Inter (Part-II)
Lahore Board 2013
Chemistry (New Scheme)
Paper: II (Group-I)
Time: 20 Minutes Marks: 17
OBJECTIVE
Note: Four possible answers A, B, C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with Marker or Pen ink in the answer-book. Cutting or filling two or more circles will result in zero mark in that question.

• Synthetic rubber is made by polymerization of:

(A) Chloroform
(B) Acetylene
(C) Divinyl acetylene
(D) Chloroprene

• In the purification of potable water the coagulant used is:

(A) Nickel sulphate
(B) Copper sulphate
(C) Barium sulphate
(D) Alum

• Which of the following will have highest boiling point:

(A) Methanol
(B) Ethanal
(C) Propanal
(D) 2-Hexanone

• Which of following sulphates is not soluble in water:

(A) Sodium sulphate
(B) Potassium sulphate
(C) Zinc sulphate
(D) Barium sulphate

• Which set of hybrid orbitals has planar triangular shape?

(A) sp³
(B) sp
(C) sp^-
(D) dsp²

• For which mechanism, the first step involved is the same?

(A) E1
(B) E2 and SN²
(C) SN¹ and E2
(D) E1 and SN¹

• Which element among the following belongs to Group IV A of the periodic table?

(A) Barium
(B) Iodine
(C) Lead
(D) oxygen

• Which woody raw material is used for the manufacture of paper pulp?

(A)Cotton
(B) Bagasse
(C) Poplar
(D) Rice Straw

• Which one of the following enzymes brings about the hydrolysis of fats?

(A) Urease
(B) Maltase
(C) Zymase
(D) Lipase

• When sugar is treated with Conc. H₂SO₄ it becomes black due to:

(A) Decolourization
(B) Dehydration
(C) Hydrolysis
(D) Hydration

• Acetamide is prepared by:

(A) Heating ammonium acetate
(B) Heating methyl cyanide
(C) Heating ethyl acetate
(D) The hydrolysis of methyl cyanide

• The anhydride of HClO₄ is:

(A) ClO₃
(B) ClO₂
(C) Cl₂O₅
(D) Cl₂O₇

• Which compound will have the maximum repulsion with water?

(A) C₆H₆
(B) C₂H₅OH
(C) CH₃-CH₂-CH₂-OH₂
(D) CH₃-O₃-CH₃

• Which one is true about melting points of halogens?

(A) Decrease down the group
(B) Increase down the group
(C) Remain same in group
(D) First increase then decrease down the group

• Amongst the following, the compound that can be most readily sulphonated is:

(A) Toluene
(B) Benzene
(C) Nitrobenzene
(D) Chlorobenzene

• Which is most difficult to oxidize?

(A) C₂H₅CHO
(B) CH₃CHO
(C) HCHO
(D) CH₃COCH₃

• Which compound is prepared by Stadeler’s process?

(A)K₂Cr₂O₇
(B) KMnO₄
(C) K₂CrO₄
(D) K₂MnO₄

Inter (Part-II)
Lahore Board 2013
Chemistry (New Scheme)
Paper: II (Group-I)
Time: 2:40 Hours
Marks: 68
SUBJECTIVE

(Section-I)

2. Write short answers to any EIGHT (8) questions: 16

• Why diamond is a non-conductor and graphite is fairly a good conductor?
• Define electron affinity. Discuss its trend in periodic table.
• Why lime water turns milky by passing CO₂ gas?
• KO₂ is used by mountaineers. Discuss.
• What is plaster of parts?
• Give two methods for preparation of PCℓ₃.
• Write two reactions in which H₂SO₄ acts as dehydrating agent.
• Write two points of dissimilarities of oxygen and sulphur.
• Write four uses of halogens.
• Explain chromyl chloride test.
• Convert methane into: (i) Formaldehyde (ii) Nitromethane
• Prepare ethane into: (i) Ethyl alcohol (ii) Ethylchloride

3. Write short answers to any EIGHT (8) questions: 16

• Write down formulas for Bauxite and Corundum?
• What is Chemistry of Borax-bead Test?
• Define Tautomerism and give one example.
• What are Alicyclic and Aromatic Compounds? Give one example in each.
• Briefly describe X-rays studies of benzene structure.
• Define resonance and write down resonance structures of benzene.
• Write down reaction of ethanol with (i) PBr₃ (ii) PCℓ₃
• Define nucleophile and electrophile. Give one example in each.
• What are primary and secondary alcohols? Give one example in each.
• How methanol is prepared from water gas?
• Write down formulas of malonic acid and oxalic acid.
• How carboxylic acids are prepared by the oxidative cleavage of alkenes.

