ISC (Commerce)
ISC (Arts)
ISC (Science)
Academic Year: 2014-2015
Date: March 2015
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Question 1 is Compulsory
Answer Any 2 Question From Question 2 to Question 4
Answer Any 2 From Question 5 to Question 7
Answer Any 2 From Question 8 to Question 10
The more _____ the standard reduction potential of a metal, the ____ is its ability to displace hydrogen from acids.
Chapter: [0.062] Galvanic cells, mechanism of current production in a galvanic cell;
Both ccp and hcp are _________ packings and occupy. about_______ % of the available space.
Chapter: [0.02] States of Matters: Structure and Properties Solid State
The solubility of silver chloride _______ in the presence of sodium: chloride because of ___________
Chapter: [0.055] Solubility product and its applications
Benzaldehyde undergoes ________ reaction on treatment with concentrated sodium hydroxide because it has _______ atom
Chapter: [0.113] Preparation, properties, uses of haloalkanes
The transition metals show _________ character because of the presence of unpaired· electrons and Cu+ is ____________ because of its electronic configuration is [Ar]3d10
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
The molal freezing point constant of water is 1·86 K kg mol-1. Therefore, the freezing point of 0·1 M NaCl solution in water is expected to be:
1) -1.86°C
2) -0.372 °C
3) -0.186 °C
4) +0.372 °C
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
For a first-order reaction, the rate constant for decomposition of `N_2O_5` is `6 xx 10^(-4) sec^(-1)`.The half-life period for the decomposition in seconds is:
1) 11·55
2) 115·5
3) 1155
4) 1·155
Chapter: [0.0301] Order of a reaction
When acetaldehyde is treated With Grignard reagent, followed by hydrolysiS-the product formed is:
1) Primary alcohol
2) Secondary alcohol
3) Carboxylic acid
4) Tertiary alcohol
Chapter: [0.142] Acid derivatives
The geometry of XeF6 molecule and_ the hybridization of Xe atom in the molecule.is:
1) Distorted octahedral and `sp^3d^3`
2) Square planar and `sp^3d^2`
3) Pyramidal and `sp^3`
4)Octahedral and `sp^3d^3`
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
In the complexes `[Fe(CN)_6]^(3-)` and `[pt(en) (H_2O)_2(NO_2 (Cl)^(2+)]``the respective oxidation numbers of central metal atoms are
1) +3 and +4
2) +6 and + 4
3) +6 and +3
4) +3 and + 3
Chapter: [0.02] States of Matters: Structure and Properties Solid State
What is the effect of temperature on the ionic, product of water? How will it change the pH value of a neutral solution?
Chapter: [0.0304] Effect of temperature on the rate constant of a reaction
How many hours does it take to reduce 3 moles of `Fe^(3+)`to `Fe^(2+)` with 2.0 A Current intensity?
Chapter: [0.015] Normality, molality
How is urea prepared by Wohler synthesis?
Chapter: [0.142] Acid derivatives
Two liquids A and B form type II non-ideal solution which shows a minimum in its temperature -mole fraction plot (T -x diagram). Can the two liquids be completely separated by fractional distillation?
Chapter: [0.015] Normality, molality
The aqueous solution of sodium acetate is basic. Explain.
Chapter: [0.057] Common ion effect
Match the following:
| 1 | Disaccharide | a | Lucas reagent |
| 2 | Carbylamine | b | Condensation polymer |
| 3 | Dacron | c | Obnoxious smell |
| 4 | Low spin complex `d^2sp^3` | d | Sucrose |
| 5 | Anhydrous `ZnCl_2 + conc.HCl` | e | Hexaamminecobalt(III)ion |
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
A solution containing 0·5 g of KCl dissolves in 100 g of water and freezes at -0·24°C. Calculate the degree of dissociation of the salt. (Kf for water= 1.86 °C) Atomic weights [K = 39, Cl = 35·5]
Chapter: [0.015] Normality, molality
If 1·71 g of sugar (molar mass = 342) are dissolved in 500 ml of an aqueous solution at 300 K, what will be its osmotic pressure?
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
0·70g of an organic compound, when dissolved in 32g of acetone, produces an elevation of 0·25°C in the boiling point. Calculate the molecular mass of the organic compound (Kb for acetone = 1·72 K kg `mol^(-1)`).
