ISC (Commerce)
ISC (Arts)
ISC (Science)
Academic Year: 2016-2017
Date & Time: 20th March 2017, 2:00 pm
Duration: 3h
Advertisements
- Attempt all questions in Part I.
- Attempt six questions from Part II.
- Choosing two questions from section A ,
two from Section B and two from Section C.
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(iodoform, acetaldehyde, positive, greater, acidic, acetone, disaccharide, negative, increases, glucose, decreases, chloroform, polysaccharide, lactose, lesser, basic, cationic hydrolysis, anionic hydrolysis)
Calcium acetate on heating gives ________ which gives _______ on heating with iodine and sodium hydroxide solution.
Chapter: [0.057] Common ion effect
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(iodoform, acetaldehyde, positive, greater, acidic, acetone, disaccharide, negative, increases, glucose, decreases, chloroform, polysaccharide, lactose, lesser, basic, cationic hydrolysis, anionic hydrolysis)
On dilution of a solution, its specific conductance ________ while its equivalent conductance ________.
Chapter: [0.064] Electrolytic conductance
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(iodoform, acetaldehyde, positive, greater, acidic, acetone, disaccharide, negative, increases, glucose, decreases, chloroform, polysaccharide, lactose, lesser, basic, cationic hydrolysis, anionic hydrolysis)
Sucrose is a _________ and yields upon hydrolysis, a mixture of ________ and fructose.
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(iodoform, acetaldehyde, positive, greater, acidic, acetone, disaccharide, negative, increases, glucose, decreases, chloroform, polysaccharide, lactose, lesser, basic, cationic hydrolysis, anionic hydrolysis)
More _______ the standard reduction potential of a substance, the ______ is its ability to displace hydrogen from acids.
Chapter: [0.062] Galvanic cells, mechanism of current production in a galvanic cell;
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(iodoform, acetaldehyde, positive, greater, acidic, acetone, disaccharide, negative, increases, glucose, decreases, chloroform, polysaccharide, lactose, lesser, basic, cationic hydrolysis, anionic hydrolysis)
An aqueous solution of CH3COONa is ________ due to ______.
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
Complete the following statement by selecting the correct alternative from the choices given:
In a face-centered cubic lattice, atom (A) occupies the comer positions and atom (B) occupies the face centre positions. If one atom of (B) is missing from one of the face-centered points, the formula of the compound is:
A2B5
A2B3
AB2
A2B
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Complete the following statement by selecting the correct alternative from the choices given:
The half-life period of a first-order reaction is 20 minutes. The time required for the concentration of the reactant to change from 0.16 M to 0.02 M is:
80 minutes
60 minutes
40 minutes
20 minutes
Chapter: [0.0301] Order of a reaction
Complete the following statement by selecting the correct alternative from the choices given:
For a spontaneous reaction ΔG° and E° cell will be respectively:
-ve and +ve
+ve and -ve
+ve and +ve
-ve and -ve
Chapter: [0.062] Galvanic cells, mechanism of current production in a galvanic cell;
Complete the following statement by selecting the correct alternative from the choices given:
The conjugate acid of `"HPO"_4^(2-)` is :
H3PO3
H3PO4
`"H"_2"PO"_4^-`
`"PO"_4^(3-)`
Chapter: [0.051] Arrhenius, Brönsted-Lowry and Lewis concept of acids and bases
Complete the following statement by selecting the correct alternative from the choices given:
The polymer formed by the condensation of hexamethylenediamine and adipic acid is:
Teflon
Bakelite
Dacron
Nylon-66
Chapter: [0.16] Polymers
Answer the following question:
Why the freezing point depression (ΔTf) of 0.4 M NaCl solution is nearly twice than that of 0.4 M glucose solution?
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
Answer the following question:
Identify the order of reaction from each of the following units of rate constant (k):
(i) mol L-1 sec-1
(ii) mol-1 L sec-1
Chapter: [0.0301] Order of a reaction
Specific conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm-1. Calculate its molar conductivity.
Chapter: [0.064] Electrolytic conductance
Answer the following question:
Name the order of reaction which proceeds with a uniform rate throughout.
