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Title: Important questions of chemistry
Description: This is chemistry important questions for 2nd year students, those who want to study well and get good marks, this pdf will help you to score well
Description: This is chemistry important questions for 2nd year students, those who want to study well and get good marks, this pdf will help you to score well
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RANJAN R K ( MSc Bed)
CHEMISTRY
II PU IMPORTANT QUESTIONS
Solid state
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Difference between crystalline and amorphous solids
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What are tetrahedral and octahedral voids?
A compound is formed by two elements X and Y
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What is the formula of the compound?
Calculate the packing efficiency in simple cubic lattice, BCC and FCC
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56 nm
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Molar mass of the element is 40 g/mol
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What are F-centres?
Give the differences between n-type and p-type semiconductors
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Give the difference between intrinsic and extrinsic semi conductors
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Define M, m and x
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Write its mathematical form
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State and explain Raoult’s law of liquid solutions
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Find out
the composition of the liquid mixture if total vapour pressure is 600 mm Hg
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Give the differences between ideal and non-ideal solutions
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The vapour pressure of pure benzene at certain temperature is 0
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A non-volatile, non
electrolyte solid weighing 0
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Vapour pressure of the solution then
is 0
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What is the molar mass of the solid substance?
The boiling point of a solution of 0
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1o C higher than
that of ether
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02 K kg mol-1)
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4g) is dissolved in 100 g benzene gave a solution which freezes at 277
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Pure benzene
freezes at 278
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76
K
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What are isotonic, hypertonic and hypotonic solutions? Give examples
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MOBILE- 7829051001
RANJAN R K ( MSc Bed)
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( The value of R is 0
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Electrochemistry
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What is redox reaction?
What is a salt bride?
Explain the construction and working of Daniel cell
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What are the importance’s of SRP values?
Write Nernst equation for a Galvanic and Daniel cell
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Give the relation between Gibb’s free energy change of the reaction and equilibrium constant
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6 M) || Sn+2 (0
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44 V E0Sn=+0
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On what factors the conductance of a solution depends?
What are strong and weak electrolytes? Give examples
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Molar conductance of 0
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52 S cm2 mol-1
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State Kohlrausch law
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The conductivity of 0
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95×10-5 S cm-1
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5 S cm2mol-1
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A solution of CuSO4 is electrolysed for 10 minutes with a current of 1
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What is the mass of
copper deposited at the cathode? Atomic mass of copper = 63
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Explain lead-storage battery
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Explain Nickel-cadmium cell
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Explain the methods used to prevent corrosion?
Chemical Kinetics
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Give differences between order and molecularity
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Derive an expression for integrated rate equation for zero order and first order reaction
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MOBILE- 7829051001
RANJAN R K ( MSc Bed)
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3 minutes for 50% completion
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What is pseudo first order reaction? Give an example
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Write Arrhenius equation
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Explain Arrhenius theory of activated complex by using potential energy level diagram
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Explain the effect of catalyst on the rate of a reaction
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The first order rate constant for the decomposition of N 2O5 at 00C is 5
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If the energy of
activation is 6200 J, calculate the temperature at which the rate constant is 6
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When was it half completed?
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Surface chemistry
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Give difference between physisorption and chemisorptions
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Give the application of adsorption
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Explain shape selective catalysis by zeolites
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Explain the mechanism of enzyme catalysis
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Explain cleansing action of soap
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What is peptization, Dialysis, Tyndall effect and Brownian movement?
State Hardy-Schulze rule
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Give the application of colloids
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Write the composition of copper matte
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Explain the leaching of alumina from bauxite
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Explain the extraction of cast iron or pig iron with neat labelled diagram
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Explain electrolytic refining
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Explain Mond’s process
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MOBILE- 7829051001
RANJAN R K ( MSc Bed)
The p-block elements
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Give the reasons for anomalous be from Xehaviour of Nitrogen, Oxygen and Fluorine
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Explain brown ring test
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Write the method of preparation of PCl5 and explain its structure
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How is ozone prepared? Write its resonance structure
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Name the radioactive group 17 element?
Halogens have very high ionisation enthalpy? Give reason
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What are inter halogen compound? Name its types with examples
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Why Group 18 elements are named as noble gases
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Noble gases have very low melting and boiling point
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How do you prepare XeF6 from XeF4?
Write the structure of XeO3, XeF4, XeOF4 and XeF2
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Noble gases are less reactive
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The d- and f-block elements
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What are transition elements?
Explain the variation of atomic and ionic sizes of transition metals
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Why?
Explain the variation of ionisation enthalpies in d-block elements
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Scandium has less E0 (M3+/M2+) value
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Explain the catalytic properties of transition metals
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How is potassium dichromate and potassium permanganate manufactured?
Give the differences between lanthanides and actinides
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Give the application of d and f-block elements
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Give two reasons
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What are the postulates of Werner’s theory of co-ordination compounds?
Give the two demerits of Werner’s theory
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What are homoleptic and heteroptic complexes? Give examples
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Write the structure of hexaamminecobalt(III)chloride , tetrachloridonickelate(II)ion and
diamminedichloridoplatinum(II)
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What is optical isomerism and chiral molecule?
