Sr Inter Chemistry Imp Qus

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SENIOR INTER CHEMISTRY Important Questions

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1. SOLID STATE (4 Marks) Short Answer type Questions

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1.

Derive Bragg's equation.

2.

Calculate the efficiency of packing in case of a metal of body - centered cubic crystal.

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(Note: Also learn F.C.C.) 3.

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Describe the two main types of semi conductors and contrast their conduction mechanism.

Very Short Answer type Questions

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1.

What are "Schottky defects" in crystalline solids?

2.

What are "Frenkel defects" in crystalline solids?

3.

How do you distinguish between crystal lattice and unit cell?

4.

What are f - centers?

5.

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What is "coordination number"? Give this number in a (a) cubic close - pack structure (b) B.C.C. structure.

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6.

What is a) Ferromagnetism

b) Antiferromagnetism?

7.

What is a) Paramagnetism

b) Ferrimagnetism?

8.

What type of semi conductor is formed when

a)

"Ge' doped with "In"

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b) "Si" doped with "B"

2. SOLUTIONS (6 Marks)

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Short Answer type Questions 1.

State Roult's law. Calculate the vapour pressure of a solution containing 9 g of glucose in 162 g of water at 293 K. The vapour pressure of water at 293 K is 17.535 mm Hg.

2.

Calculate a) Molality b) Molarity and c) Mole fraction of KI if the density of 20% (mass/ mass) aqueous KI is 1.202 gm L-1.

3. 4.

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State Henry's law. Calculate Henry's law constant if the solubility of H2S in water at STP is 0.195 m.

Define mole fraction. Calculate the mole fraction of H2SO4 in a solution containing 98% H2SO4 by mass.

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Define osmotic pressure. Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1 g of polymer of molar mass 1,85,000 in 450 ml of water at 37°C.

6.

What is "Cryoscopic constant"? Calculate the mass of C6H8O6 to be dissolved in 75 g of acetic acid to lower its melting point by 1.5°C (kf = 3.9 K kg mol-1).

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Very Short Answer type Questions 1.

What is "Ebullioscopic constant?"

2.

What are "isotonic solutions?"

3.

What is an "ideal solution?"

4.

What is ppm of a solution?

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3. ELECTRO CHEMISTRY AND CHEMICAL KINETICS (10 Marks)

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Long Answer type Questions 1.

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Give a detailed account of the collision theory of reaction rates of bimolecular reactions.

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Short Answer type Questions 1.

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What is "order" of a reaction? How is it different from the molecularity of a reaction? Give one example for 1st and 2nd order reactions?

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2.

What is "half life" of a reaction? A first order reaction is found to have a rate constant K = 5.5 × 10-14 s-1. Find the half - life of the reaction.

3.

State & explain "Kohlrausch's law" of independent migration of ions. Give its applications.

4.

What is electrolysis? State the "Faraday's laws" of electrolysis?

5.

State & explain "Nernst equation". Calculate the emf of the cell at 25°C.

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CrCr+3 (0.1 M)  Fe+2 (0.01 M) Fe

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(E°Cr+3 Cr = -0.74 V, E° Fe+2 Fe = -0.44 V)

Very Short Answer type Questions 1.

What are "pseudo first order reactions? Give one example.

2.

What are the units of 0th, 1st, 2nd, 3rd order reactions?

3. 4. 5.

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What is "standard Hydrogen electrode"? How is Gibbs energy (G) related to the cell emf (E) mathematically? Give the products obtained at the cathode and anode when aqueous solution of K2SO4 is electrolysed.

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What is a "fuel cell"?

7.

What is "metallic corrosion"? Give one example.

8.

What are "primary batteries" and "secondary batteries"?

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4. SURFACE CHEMISTRY (4 Marks)

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Short Answer type Questions 1.

What are different types of adsorption? Give any 4 differences between characteristics of these different types.

2.

