Inter (Part-II) Lahore Board 2014
Chemistry Paper II (Objective Type)
Time Allowed: 20 Minutes Max. Marks: 17
(Group-I)

Note: Four possible answers A, B. C and D to each question are given. The chaise which you think is correct, fill that circle in front of that question with Marker or Pen ink. Cutting or filling two or to more circles will result in zero mark in that question.

• Which is the least reactive of all the alkali metals:

(A) Li
(B) Na
(C) K
(D) Cs

• Which of the following element has lowest ionization energy:

(A) Beryllium
(B) Boron
(C) Carbon
(D) Oxygen

• Which element has lowest melting point

(A) Beryllium
(B) Magnesium
(C) Calcium
(D) Barium

• Kaolin is a mineral of

(A) Carbon
(B) Magnesium
(C) Silicon
(D) Aluminium

• Which of the following is a reddish brown gas :

(A) N₂0
(B) NO
(C) N₂0₅
(D) NO₂

• Which of the following statement is correct :

(A) Bond energy of F₂ is less than Cℓ₂
(B) Bond energy of F₂ is less than I₂
(C) Bond energy of C₂ is less than F₂
(D) Bond energy of C₂ is less than Br₂

• The coordination number of Cu in [Cu(NH₃)₄]SO₄ is:

(A) Zero
(B) Two
(C) Four
(D) Six

• The process used to Improve quality of gasoline is called :

(A) Thermal cracking
(B) Reforming
(C) Steam cracking
(D) Combustion

• The catalytic oxidation of methane produces:

(A) CO + H₂O
(B) CO₂ + H₂O
(C) C + H₂O
(D) H₃C—OH

• Toluene HNO₃+H₂SO₄ 100⁰C.

(A) Orthonitrotoluene
(B) m nitrotoluene
(C) p-nitrotoluene
(D) 2,4,6-TNT

• The reactivity of Grignard’s reagent is due to

(A) Polarity of Mg-X bond
(B) Polarity of C-Mg bond.
(C) Electronegativity of halogen atom
(D) Presence of Mg atom

• Alcohol obtained by fermentation is only upto:

(A) 10%
(B) 12%
(C) 20%
(D) 95%

• According to Lewis concept, ethers behave as

(A) Acid
(B) Base
(C) Solvent
(D) Nucleophile

• Which of the following reagents will react with both aldehydes and ketones:

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

• Which of following is an addition polymer :

(A) Polyester
(B) Polystyrene 
(C) Nylon 6, 6
(D) Terylene

• Which is not a calcarious material:

(A) Clay
(B) Limestone
(C) Marble
(D) Chalk

• The pH of unpolluted rain water should be :

(A) 5.00
(B) 5.60
(C) 6.50
(D) 7.00

Inter (Part-II) Lahore Board 2014
Chemistry Paper II (Essay Type)
Time Allowed: 3.10 hours Max. Marks: 83
(Group-1)

(SECTION-I)

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

• Why the oxidation state of noble gases is usually zero?
• Why metallic character increases from top to bottom in a group of metals?
• Why lime is added to acidic soil?
• Why is CO₂ a gas at room temperature white SiO₂ is a solid?
• Write four uses of sodium silicate.
• Write the reactions of boric acid with:
  (i) Ethyl alcohol (ii) NaOH
• P₂O₅ is a powerful dehydrating agent. Give two examples.
• Write two dissimilarities of oxygen and Sulphur.
• Write any four uses of nitric acid.
• Write any four application of noble gases.
• Write the reaction of NaOH with Cℓ₂ in cold state.
• Why HF is a weaker acid than other halogen acids?

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

• Why does damaged tin plated iron get rusted quickly?
• What are Chelates? Give an example.
• Differentiate between homocyclic and hetrocyclic compound.
• Define functional group isomerism and give an example.
• Alkanes are less reactive than alkenes. Comment.
• Ethene can be converted into ethyl alcohol. Write equation.
• Write down four uses of formaldehyde.
• Write the names of those weak oxidizing agents. which can oxidize aldehyde but not the ketone.
• How iodoform is prepared from acetaldehyde and ethyl alcohol?
• Define saponification number and iodine number.
• What are carbohydrates? Why are they called so?
• Give the difference between DNA and RNA.

