Chemistry
Lahore Board 2015
Inter Part-II
Group-I
Time: 20 Min
Objective Type
Marks = 17
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.

• Which one of the following gases is used for artificial ripening of fruits:
  
  (A) Methane
  (B) Ethene
  (C) Ethane
  (D) Propane
  
  
• Newspaper can be recycled again and again by how many times:
  
  (A) 2
  (B) 3
  (C) 4
  (D) 5
  
  
• 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
  
  
• Chile saltpeter has the chemical formula:
  
  (A) NaNO₃
  (B) KNO₂
  (C) CH₃B₄O₇
  (D) Na₂CO_3.H₂O
  
  
• Select from the following the one which is alcohol:
  
  (A) CH₃CH₂OH
  (B) CH₃OCH₃
  (C) CH₃COOH
  (D) CH₃CH₂Br
  
  
• Grignard reagent is reactive due to:
  
  (A) The presence of halogen atom
  (B) The presence of Mg atom
  (C) The polarity of C – Mg bond
  (D) Presence of Alkyl group
  
  
• The Chief ore of aluminum is:
  
  (A) Na₃AℓF₆
  (B) Aℓ₂O_3.2H₂O
  (C) Aℓ₂O₃
  (D) Aℓ₂O_3.H₂O
  
  
• Which is not a calcareous material:
  
  (A) Lime
  (B) Clay
  (C) Mable
  (D) Marine shell
  
  
• The reaction between fat and NaOH is call:
  
  (A) Esterification
  (B) Hydrogenolysis
  (C) Fermentation
  (D) Saponification
  
  
• Laugging gas is chemically:
  
  (A) NO
  (B) N₂O
  (C) NO₂
  (D) N₂O₄
  
  
• Which reagent is used to reduce a carboxylic group to an alcohol:
  
  (A) H₂/Ni
  (B) H₂/Pt
  (C) NaBH₄
  (D) LiAℓH₄
  
  Which is the strongest acid:
  
  (A) HCℓO
  (B) HCℓO₂
  (C) HCℓO₃
  (D) HCℓO₄
  
  
• Which enzyme is not involved in fermentation of starch:
  
  (A) Diastase
  (B) Zymase
  (C) Urease
  (D) Invertase
  
  
• Keeping in view the size of atoms, which order is the correct one:
  
  (A) Mg >Sr
  (B) Ba > Mg
  (C) Lu > Ce
  (D) Cℓ > l
  
  
• Which compound is the most reactive one:
  
  (A) Benzene
  (B) Ethene
  (C) Ethane
  (D) Ethyne
  
  
• Acetone reacts with HCN to form a cyanohydrin. It is an example of:
  
  (A) Electrophilic addition
  (B) Electrophilic substitution
  (C) Nucleophilic addition
  (D) Nucleophilic substitution
  
  
• Coordination number pf Pt in [Pt Cℓ (NO₂) (NH₃)₄] is:
  
  (A) 2
  (B) 4
  (C) 1
  (D) 6

Chemistry
Lahore Board 2015
Inter Part-II
Group-I
Time: 3.10 hrs
Essay Type
Marks = 83

SECTION-I

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

• Why the metallic character increases from top to bottom in group of metals?
• Alkali metals give ionic hydrides.
• Give four uses of nitric acid.
• Give reaction of P₂O₅ with cold and hot water.
• What is carbonization?
• What are heterocyclic compounds?
• What is leaving group and substrate?
• Prepare: (a) Ethyl thio alcohol (b) Ethyl acetate from ethyl bromide.
• What happen when following compounds are heated
  (a) Ammonium acetate (b) Calcium acetate
• What is peptide bond? Write down formula of a dipeptide.
• What are micro nutrients?Write down two woody and two non-woody raw material for paper pulp manufacture.

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

• Prove decomposition of lithium nitrate; give different products than nitrates of other alkali metals.
• Why solubility of noble gases increase down the group?
• How cis and trans alkenes are tertiary alcohols are identified?
• How primary, secondary and tertiary alcohols are identified?
• What is rancidity of fats? Why it occurs?
• What do you know about chemical oxygen demand?
• Write formulas of (a) beryl. (b) Asbestos.
• Why iodine has metallic luster?
• Write four uses of methane.
• Why phenol is acidic in nature?
• Write structure of cholesterol.
• Write name of components of environment.