What is catalysis? How is catalysis classified? Give 2 examples for each type of catalysis?

3.

What are emulsions? How are they classified? Describe any 2 applications of emulsions?

4.

Explain cleansing action of soap.

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Very Short Answer type Questions

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1.

Define "gold number"?

2.

What is "Tyndall effect"?

3.

What is "Brownian movement"?

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4.

State "Hardy - Schulze rule"?

5.

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Name the dispersed phase & dispersion medium present in a) smoke b) milk.

6.

What are "micelles"? Give one example.

7.

What are "Lyophilic colloids" and "Lyophobic colloids"?

8.

Sky appears blue in the colour. Explain.

9.

Define "flocculation value".

10.

What is "emulsifying agent"?

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5. GENERAL PRINCIPLES OF METALLURGY (6 Marks)

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Short Answer type Questions 1.

Giving examples to differentiate "roasting" and calcination?

2.

Explain the purification of sulphide ore by "Froth floation method"?

3.

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Write down the chemical reactions taking place in different zones in the blast furnace during the extraction of iron.

4.

How is Zn is extracted from Zinc blende?

5.

How is alumina separated from Silica in the bauxite ore associate with Silica?

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www.eenadupratibha.net Very Short Answer type Questions 1.

What is the role of Cryolite in the extraction of Al?

2.

What is the composition of alloys. a) Brass and

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b) German Silver

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3.

What is "Poling"?

4.

What are "Matte" and "Blister Copper"?

5.

What is "Flux"? Give 2 examples.

6.

What are "Gangue" and "Slag"?

7.

What is "Zone refining"?

8.

How is "Cast iron" different from "Pig iron"?

9.

What is the difference between "ore" and "mineral"?

10.

Give one use each of Zn, Cu, Fe and Al metals.

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6. p - BLOCK ELEMENTS (12 Marks)

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Short Answer type Questions 1.

How is ammonia manufactured by Haber's process.

2.

How is Nitric acid manufactured by Ostwald's process.

3.

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Describe the manufacture of H2SO4 by contact process.

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How is Cl2 obtained in the laboratory? How does it react with a) cold dil. NaOH and b) KI

5.

How is Cl2 prepared by electrolytic method?

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Explain its reactions with a) NaOH and 6.

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b) NH3 under different conditions.

How is Ozone prepared from Oxygen? Explain its reaction with a) PbS

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b) moist KI

c) Hg and

d) C2H4. Give equations.

7.

Explain the structures of a) XeF4 and

b) XeOF4.

8.

Explain the structures of a) XeF2 and

b) XeF6.

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Very Short Answer type Questions 1.

PH3 is weaker base than NH3. Explain.

2.

What is "allotropy"?

3. 4. 5.

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What is "inert pair effect"? NO is paramagnetic in gaseous state but diamagnetic in liquid and solid states. Why? Iron becomes passive in conc. HNO3. Why?

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PCl3 can act as an oxidising as well as reducing agent. Justify.

7.

SO2 can be used as anti-chlor. Explain.

8.

What is "tailing of mercury"? How is it removed?

9.

Why is H2O a liquid while H2S is a gas?

10.

H2O is neutral while H2S is acidic. Explain.

11.

Give the structures and the hybridisation of 'S' in SF4 & SF6.

12.

Electron gain enthalpy of F is less than Cl. Explain.

13.

HF is liquid while HCl is gas. Explain.

14.

Explain the strctures of ClF3 & BrF4.

15.

What are "interhalogen compounds"? Give 2 examples.

16.

Give 2 uses of Neon.

17.

Give 2 uses of Argon.

18.

In modern diving apparatus; a mixture of He and O is used. Why?

19.

Noble gases are inert. Explain.

20.

How are XeF2 and XeF4 are prepared?

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7. d - and f - BLOCK ELEMENTS & COORDINATION COMPOUNDS (6 Marks)

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Short Answer type Questions 1.