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

• Write down the resonance structures of benzene.
• What is the nature of C-Mg bond in R-Mg-X?
• Give any four uses of methyl alcohol.
• How does phenol react with alkali?
• What are fertilizers?
• Name the essential constituents of cement.
• Why wet cleaning is done in paper manufacture?
• What are the secondary pollutants?
• How the gases in the atmosphere absorb?

(SECTION-I1)

Note: Attempt any THREE questions.

5.(a) What are halides? Classify them on the basis of nature of bonding. Describe covalent halides in detail. (4)
(b) Describe the commercial preparation of sodium by Down's cell. What are advantages of this process? (4)

6.(a) What is orbital hybridization? Explain Sp³ mode of hybridization of carbon. (4)
(b) Write a note on β-elimination reaction. (4)

7.(a) How will you distinguish ethane, ethene and ethyne. (4)
(b) Convert acetic acid into (i) Methane. (ii) Acetyl chloride. (4)

8.(a) What are Friedel-Crafts reactions? Explain mechanisms of alkylation and acylation of benzene. (4)
(b) Write two methods for the preparation of phenol. How dies phenol react with : (i) Con. HNO³ (ii) Bromine water. (4)

9.(a) KMnO₄ acts as an oxidizing agent. Give four reactions in support of your answer. (4)
(b) Name the components of environment. Give approximate composition of atmosphere and lithosphere. (4)

SECTION - III (Practical Part)

Note: Attempt any Three questions.

A(i) Write down two confirmatory tests for iodide radical. (3)
(ii) How palm test is performed? (2)

B(i)Write down two confirmatory tests for Cr³⁺ radical. (3)
(ii) How Fe² is indicated?

C(i)Write down any two confirmatory tests for NH4 radical. (3)
(ii)Give the chemistry of borax bead test. (2)

(D)Write down material required, chemical equation and procedure for the preparation of copper ammine complex. (1,1,3)

(E) How will you detect sulphur and halogens in the given organic compound? (2, 1.5, 1.5)

Inter (Part-II) Lahore Board 2014
Chemistry Paper II (Objective Type)
Time Allowed: 20 Minutes Max. Marks: 17
(Group-II)

Note: You have four choice for each objective type question as A, B, C and. The choice which you think is correct: fill that circle in front of that question number. Use marker or pen to fill the circles. Cutting or filling two or more circles will result in zero mark in that question.

• The reactivity of Grignard,s regant is due to:

(a) Polarity of Mg - X bond
(b) Polarity of C - Mg bond
(c) Electro negativity of halogen atom
(d) Presence of Mg atom

• Which of the following regents will react with both aldehydes and ketones:

(a) Grignard,s reagent
(b) Tollent,s reagent
(c) Fehling,s reagent
(d) Benedict,s reagent

• Kaolin is a mineral of

(a) Carton
(b) Magnesium
(c) Silicon
(d) Aluminium

• Which of the following is an addition polymer:

(a) Polyester
(b) Polystyrene
(c) Nylon 6,6
(d) Terylene

• The process used to improve quality of gasoline is called:

(a) Temal cracking
(b) Reforming
(c) Steam cracking
(d) Combustion

• Which is not a calcarious material:

(a) Clay
(b) Limestone
(c) Marble
(d) Chalk

• Which of the following statement is correct:

(a) Bond energy of F₂ is less than C1₂
(b) Bond energy of F₂ is less than F₂
(c)Bond energy of C1₂ is less than F₂
(d)Bond energy of C1₂is less than Br₂

• Which of the following element has lowest ionization energy:

(a) Beryllium
(b) Boron
(c) Carbon
(d) Oxygen

• Alcohol obtained by fermentation is only upto:

(a) 10%
(b) I 2%
(c) 20%
(d) 95%

• According to Lewis concept, ethers behave as

(a) Acid
(b) Base
(c) Solvent
(d) Nucleophile

• The catalytic oxidation of methane produces:

(a) CO +H₂O
(b) CO₂ +H₂O
(c) C + H₂O
(d) H₃O ̶ OH

• Which element has lowest melting point:

(a) Beryllium
(b) Magnesium
(c) Calcium
(d) Barium

• The coordination number of Cu in [Cu (NH₃)₄ ]SO₄ is:

(a) Zero
(b) Two
(c) Four
(d) Six

• Which of the following is a reddish brown gas:

(a)N₂O
(b) NO
(c) N₂O₄
(d) NO₂

• Toluene 

(a) Orthonitrotoluene
(b) m - niteotoluene
(c) p - nitrotoluene
(d) 2,4,6 – TNT

• The pH of unpolluted rain water should be:

(a) 5.00
(b) 5.60
(c) 6.50
(d) 7.00

• Which is the least reactive of all the alkali metals:

(a)Li
(b) Na
(c) k
(d) Cs

LAHORE BOARD 2014
PAPER CHEMISTRY PART-II
Time: 3:10 Hours (Subjective Part) Marks: 83

Section II

2. Attempt any EIGHT short questions. (8 x = 16)

• Why the oxidation state of noble gases is usually zero?
• Why metallic character increases from top to bottom in a group of metals?
• Why lime is added to acidicsoil?.
• Why is CO₂ a gas at room temperature while Si0₂ is a solid?
• Write four uses of sodium silicate.
• Write the reactions of boric acict with: (i) Ethyl alcohol (ii) NaOH
• P₂0₅ is powerful dehydrating agent. Give two examples.
• Write two dissimilaritites of oxygen and Sulphur.
• Write any four uses of nitric acid.
• Write any four application of noble gases.
• Write the reaction of NaOH with Cl₂ in cold state.
• Why HF is a weaker acid than other halogen acids?

3. Attempt any EIGHT short questions. (8 X = 16)

• Why does damaged tin plated iron get rusted quickly?
• What are Chelates? Give an example.
• Differentiate between homoocyclic and hetrocyclic compound.
• Define functional group isomerism and give an example.
• Alkanes are less reactive than alkenes. Comment.
• Ethene can be converted into ethyl alcohol. Write equation.
• Write down four uses of fomladehyde.
• Write the names of those weak oxidizing agents, which can oxidize aldehyde but note the ketone.
• How iodoform is prepared from acetaldehyde and ethyl alcohol?
• Define saponification number and iodine number.
• What are carbohydrates? why are they called so?
• Give the difference between DNA and RNA.

4. Attempt any SIX short questions. (6 x 2 = 12)

• Write down the resonance structures of benzene.
• What is the nature of C- Mg bond in R-Mg-X?
• Give any four uses of methyl alcohol.
• How does phenol rev with alkali?
• What are fertilizers?
• Name the essential constituents of cement.
• Why wet cleaning is done in paper manufacture?
• What are the secondary pollution?
• How the gases in the atmosphere absorb?

SECTION III

Attempt any THREE questions. (8× 3 = 24)

5.(a) What are halides? Classify than on the basis of nature of bonding, Describe covalent halides in detail.
(b) Describe the commerical preparation of sodium by Down's.cell. What are advantages of this process?

6.(a) What is orbital hybridization? Explain Sp³ mode of hybridization of carbon.
(b) Write a note on ß-elimination reaction.

7.(a) How will you distinguish ethane, ethene and ethyne,
(b) Convert acetic acid into: (i) Methane (ii) Acetyl chloride

8.(a) What are Friedel-Crafts reactions? Explain mechanisms of alkylation and acylation of benzene.
(b) Write two methods for the preparation of phenol. How does phenol react with: (i) Con. HNO₃ (ii) Bromine water

9.(a) KMnO₄ acts as an oxidizing agent, Give four reactions in support of your answer.
(b) Name the components of environment. Give approximate composition of atmosphere and lithosphere.

SECTION IV

Atempt any THREE questions. (5x 3 — 15)

10. (a)(i) Write down two confirmatory tests for iodide radical.

(ii) How pairn test is performed?

(b)(1) Write down two confirmatory tests for Cr3+ redical.

(ii) How Fez* is indicate?

(i) Write down any two confirmatory test for NI-r, radicol.

(ii) Give the chemistry of borax bead test.

(iii) Write down material requied, chemical equation and procedure for the preparation of copper ammine complex.

(a)How will you detect sulpher and halogens i u t Isegiven organic

compound?