Chapter: [0.0301] Order of a reaction
Answer the following question:
What are the products formed when phenol and nitrobenzene are treated separately with a mixture of concentrated sulphuric acid and concentrated nitric acid?
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Match the following:
| Column A | Column B |
| (i) Diazotisation | (a) Bakelite |
| (ii) Argentite | (b) Nernst equation |
| (iii) Thermosetting plastics | (c) Aniline |
| (iv) Electrochemical cell | (d) Ethylenediamine |
| (v) Bidentate ligand | (e) Froth floatation process |
Chapter: [0.16] Polymers
Determine the freezing point of a solution containing 0.625 g of glucose (C6H12O6) dissolved in 102.8 g of water.
(Freezing point of water = 273 K, Kf for water = 1.87 K kg mol-1, at. wt. C = 12, H = 1, O = 16)
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
A 0.15 M aqueous solution of KCl exerts an osmotic pressure of 6.8 atm at 310 K. Calculate the degree of dissociation of KCl. (R = 0.0821 Lit. atm K-1 mol-1).
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
A solution containing 8.44 g of sucrose in 100 g of water has a vapour pressure 4.56 mm of Hg at 273 K. If the vapour pressure of pure water is 4.58 mm of Hg at the same temperature, calculate the molecular weight of sucrose.
Chapter: [0.011000000000000001] Raoult's law and colligative properties
When ammonium chloride and ammonium hydroxide are added to a solution containing both Al3+ and Ca2+ ions, which ion is precipitated first and why?
Chapter: [0.057] Common ion effect
A solution of potassium chloride has no effect on litmus whereas, a solution of zinc chloride turns the blue litmus red. Give a reason.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
How many sodium ions and chloride ions are present in a unit cell of sodium chloride crystal?
Chapter: [0.057] Common ion effect
Lead sulphide has a face-centered cubic crystal structure. If the edge length of the unit cell of lead sulphide is 495 pm, calculate the density of the crystal.
(at. wt. of Pb = 207, S = 32)
Chapter: [0.09] Preparation/ Manufacture, Properties and Uses of Compounds of Groups 16, 17, – Ozone, Sulphur Dioxide, Sulphuric Acid, Hydrochloric Acid
For the reaction: \[\ce{2H2 + 2NO ⇌ 2H2O + N2}\] , the following rate data was obtained:
| S.No | [NO] mol L-1 | [H2] mol L-1 | Rate: mol L-1sec-1 |
| 1 | 0.40 | 0.40 | 4.6 × 10-3 |
| 2 | 0.80 | 0.40 | 18.4 × 10-3 |
| 3 | 0.40 | 0.80 | 9.2 × 10-3 |
Calculate the following:
(1) The overall order of a reaction.
(2) The rate law.
(3) The value of rate constant (k).
Chapter: [0.0301] Order of a reaction
The following electrochemical cell is set up at 298 K:
`"Zn"//"Zn"^(2+)("aq")(1"M")////"Cu"^(2+)("aq")(1"M")//"Cu"`
Given`-> "E"_("Zn"^(2+)//"2n")^0 = -0.761"V", "E"_("Cu"^(2+)//"Cu")^0 = +0.339"V"`
Write the cell reaction.
Chapter: [0.062] Galvanic cells, mechanism of current production in a galvanic cell;
The following electrochemical cell is set up at 298 K:
`"Zn"//"Zn"^(2+)("aq")(1"M")////"Cu"^(2+)("aq")(1"M")//"Cu"`
Given`-> "E"_("Zn"^(2+)//"2n")^0 = -0.761"V", "E"_("Cu"^(2+)//"Cu")^0 = +0.339"V"`
Calculate the emf and free energy change at 298 K.
Chapter: [0.062] Galvanic cells, mechanism of current production in a galvanic cell;
Advertisements
Answer the following:
What is the effect of temperature on the ionic product of water (Kw)?
Chapter: [0.0304] Effect of temperature on the rate constant of a reaction
Answer the following:
What happens to the ionic product of water (Kw) if some acid is added to it?