Explain Werner's theory of coordination compounds with suitable examples.

2.

What is "Lanthanide contraction"? Give the consequences of it.

3.

Using IUPAC names write the systematic names of the following.

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(a) [Co(NH3)6]Cl3

(b) [Pt(NH3)2Cl (NH2CH3)]Cl

(c) [Ti(H2O)6]+3 and

(d) [NiCl4]-2

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4.

Explain different types of isomerism exhibited by coordination compounds, giving one example for each type.

5.

Using IUPAC names write the formulae of the following.

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(a) Tetrahydrozincate (II)

(b) Hexaamine Cobalt (III) Sulphate

(c) Potassium Tetra Chloropalladate (II) and (d) Potassium Tri (oxalato) Chromate (II).

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Very Short Answer type Questions 1. 2.

Calcuate the 'spin only' magnetic moment of Fe+2 (aq.) ion.

How many moles of AgCl is precipitated when 1 mole of CoCl3 . 5 NH3 is treated with AgNO3 solution?

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CuSO4 . 5 H2O is blue in colour where as anhydrous CuSO4 is colourless. Why?

4.

What is "Misch metal"? Give its composition and uses.

5.

Zn+2 is diamagnetic where as Mn+2 is paramagnetic. Why?

6.

Aqueous Cu+2 ions are blue in colour where as aqueous Zn+2 ions are colourless. Why?

7.

What is an "alloy"? Give 2 examples of alloys.

8.

What is a "ligand"? Give one example each for neutral and ambidentate ligand.

9.

What is a "double salt"? Give one example.

10.

Permanganate titrations are carried out in the presence of sulphuric acid but not in presence of hydrochloric acid. Why?

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8. POLYMERS (4 Marks) Very Short Answer type Questions

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What is "PHBV"? How is it useful to man?

2.

What is "PDI"?

3.

What is "Vulcanization of rubber"?

4.

A polymer contains 10 molecules with molecular mass 10,000 and 10 molecules with molecular mass 1,00,000. Calculate number-average & weight average moelcular mass?

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5.

What are 'Elastomers" and "Fibres"?

6.

What are "Thermosetting" & "Thermoplastic polymers"?

7.

Write the names and structures of monomers of the following polymers a) Bakelite and b) Nylon 6, 6.

8.

Explain the difference between Buna - N and Buna - S?

9.

What are "homo polymers" & "co polymers"?

10.

What is Dacron? Mention the names and structures of the monomers present in it. Give equation for the formation of Dacron.

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9. BIOMOLECULES (4 Marks)

Short Answer type Questions 1.

Give the sources of the following vitamins and name of the diseases caused by their deficiency.

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i) A

ii) D

iii) E

iv) K

2.

What are "hormones"? Give the functions of different hormones in the body.

3.

Write a brief note on the structure of glucose.

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www.eenadupratibha.net Very Short Answer type Questions 1.

What are "anomers"?

2.

What is "Zwitter ion"? Give an example.

3.

What is "denaturation of proteins"?

4.

What is "peptide linkage"?

5.

What is the difference between nucleoside and nucleotide?

6.

What are "enzymes"?

7.

Why cannot vitamin C be stored in our body?

8.

Give the hydrolysis products of Sucrose, Maltose and Lactose.

9.

What is 'heredity"?

10.

What are amino acids? Classify them with one example each.

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10. CHEMISTRY IN EVERYDAY LIFE (4 Marks)

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Short Answer type Questions 1.

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Write short notes on a) Analgesics and b) Food preservatives.

2.

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Write short notes on a) Antibiotics

b) Artificial sweetening agents.

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Write short notes on a) Antiseptics and

b) Antioxidants in food.

4.

Short notes on a) Soaps b) Synthetic detergents.

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Very Short Answer type Questions 1.

What are "Antihistamines"? Give 2 examples.

2.

What are "Antacids"? Give 2 examples.

3.