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
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What is the difference between the order of a reaction and the molecularity of a reaction?
Chapter: [0.0301] Order of a reaction
A substance decomposes by following first order kinetics. If 50% of the compound is decomposed in 120 minutes, how long will it take for 90% of the compound to decompose?
Chapter: [0.0301] Order of a reaction
Name the crystal structure of the copper metal.
Chapter: [0.07] Coordination Compounds
Chromium metal crystallises with a body centred cubic lattice. The edge length of the unit cell is found to be 287 pm. Calculate the atomic radius: What would be the density of chromium in g/cm3? (atomic mass of Cr = 52 ·99)
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Why does sodium chloride on heating with sodium vapours acquire yellow colour?
Chapter: [0.02] States of Matters: Structure and Properties Solid State
The equilibrium constant for the reaction:
`N_(2(g)) + 3H_(2(g)) ⇌ 2NH_(3(g)) at 715 K, is 6.0 xx 10^(-2)`
If, in a particular reaction, there ate 0·25 mol L-1 of H2. and 0·06 mol L-1 of NH3 present, calculate the concentration of N2 at equilibrium
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
Calculate the concentration of OH- ions in solution when [H+] = 6.2 x 10-2L mol L-1.
Chapter: [0.031] Effect of concentration of reactants on the rate of a reaction
State the Le Chatelier's principle.
Chapter: [0.042] Le Chatelier’s Principle and its applications to chemical equilibria
For a crystal of sodium chloride, state:
1) The type of lattice in which it crystallises
2) The coordina~ion number of each sodium ion and chloride ion in the crystal lattice.
3) The number of sodium ions and chloride ions present in a unit cell of sodium chloride.
4) The structural arrangement of the sodium chloride crystaL
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Consider the following reaction:
`N_2O_(4(g)) + Heat ⇌ 2NO_(2(g))`
How is the Composition of equilibrium mixture affected by:
1) a change in temperature
2) a change in pressure
3) change in concentration of N2O4
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
The specific conductance of a 0.01 M solution of acetic acid at +98 K is 1.65 x 10-4 ohm cm-1. The molar conductance at infinite dilution for H+ ion and CH3COO- ion is 349.1 ohm-1 cm2mol-1 and 40.9 ohm-1 cm2mol-1 respectively.
Calculate:
1) Molar conductance of the solution.
2) The degree of dissociation of CH3COOH.
3) A dissociation constant for acetic acid
Chapter: [0.064] Electrolytic conductance [0.064] Electrolytic conductance
Calculate the e.m.f of the following cell reaction at 298 K:
`Mg_(s) + Cu^(2+) (0.0001 M) -> Mg^(2+) (0.0001M) + Cu_(s)`
The standard potential `(E^@)`of the cell is 2.71 V
Chapter: [0.062] Galvanic cells, mechanism of current production in a galvanic cell;
The solubility product (Ksp) of BaSO4 is 1.5 X 10-9.Calculate the solubility of barium sulphate in pure water and in 0.1 M BaCl2.
Chapter: [0.011000000000000001] Raoult's law and colligative properties
When NH4 Cl and NH4OH are added to a solution containing both, Fe3+ and Ca2+ ions, which ion is precipitated first and why?
Chapter: [0.054000000000000006] Buffer solutions
Dissociation of H2S is suppressed in acidic medium.
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
Write the IUPAC names of the following coordination compounds:
[Cr(NH3)4(H2O)2]Cl3
Chapter: [0.07] Coordination Compounds
Write the IUPAC names of the following coordination compounds:
`[PtCl_2(NH_3)_4][PtCl_4]`
Chapter: [0.07] Coordination Compounds
State the hybridization and magnetic property of [Fe(CN)6]3- ion according to the valence bond theory.
Chapter: [0.07] Coordination Compounds
What type of isomers are `[Co(NH_3)_5Br]SO_4`and `[Co(NH_3)_5SO_4]Br`?. Give a chemical test to distinguish between them.
Chapter: [0.07] Coordination Compounds
Write the structures of optical isomers of the complex ion `[Co(en)_2Cl_2]^+`
Chapter: [0.07] Coordination Compounds
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Give balanced chemical equations for Fluorine is passed through cold, dilute NaOH solution
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
Give balanced chemical equations for Hydrogen peroxide is treated with an acidified KMnO4 solution.