Chapter: [0.0304] Effect of temperature on the rate constant of a reaction
Frenkel defect does not change the density of the ionic crystal whereas, Schottky defect lowers the density of ionic crystal. Give a reason;
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Name the law or principle to which the following observation confirm:
When water is added to a 1.0 M aqueous solution of acetic acid, the number of hydrogen ion (H+) increases.
Chapter: [0.055999999999999994] Ostwald’s dilution law and its derivation
Name the law or principle to which the following observations confirm :
When 9650 coulombs of electricity is passed through a solution of copper sulphate, 3.175 g of copper is deposited on the cathode (at. wt. of Cu = 63.5).
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Name the law or principle to which the following observations confirm:
When ammonium chloride is added to a solution of ammonium hydroxide, the concentration of hydroxyl ion decreases.
Chapter: [0.057] Common ion effect
What is the difference between the order of a reaction and the molecularity of a reaction?
Chapter: [0.0301] Order of a reaction
Explain why high pressure is required in the manufacture of sulphur trioxide by the contact process. State the law or principle used.
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
Calculate the equilibrium constant (Kc) for the formation of NH3 in the following reaction:
\[\ce{N2(g) + 3H2(g) ⇌ 2NH3(g)}\]
At equilibrium, the concentration of NH3, H2 and N2 are 1.2 × 10-2, 3.0 × 10-2 and 1.5 × 10-2 M respectively.
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
Explain the following:
Hydrolysis of ester (ethyl acetate) begins slowly but becomes fast after some time.
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
Explain the following:
The pH value of acetic acid increases on the addition of a few drops of sodium acetate.
Chapter: [0.057] Common ion effect
Using IUPAC norms write the formulae for Potassium trioxalatoaluminate(III)
Chapter: [0.07] Coordination Compounds
Write the formula of the following compounds:
Hexaaquairon (II) sulphate.
Chapter: [0.07] Coordination Compounds
Name the type of isomerism shown by the following compounds:
[CU(NH3)4] [PtCl4] and [Pt(NH3)4] [CuCl4]
Chapter: [0.07] Coordination Compounds
Name the type of isomerism shown by the following compounds:
[Co(Pn)2Cl2]+ and [Co(en)2Cl2]+
Chapter: [0.07] Coordination Compounds
For the coordination complex ion [Co(NH3)6]3+
Give the IUPAC name of the complexion.
Chapter: [0.057] Common ion effect
For the coordination complex ion [Co(NH3)6]3+
What is the oxidation number of cobalt in the complexion?
Chapter: [0.057] Common ion effect
For the coordination complex ion [Co(NH3)6]3+
State the type of hybridisation of the complexion.
Chapter: [0.057] Common ion effect
For the coordination complex ion [Co(NH3)6]3+
State the magnetic behaviour of the complexion.
Chapter: [0.057] Common ion effect
Give balanced equation for the following reaction:
Potassium permanganate is heated with concentrated hydrochloric acid.
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
Give balanced equation for the following reaction:
Lead sulphide is heated with hydrogen peroxide.
Chapter: [0.09] Preparation/ Manufacture, Properties and Uses of Compounds of Groups 16, 17, – Ozone, Sulphur Dioxide, Sulphuric Acid, Hydrochloric Acid
Give balanced equation for the following reaction:
Ozone is treated with potassium iodide solution.
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
Discuss the theory involved in the manufacture of sulphuric acid by the contact process.
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
Advertisements
What are the types of hybridisation of iodine in interhalogen compounds IF3, IF5 and IF7, respectively?
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
Draw the structure of xenon hexafluoride (XeF6) molecule and state the hybridisation of the central atom.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
Give the balanced equations for the conversion of argentite (Ag2S) to metallic silver.
Chapter: [0.125] Conversion of one alcohol into another
How can the following conversion be brought about:
Acetaldehyde to propan-2-ol.
Chapter: [0.131] Carbonyl compounds
How can the following conversion be brought about:
Nitrobenzene to p-aminoazobenzene.
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
How can the following conversion be brought about:
Acetic acid to methylamine.
