Define functional group isomerism and give an example.
Define isomerism. Explain its type
Question # 3
Compare the reactivity of alkenes and alkynes
Explain the acidic character of alkynes with two examples
Why do alkyne show acidic nature?
Define alkynes? How it is prepared? Give its properties and uses?
Write down the reaction of alkyl halides
Question # 4
Explain the structure of benzene on the basis of atomic orbital treatment
Explain the discovery of the structure of benzene?
Explain the stability of Benzene.
Explain the structure of benzene in the light atomic orbital treatment.
Question # 5
What are amino acids? Give their two methods of preparation
What are ct-amino acids, proteins and peptides? How are they related?
Give two method of preparation and two reactions of amino acids
Write a short note on acidic and basic character of amino acids.
How are amino acids visualized during paper chromatography?
Question # 6
Describe with diagram, the manufacture of sodium by down’s cell
Describe the commercial preparation of sodium by Down’s cell. What are advantages of this process?
Describe preparation of sodium hydro Side by Nebon Diaphragm Cell
Explain the commercial preparation of Sodium Hydroxide by the Diaphragm cell?
Question # 7
Define hybridization. Discuss the structure of ethyne on its basis
Define SP3 and SP2 hybridization; give one example in each case
Explain SP2 hybridization along with describing structure of ethane
Write down the process of hybridization of orbital and shapes of molecules
Question # 8
Describe one method each for the preparation of ethane and ethyne. How would you establish that benzene is a polymer of acetylene?
Starting from ethane, outline the reactions for preparation of the following compounds
- Ethylene dibromoethane
- Ethylene glycol
Question # 9
Write three methods of preparation of benzene
Describe the structure of benzene on the basis of resonance methods
Explain the structure of benzene in the light of atomic orbital treatment
Question # 10
What are SN reactions? Differentiate between SN1 and SN2 reactions
Explain SN1 reaction. Why are 50% inverted and 50% retention products obtained?
Question # 11
Convert the following:
- Propyne into acetone
- Ethyne into oxalic acid
- Acetic acid into methane
- 1-propanoline 1-chloro
- Propene into 2-bromopropane
- Ethane into ethyne
Question # 12
Explain reforming of petroleum with the help of suitable example
Question # 13
Define Friedel Crafts reactions. Give mechanism with an example of Friedel-Craft’s acylation reaction
Describe the Friedel-Crafts acylation of benzene with mechanism
Write a note on Friedel-Craft’s reaction
Question # 14
How steel can be manufactured by Bessemer’s process?
Explain Bessemer’s process?
What is the difference between wrought iron and steel?
Explain open hearth process for the manufacture of steel
What is the use of Aluminium in Bessemer’s process?
Question # 15
Write down the mechanism of the reaction between acetic and ethanol
Write down the mechanism of conversion of acetic acid to
- Acetyl chloride
Write down the mechanism of reaction between acetic acid and thionyl chloride
Question # 16
What do you mean by Smog? Discuss its types and give conditions for formation of smog
What is smog? Give condition for the formation of a smog
Question # 17
Discuss various periods in the modern periodic table
Discuss the position of hydrogen in group IV – A of periodic table
Justify position of hydrogen at the top of group IA and VIIA in the periodic table
Discuss the position of hydrogen over 7th-A group.
Explain the similarities and dissimilarities of hydrogen with other groups?
Question # 18
What products are formed when the following compounds are treated with ethyl magnesium bromide, followed by hydrolysis in the presence of an acid?
- (CH3)2 CO
Write methods for purification of water; explain the process of disinfection of water by chlorine
Discuss the hydrolysis of triglyceride and reaction of triglyceride with an alkali.
Give peculiar behaviors of alkali metal.
Question # 19
What is Grignard reagent? And how it can be prepared?
Explain structure and reactivity and give reaction of Grignard reagent?
Question # 20
Define cement? Give its compounds and how it can be manufactured
What do you understand by the term “setting of cement? Also discuss the changes which take place in first 24 hours.
Question # 21
How is bleaching powder prepared by Beckmann’s method?
Question # 22
How do tertiary alkyl halides undergo nucleophilic substitution reaction? Give a detailed general mechanism.
Question # 23
What are lipids? How the fats and oils are different? Also give its structure and composition?
Question # 24
How does acid deposition occur? What are its effects on environment?
Question # 25
Give the order of strength of oxy acid of halogen. Also explain the order of strength of oxy acids.
Question # 26
How does Nitrogen differ from other elements of its group?
Explain the occurrence of nitrogen and explain its different compounds?
Question # 27
Three different alkenes yield 2-Methylbutane when they are hydrogenated in the presence of a metal catalyst. Give their structures and write the equation for the reactions too.
Question # 28
Explain the Electrochemical theory for protecting the metal from corrosion.
Question # 29
Explain bleaching process in the paper industry.
Why bleaching powder show bleaching action?
Question # 30
Explain the preparation of NaOH by Nelson cell. Also give the major problems and their solution in the working of the cell.
Question # 31
Explain the purification of water through coagulation process.
Question # 32
Name the components of environment. Give approximate composition of atmosphere and lithosphere.
Question # 33
How ethyl alcohol is obtained by the fermentation of molasses and starch?
Question # 34
Define functional group. Name typical function a groups containing oxygen.
Question # 35
What is meant by orientation? Why certain substituent’s ortho and pin directive and others arc meta directive give one example of each.
Question # 36
Discuss the role of gypsum in agriculture.
How does gypsum change into Plaster of Pans?
Question # 37
Show four reactions in which lithium behaves different from elements of its own group.
Compare the chemical behavior of lithium with magnesium?
Question # 38
Grignard reagent is a reactive organic compound. Briefly discuss the reactivity and structure of Grignard reagent