4. Write short answers to any SIX (6) questions: 12

• How aldehyde reacts with phenyl hydrazing? Give its mechanism.
• What is Tollen Test? Illustrate your answer with chemical equation.\
• Explain oxidation of aldehyde.
• How acetaldehyde distinguish from formaldehyde?
• Define polymerization. Explain the term degree of polymerization.
• Define acid number .What is rancidity?
• What are essential nutrients element and why these are needed?
• How ammonium nitrate is prepared? Describe the process.
• Write the structure of starch.

(Section-II)

Note: Attempt any THREE questions.

5. a) Explain variation of: (i) Ionization potential (ii) Electrical conduction along period and group (4)
b) Show four reaction in which lithium behaves different from elements of its own group. (4)

6. a) Write a note on classification of organic compounds. (4)
b) Prepare the following compounds from carboxyl compounds: (i)Lactic acid (ii) Paraldehyde (iii) Ethanal oxime (iv) Croton aldehyde (4)

7. a) How can you convert: (4)

• 2,3- Dibromo butane into 2-Butene.
• Acetone into propane
• Acetylene into vinyl acetylene
• Acetylene into disilver acetylide

b) Describe briefly the two possible mechanisms of ß- elimination reaction. (4)

8. a) Write a note on Friedel-Crafts reaction. (4)
b) How would you prepare carboxylic acid by hydrolysis of esters and from alkyl nitriles? (4)

9. a) How does the electronic configuration of valence shell affect the following Properties of the transition elements: (i) Paramagnetism (ii) Oxidation states. (4)
b) Discuss the term ‘acid rain’ along with its effect on environment. (4)

Inter (Part-II)
Lahore Board 2013
Chemistry (New Scheme)
Paper: II (Group-II)
Time: 20 Minutes
Marks: 17
OBJECTIVE
Note: Four possible answers A, B, C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with Marker or Pen ink in the answer-book. Cutting or filling two or more circles will result in zero mark in that question.

• Keeping in view the size of atoms, which order the correct one?

(A) Mg > Sr
(B) Ba > Mg
(C) Lu > Ce
(D) Cl > I

• Which is not an alkali metal?

(A) Francuim
(B) Cacsium
(C) Rubidium
(D) Radium

• Which metal is used in the thermite process because of its activity?

(A) Iron
(B) Copper
(C) Aluminium
(D) Zinc

• Laughing gas in chemically:

(A) NO
(B) N₂O
(C) NO₂
(D) N₂O₄

• Which hydrogen halide is the weaket acid in solution?

(A) HF
(B) HBr
(C) HI
(D) HCℓ

• The strength of binding energy of transition elements depends upon:

(A) Number of electron pairs
(B) Number of unpaired electrons
(C) Number of neutrons
(D) Number of protons

• The state of hybridization of carbon atom in methane is:

(A) sp³
(B) sp²
(C) sp
(D) dsp³

• ß-ß’ dichloroethyl sulphide is commonly known as:

(A) Mustard gas
(B) Laughing gas
(C) Phosgene gas
(D) Methane gas

• Benzene cannot undergo:

(A) Substitution reaction
(B) Addition reactions
(C) Oxidation reactions
(D) Elimination reacations

• When CO₂ is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is:

(A) Propane
(B) Propanoic acid
(C) Propanal
(D) Propanol

• Which compound shows hydrogen bonding?