Chapter: [0.057] Common ion effect
How can the following conversion be brought about:
Aniline to benzene
Chapter: [0.114] Chlorobenzene
How will you distinguish between primary, secondary and tertiary amines by Hinsberg’s test?
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Why do alcohols possess higher boiling points as compared to those of corresponding alkanes?
Chapter: [0.124] Classification, general formulae, structure and nomenclature
Give balanced equations for the following reaction :
Methyl magnesium bromide with ethyl alcohol.
Chapter: [0.115] Preparation, properties, and uses of the following
Identify the compounds A, B and C:
\[\ce{C6H5COOH ->[PCl5] A ->[H2 - Pd/BaSO4] B ->[KCN alc.][distil.] C}\]
Chapter: [0.07] Coordination Compounds
Identify the compounds A, B and C :
\[\ce{H - C ≡ C - H ->[H2O][dil.H2SO4 + HgSO4] A ->[H2][(Nil)] B ->[140°][cone. H2SO4] C}\]
Chapter: [0.07] Coordination Compounds
Give balanced equation for the following name reaction:
Friedel-Crafts reaction (alkylation)
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Give balance equation for the following name reaction:
Williamson’s synthesis
Chapter: [0.132] Ethers
Give a balanced equation for the following name reaction:
Aldol condensation
Chapter: [0.131] Carbonyl compounds
Give the chemical test to distinguish:
Ethyl alcohol and sec-propyl alcohol
Chapter: [0.115] Preparation, properties, and uses of the following
Give the chemical test to distinguish:
Acetaldehyde and acetic acid
Chapter: [0.115] Preparation, properties, and uses of the following
Deficiency of which vitamin causes the following diseases of Scurvy.
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Deficiency of which vitamin causes the following diseases of Night blindness
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Write two differences between globular and fibrous proteins.
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
An aliphatic unsaturated hydrocarbon (A) when treated with HgSO4/H2SO4 yields a compound (B) having molecular formula C3H6O. (B) on oxidation with concentrated HNO3 gives two compounds (C) and (D). Compound (C), when treated with PCl5, gives compound (E). (E) when reacts with ethanol gives a sweet-smelling liquid (F). Compound (F) is also formed when (C) reacts with ethanol in the presence of concentrated H2SO4.
(i) Identify the compounds A, B, C, D, E and F.
(ii) Give the chemical equation for the reaction of (C) with chlorine in the presence of red phosphorus and name the reaction.
Chapter: [0.11199999999999999] The nomenclature of aliphatic compounds containing halogen atom
Answer the following:
What is the common name of the polymer obtained by the polymerization of caprolactam? Is it an addition polymer or condensation polymer?
Chapter: [0.16] Polymers
Answer the following:
Name the two organic compounds which have the same molecular formula C2H6O. Will they react with PCl5? If they react, what are the products formed?
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Give balanced equations for the following reaction :
Methyl magnesium bromide with ethyl alcohol.
Chapter: [0.115] Preparation, properties, and uses of the following
Give balanced equations for the following reactions:
Acetic anhydride with phosphorus pentachloride.
Chapter: [0.114] Chlorobenzene
Give balanced equations for the following reaction:
Acetaldehyde with hydroxylamine.
Chapter: [0.114] Chlorobenzene
Submit Question Paper
Help us maintain new question papers on Shaalaa.com, so we can continue to help studentsonly jpg, png and pdf files
CISCE previous year question papers Class 12 Chemistry (Theory) with solutions 2016 - 2017
Previous year Question paper for CISCE Class 12 -2017 is solved by experts. Solved question papers gives you the chance to check yourself after your mock test.
By referring the question paper Solutions for Chemistry (Theory), you can scale your preparation level and work on your weak areas. It will also help the candidates in developing the time-management skills. Practice makes perfect, and there is no better way to practice than to attempt previous year question paper solutions of CISCE Class 12.
How CISCE Class 12 Question Paper solutions Help Students ?
• Question paper solutions for Chemistry (Theory) will helps students to prepare for exam.
• Question paper with answer will boost students confidence in exam time and also give you an idea About the important questions and topics to be prepared for the board exam.
• For finding solution of question papers no need to refer so multiple sources like textbook or guides.