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

• Explain structure of CO₂.
• How aqueous solution of borax is alkaline?
• Give formulas of magnetite and haematite.
• Write carbon content in pig iron and wrought iron.
• Prepare benzene from acetylene.
• Define resonance energy. Give resonance energy of benzene.
• Give formulas of formaldehyde and acetaldehyde.
• Prepare acetone from calcium acetate.
• Convert acetaldehyde to lactic acid.

SECTION-II

Note: Attempt any THREE questions.

Question#5

(a) Explain peculiar behavior of beryllium. (4)
(b) Write a note on halogenation of alkanes. (4)

Question#6

(a) How and under what conditions does aluminum react with
(i) O₂ (ii) NaOH (iii) H₂SO₄ (iv) N₂. (4)
(b)What are Friedel-Crafts Reactions? Explain giving two examples. (4)

Question#7

(a) Describe eight points of similarities of oxygen with sulphur. (4)
(b) Describe SN2 reaction of alkyl halides in detail. (4)

Question#8

(a) Give rules for nomenclature of oxyacids of halogens. (4)
(b)Give two methods for preparation of phenol. (4)

Question#9

(a) What do you know about cracking of petroleum? (4)
(b) How does acetaldehyde react with following reagents. (4)
(i) C₂H₅Mgl (ii) HCN (iii) NaHSO₃ (iv) l₂/NaOH

SECTION-III (Practical Part)

Note: Attempt any THREE questions.

1. How qualitative analysis of CD⁺⁺ is carried out systematically? (5)
2. How ammonium ion is qualitatively analyzed? 5
3. (i) How SO₄^-2 is qualitatively identified systematically? (4)
   (ii) How ring test is performed. (1)
4. How nitrogen and halogens are detected from organic compound? 5
5. Write the material required, equation and procedure for preparation of aspirin. (5)

Chemistry
Lahore Board 2015
Inter Part-II
Group-II
Time: 20 Min
Objective Type
Marks = 17
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.

• Chose the correct statement:
  
  (A) Na⁺ is smaller than Na atom
  (B) Na⁺ is larger than Na atom
  (C) Cℓ is smaller than Cℓ atom
  (D) Cℓ (ion) and Cℓ (atom) are equal in size
  
  
• Chile saltpeter has the chemical formula:
  
  (A) KNO₂
  (B) NaNO₃
  (C) Na₂B₄O₇
  (D) Na₂CO₃
  
  
• Aluminium oxide is:
  
  (A) Acidic oxide
  (B) Basic oxide
  (C) Amphoteric oxide
  (D) None of these
  
  
• Laughing gas is chemically:
  
  (A) NO
  (B) NO₂
  (C) N₂O
  (D) N₂O₄
  
  
• Which one is perchloric acid:
  
  (A) HCℓO
  (B) HCℓO₃
  (C) HCℓO₂
  (D) HCℓO₄
  
  
• Which of the following is a non0typical transition element:
  
  (A) Cr
  (B) Mn
  (C) Zn
  (D) Iron
  
  
• Select the following one which is alcohol:
  
  (A) CH₃OCH₃
  (B) CH₃CH₃
  (C) CH₃CH₂OH
  (D) CH₃-Cℓ
  
  
• ß-ß’ – dichloroethyl sulphide is commonly known as:
  
  (A) Mustard gas
  (B) Laughing gas
  (C) Phosphene gas
  (D) Bio-gas
  
  
• Which compound is the most reactive one:
  
  (A) Benzene
  (B) Ethene
  (C) Ethane
  (D) Ethyne
  
  
• When CO₂ is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is:
  
  (A) Propane
  (B) Propanal
  (C) Propanol
  (D) Propanoic acid
  
  
• Which compound show hydrogen bonding:
  
  (A) C₂H₆
  (B) C₂H₅Cℓ
  (C) CH₃OCH₃
  (D) C₂H₅OH
  
  
• Which of the following will react with Tollen’s reagent :
  
  (A) CH₃-C-H
  (B) CH₃COCH₃
  (C) CH₃COOH
  (D) CH₃COC₂H₅
  
  
• Aldehydes react with hydroxylamine in acidic solution to give:
  
  (A) An oxime
  (B) Aldol
  (C) Polymer
  (D) Acetic acid
  
  
• Which one is neutral amino acid:
  