On the basis of VBT, explain the hybridization, geometrical shape and magnetic property of
[Co(NH3)6]3+ , [CoF6]3- , [Ni(CN)4]2- and [NiCl4]2-
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Explain Crystal field splitting in octahedral and tetrahedral complexes using energy level diagram
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What is pairing energy?
What is synergic effect? What is the effect on M –CO bond in metal carbonyls?
Give the important applications of co-ordination compounds
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Write the general formula of monohaloalkanes
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Give the preparation of aryl halides by Sandmeyer’s reaction
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Why?
Explain the mechanism of SN1 and SN2 reactions
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Butane 2-ol is a chiral molecule and optically active
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What are dextrorotatory and laevorotatory substance?
What is a racemic mixture and racemisation?
Racemic mixture is optically inactive
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What are enantiomers?
What is retention and inversion?
SN1 reactions of optically active alkyl halides are accompanied by racemisation
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Explain dehydrohalogenation reaction with an example
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Explain Wurtz reaction with an example
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Give reasons
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Explain Wurtz-Fittig reaction with an example
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Chloroform is stored in closed dark coloured bottles
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Write the structure of propane-1, 2, 3-triol
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Explain the mechanism of hydration of alkenes to alcohols
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Boiling points of alcohols are higher than other classes of organic compounds like hydrocarbons,
ethers, haloalkanes of comparable molecular masses
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Alcohols are soluble in water
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What is the effect of electron donating substituent on acidity of alcohols?
What is Lucas reagent? How would you distinguish 10, 20 and 30 alcohols by using Lucas reagent?
Explain the mechanism of dehydration of ethanol to ethane
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What is denaturation of alcohols?
How do you classify the phenols? Explain with an example
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Give reason
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How do you prepare aspirin from salicylic acid?
Electrophilic substitution reaction of phenol occurs at ortho and para position
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How do you prepare picric acid from phenol?
Explain Kolbe’s reaction
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Explain Friedel-Crafts alkylation of anisole
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Anisole undergo electrophilic substitution reaction at o and p-position
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Aldehydes and Ketones
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Explain Rosenmund reduction with an example
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Explain Gatterman-Koch reaction
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MOBILE- 7829051001
RANJAN R K ( MSc Bed)
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Aldehydes are generally more reactive than ketones for nucleophillic addition reactions
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How do aldehydes and ketones react with HCN?
What are acetals and hemiacetal?
How do aldehydes and ketones react with Hydrazine?
What is the clemmensen reduction? Give an example
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Write the composition of Tollen’s reagent and Fehling’s solution
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What is cross aldol or mixed aldol condensation?
What is cannizzaro’s reaction? Give an example
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Explain the acidic strength of formic acid, acetic acid and benzoic acid
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What is decarboxylation reaction?
What is Hell-Volhard_Zelinsky reaction? Give an example
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Why?
Explain bromination of benzoic acid with equation
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Explain the structure of amines
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How would you prepare amine by Gabriels phthalimide synthesis? Give equation
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Explain the basic character of amines
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What is carbyl amine reaction?
What is Hinsberg reagent? How do you distinguish between 10, 20 and 30 amines by it?
How do you convert aniline into p-nitroaniline?
Aniline does not undergo Friedel-Craft’s reaction
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What is sand meyer’s reaction?
Explain Gatterman reaction?
What are coupling reaction?
Biomolecules
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RANJAN R K ( MSc Bed)
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Explain D and L configuration
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Give the difference between Strach and cellulose
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Mention the impotance of carbohydrates
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What are essential and non-essential amino acids? Give an example
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What is peptide bond and how is it formed?
Write the formula to calculate the number of peptide bonds
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What are nucleosides and nucleotides?
Give the difference between DNA and RNA
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What are hormones?
Give the functions of the following hormones a) Insulin b) Thyroxine c) Steroid
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Write the structures of hetrocyclic bases
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Polymers
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Explain the classification of polymers on the basis of a) source, b) Structure c) mode of
polymerization and d) Intermolecular forces
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Explain free radical mechanism of addition polymerization
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What are homo and co-polymers? Give examples
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How do you prepare a) Teflon b) PAN c) Buna-S d) Nylon-6 e) Nylon -6,6 f) Buna- N
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Write the partial structure of polymers in the chapter
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What are biodegradable and non-biodegradable polymers? Give examples
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Give the preparation of PHBV
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What is chemotherapy?
Explain the classification of drugs
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Give the functions of histamine
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MOBILE- 7829051001
RANJAN R K ( MSc Bed)
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Explain the types of analgesis
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What are antimicrobials? Give examples
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What are antifertility drugs? Give examples
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What are food preservatives and antioxidants? Give examples
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Give the difference between soaps and detergents
Title: Important questions of chemistry
Description: This is chemistry important questions for 2nd year students, those who want to study well and get good marks, this pdf will help you to score well
Description: This is chemistry important questions for 2nd year students, those who want to study well and get good marks, this pdf will help you to score well