(A) C₂H₆
(B) C₂H₅ Cℓ
(C) CH₃-O-CH₃
(D) C₂H₅OH

• Cannizzaro’s reaction is not given by:

(A) Formaldehyde
(B) Acetaldehyde
(C) Benzaldehyde
(D) Trimethyl Acetaldehyde

• Which reagent will react with both aldehydes and ketones?

(A) Grignard’s reagent
(B) Tollen’s reagent
(C) Fehling’s reagent
(D) Benedict’ reagent

• Which derivative cannot be prepared directly from acetic acid?

(A) Acetamide
(B) Acetyl chloride
(C) Acetyl anhydride
(D)Ethyl acetate

• Which enzyme brings about the hydrolysis of fats?

(A)Urease
(B)Maltase
(C) Zymase
(D) Lipase

• Which woody raw material is used for the manufacture of paper pulp?

(A) Cotton
(B) Bagasse
(C) Poplar
(D) Rice straw

• The main pollutant of leather tanneries in the waste water is due to the salt of:

(A) Lead
(B) Chromium
(C) Copper
(D) Chromium (III)

Inter (Part-II)
Lahore Board 2013
Chemistry (New Scheme)
Paper: II (Group-II)
Time: 2:40 Hours
Marks: 68
SUBJECTIVE

(Section-I)

Write short answers to any EIGHT (8) questions: (16)

• Why is the oxidation state of noble gases usually zero?
• How does ZnO behave as an amphoteric oxide?
• Why is two percent gypsum added to cement'?
• Why lime water becomes milky when CO, is passed through it'?
• What is milk of magnesia and for which treatment it used?
• How is aqua Regia prepared? What is its used?
• Write reaction of two metals which evolve hydrogen upon reaction with HNO₃?
• Give four dissimmilarities of oxygen and sulphur.
• Why HF is weaker acid than HC/'?
• How does K₂Cr₂O₇, act as an oxidizing agent in the presence of H₂SO₄?
• Prepare disilver acetylide by using acetylene.
• Write the reaction of dehydrohalogenation of ethyl bromide to prepare ethene.

3. Write short. answers to any EIGHT (8) questions: 16

• Why is CO₂, a gas at room temperature while SIO₂ is a solid?
• How will you convert boric acid into borax and vice versa?
• Differentiate between homocycle and heterocyclic compound with one example for each,
• Define hydrogenation. Give its two applications.
• How benzene can be converted into meta chloronitrobenzene?
• What is Wurtz-Fittin Reaction? Give an example.
• How Grignard reagents react with epoxides to form alcohol?
• Why tertiary alkyl halides follow SN_I mechanism and not SN₂ mechanism?
• What is bakelite? How is it prepared form phenol?
• How ethanol gives different products with conc. H₂SO₄ under different conditions?
• How acetic acid can be converted into acetome?
• What are zwitter ions? How these react with acids and bases?

4. Write short answers to any SIX (6) questions: 12

• Give four uses of formaldehyde.
• How are aldehydes identified by Tollen's test?
• Convert formaldehyde to meta formaldehyde.
• Convert calcium acetate to acetone.
• Explain saponification with an example.
• What is meant by denaturation of proteins?
• What are macronutrients? Give their names.
• What are clinkers?
• Write down formulas for (a) super phosphate (b) triple phosphate.

(SECTION-II)

5.(a) Write a brief note on halides.
(b) What is Nelson Cell'? Draw its diagram and show its working.

6. (a) Define functional group. Name typical functional groups containing oxygen,
(b) How does formaldehyde react with the following reagents? (i) HCN (ii) NaHSO (iii) NaBH₄/H₂O (iv) ethylene glycol

7.(a) Starting from ethene, outline the reactions for Preparation of the following compounds, (i) 1,2 dibromoethane (ii) ethyne (iv) ethane (iv) ethylene glycol
(b) Write a note on SN₂ reaction.

8. (a) Explain the structure of benzene in the light of atomic orbital treatment.
(b) Write down the mechanism of reaction between acetic acid and thionyl chloride.

9. (a) Explain the following terms y giving examples: (i) Ligands (ii) Co-ordination sphere
(b) What is smog? Give conditions for the formation of a smog.