Chapter: [0.09] Preparation/ Manufacture, Properties and Uses of Compounds of Groups 16, 17, – Ozone, Sulphur Dioxide, Sulphuric Acid, Hydrochloric Acid
Give balanced chemical equations for Sulphuric acid is treated with hydrogen sulphide
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18 [0.09] Preparation/ Manufacture, Properties and Uses of Compounds of Groups 16, 17, – Ozone, Sulphur Dioxide, Sulphuric Acid, Hydrochloric Acid
Draw the structure of xenon tetrafluoride molecule and state the hybridization of the central atom and the geometry of the molecule.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
Name the important ore of silver. Write all the steps and reactions involved in the Cyanide process for the extraction of silver from its ore.
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Why do transition metal ions possess a great tendency to form complexes?
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
The paramagnetic character in-3d-transition series elements increases-: up to Mn and then decreases.
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
How can the following conversions be brought about
Glycerol to formic acid
Chapter: [0.141] Carboxylic acids
How can the following conversions be brought about:
Chlorobenzene to phenol
Chapter: [0.141] Carboxylic acids
How can the following conversions be brought about:
Diethyl ether to ethanol
Chapter: [0.132] Ethers
How can the following conversions be brought about:
Phenol to aniline.
Chapter: [0.142] Acid derivatives
How is iodoform prepared from ethanol? Give balanced equation.
Chapter: [0.115] Preparation, properties, and uses of the following
What.will be the product fonned when chlorobenzene is heated with sodium metal in the presence of dry ether?
Chapter: [0.124] Classification, general formulae, structure and nomenclature [0.132] Ethers
Identify the compounds A, B, C, D, E, and F:
\[\ce{CH3COCH3->[Conc.HNO3][(O)]A}\]
\[\ce{->[SOCl2]B}\]
\[\ce{->[NH3]C}\]
\[\ce{->[LiAlH4]D}\]
\[\ce{->[HNO2]E}\]
\[\ce{->[CH3COCl]F}\]
Chapter: [0.07] Coordination Compounds
Write the equation involved in the following reaction:
Reimer-Tiemann reaction
Chapter: [0.12300000000000001] Distinction between primary, secondary and tertiary alcohols
Write the chemical equations to illustrate the following name reactions : Rosenmund reduction
Chapter: [0.142] Acid derivatives
Give ba1anced equations for the following name reactions:
Hoffmann’s degradation reaction
Chapter: [0.142] Acid derivatives
Give of chemical test to distinguish between the following pairs of compounds:
Ethylamine and diethylamine
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Give one chemical test to distinguish between the following pair of compounds:
Acetaldehyde and benzaldehyde
Chapter: [0.131] Carbonyl compounds
Arrange the following compounds in the ascending order of their basic strength and give reasons for your answer:
Methylamine, Aniline, Ethylamine, Diethyl ether
Chapter: [0.142] Acid derivatives
Name the monomers and the type of polymerization in each of the following polymers:
Polyester
Chapter: [0.16] Polymers
Name the monomers and the type of polymerization in each of the following polymers:
Bakelite
Chapter: [0.16] Polymers
An organic compound A with molecular formula C2H7N on reaction with nitrous acid gives a compound B. Bon controlled oxidation gives compound C. C reduces Tollen's -reagent to give silver mirror and D. B reacts with D in the presence of concentrated sulphuric acid to give sweet smelling compound E. Identify A, B, C, D. and E. Give the reaction of C with ammonia
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Give balanced equations for the following reactions:
How.will you Convert ethylamine to methylamine?
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Give balanced equations for the following reaction:
What is the effect of denaturation on the structure of proteins?·
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Give balanced equations for the following reactions:
Name the nitrogen base residues present in DNA
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Give balanced equations for the following reactions:
Aniline is treated with nitrous acid and HCl at the low temperature
Chapter: [0.114] Chlorobenzene
Give balanced equations for the following reactions:
Acetyl chloride is treated with ethyl alcohol.
Chapter: [0.142] Acid derivatives
Give balanced equations for the following reactions:
Formaldehyde is treated with ammonia.
Chapter: [0.131] Carbonyl compounds
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