What are "Tranquilizers?" Give 2 examples.

4.

What is "Tincture of iodine"? Give its uses.

5.

What is "Saponifacation"?

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11. HALO ALKANES AND HALOARENS (4 Marks)

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Short Answer type Questions 1.

Explain SN2 mechanism with one example.

2.

Define a) Enantiomers and

b) Racemic mixture.

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www.eenadupratibha.net Very Short Answer type Questions 1.

Write the isomers of C4H9Br.

2.

How is ethane converted to Bromoethane?

3.

Though Cl is electron withdrawing group, yet it is ortho-para-directing in electrophilic aromatic substitution. Why?

4.

What are "ambident nucleophiles"?

5.

What type of isomerism is exhibited by o, m and p - dichlorobenzenes?

6.

What is the criteria for "optical activity"?

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Give 2 examples of chiral molecules. 7.

Name the products if alkyl halides react with a) aq. KOH and

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b) Alc. KOH.

12. ORGANIC COMPOUNDS CONTAINING C, H and O (8 Marks)

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Short Answer type Questions

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1.

Explain i) Cannizzaro reaction and

2.

Explain the acidic nature of phenols and compare it with that of alcohols.

3.

Explain i) Reimer - Tiemann reaction and

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ii) Decarboxylation.

b) Nitration of Anisole and

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c) Fridel - Craft's alkylation & acylation of Anisole. 5.

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Write equations of the reaction a) Halogenation of Anisole Explain

a) Aldol

b) Oxime

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ii) Kolbe's reaction.

C) Cyanohydrin and

d) Acetal.

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Very Short Answer type Questions 1.

What is "Aspirin"? How is it prepared? Give its use.

2.

Explain "Williamson's Ether synthesis".

3.

What is "Denaturation of Alcohols?

4.

How do you distinguish acetophenone and benzophenone?

5.

Compare the acidic strength of CH3COOH, ClCH2COOH, C6H5COOH and C6H5OH.

6.

What is Fehling's reagent? Give its reaction with an aldehyde?

7. 8.

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What is Tollen's reagent? Give its reaction with an aldehyde. Give the structures and IUPAC names of monohydric phenols of C7H8O.

9.

How is phenol is converted to 2, 4, 6 - tribromophenol?

10.

What is "Esterification" Give one example.

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www.eenadupratibha.net 11.

Name the products when ethanol is heated with conc. H2SO4 at 443 K and 413 K.

12.

Alcohol boil at highest temperature than ethers of comparable molecular masses. Explain.

13.

Why the molecular weight of CH3COOH is 120 in aprotic solvent?

14.

What is "Hell - Volhard - Zelinsky" reaction?

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13. ORGANIC COMPOUNDS CONTAINING NITROGEN Short Answer type Questions (4 Marks)

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1.

Explain

a) Sandmeyer reaction and

b) Carbylamine reaction.

2.

Explain

a) Gatterman reaction and

3.

Explain the coupling of Benzene diazonium chloride with aniline and phenol.

4.

Complete the following conversions: Aniline to

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b) Diazotisation.

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a) Fluorobenzene b) Cyanobenzene c) Benzene and d) Phenol. 5.

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Why the order of basicity for methylamine, N, N - dimethylamine and N, N, N - trimethyl amine changes in gaseous and aqueous medium.

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Very Short Answer type Questions 1.

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Write the structures of different isomeric amines corresponding to the molecular formula C9H13N. pkb of aniline is more than that of methylamine. Explain.

3.

Why ethylamine is more soluble in water where as aniline is not soluble?

4.

Why aniline does not undergo Friedel - Craft's reaction.

5.

Give the structures of A, B and C in the following reaction

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CuCN C6H5N2Cl → A

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NH

2 3 → B → C.

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H+

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(Note: Marks given in the bracket is according to model question paper given in the Akademi Text Book).

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A.N.S.Sankara Rao, Senior Lecturer.

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