  (A) Lysine
  (B) Histidine
  (C) Valine
  (D) Glutamic acid
  
  
• Which of the following is an addition polymer:
  
  (A) Nylon 6,6
  (B) Polystyrene
  (C) Terylene
  (D) Epoxy resin
  
  
• The word paper is derived from the name of which reedy plant:
  
  (A) Rose
  (B) Sun flower
  (C) Water hyacinth
  (D) Papyrus
  
  
• Newspaper can be recycled again and again by how many times:
  
  (A) 2
  (B) 3
  (C) 4
  (D) 5

Chemistry
Lahore Board 2015
Inter Part-II
Group-I
Time: 3.10 hrs
Essay Type
Marks = 83

SECTION-I

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

• Zn, Cd, Hg were placed with alkaline earth metals in Mendeleev’s table. How this confusion is removed in the modern periodic table?
• How does hydrogen resemble with alkali metals? Write any for point.
• Justify that NO acts an oxidizing agent.
• How does HNO₂ act as a reducing agent?
• Name the organic compound first of all prepared in the laboratory, and how?
• Give idea about knocking in the internal combustion engine.
• What are primary and tertiary alkyl halides? Give one example each.
• SOCℓ₂ is the best reagent to get alkyl chloride from alcohols. Write equation including solvent necessary to complete their reaction.
• How would you convert CH₃COOH to CH₃CONH₂?
• Define neutral amino acids with example.
• What is a need for fertilizers?
• Five any for important qualities of fertilizer.

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

• How lime and sand are used to make glass?
• Why the aqueous solution of NA₂CO₃ is alkaline in nature?
• What are Freons and Teflon?
• Why HF is weaker acid than HCℓ?
• How will you synthesize following compounds from ethyne: (a) Benzene (b) Chloroprene.
• How is ethane converted into ethyl alcohol?
• Absolute alcohol cannot be prepared by fermentation process, why?
• Write structural formula of the compounds: (a) Carbolic acid (b) Glycerol.
• In what way fats and oils are different?
• What are polymers? Give two example.
• What are leachates?
• Name the components of the environment.

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

• Give reaction of orthoboric acid with NaOH and C₂H₅
• Give two similarities between carbon and silicon.
• Why transition elements have variable oxidation state?
• What is ligand? Give types of ligands.
• Give reaction of (a) Phenol with zinc, (b) Benzene with SO₃
• What is aromatization?
• What is difference between aldehyde and ketone?
• Give industrial preparation of formaldehyde.
• Prepare lactic acid from acetaldehyde.

SECTION-II

Note: Attempt any THREE questions.

Question #5

(a) Write the commercial method for the preparation of NaOH. (4)
(b) Prepare ethane from Kolbe’s electrolytic method. Write down its mechanism. (4)

Question #6

(a) Write down two methods for the preparation of borax. Also explain the action of heat on borax. (4)
(b) Convert benzene into: (i) Cyclohexane (ii) Maleic acid (iii) Glyoxal (iv) Benzene sulphonic acid. (4)

Question #7

(a) Describe Birkeland and eyde’s process for the manufacture of nitric acid. (4)
(b) How does Ethyl magnesium bromide react with (i) CO₂(ii) CH₃COCH_{3 .}(4)

Question #8

(a) Explain peculiar behaviour of fluorine. (4)
(b) Convert phenol into : (i) Picric acid (ii) Cyclohexanol (iii) Bakelite. (4)

Question #9

(a) Explain structure of ethene on basis of hybridization. 4
(b) Dicuss oxidation of aldehation with:
(i) K₂Cr₂O₇/H₂SO₄ (ii) Tollen’s reagent (4)

SECTION-III (Practical Part)

Note: Attempt any THREE questions.

1. How will you analyze qualitatively Fe⁺³ ions in a systematic way? (5)
2. Write the qualitative analysis of Sr⁺² ions in systematic manner. (5)
3. (i) How qualitative analysis of CH₃COO^- ion is performed in a sysytematic manner?
   (ii) How lake test for aluminium ion (Aℓ⁺³) is performed? (5)
4. How phenolic group is identified in an organic copmpund? (5)
5. Write the material required, equation and procedure for preparation of phenyl glucosazone.
   (5)