Inter (Part-II)
Gujranwala Board 2013
Chemistry Paper: II
Time : 20 Minutes Marks: 17
OBJECTIVE
Note: you have four choices for each objective type question as A, B, C, and D. The choice which is correct, fill that circle in front of that question number with market or pen on the answer book provided. Cutting or filling two or more circles will result in zero mark in that question. Attempt as many question as given in objective type question paper and leave other blank.

Question#1

• The main pollutant of leather tanneries in the waste water is due to the salt of:
  
  (A) Lead
  (B) Chromium
  (C) Copper
  (D) Chromium
  
  
• Which enzyme brings about the hydrolysis of fats?
  
  (A) Urease
  (B) Maltase
  (C) Zymase
  (D) Lipase
  
  
• Which reagent will react with both aldehydes and ketones?
  
  (A) Grignard’s reagent
  (B) Tollen’s reagent
  (C) Fehling’s reagent
  (D) Bendict’s reagent
  
  
• Which compound shows hydrogen bonding?
  
  (A) C₂ H₆
  (B) C₂ H₅ℓ
  (C) CH₃-O-CH₃
  (D) C₂ H₅ OH
  
  
• Benzene cannot undergo:
  
  (A) Substitution reactions
  (B) Addition reactions
  (C) Oxidation reactions
  (D) Elimination reaction
  
  
• The state of hybridization of carbon atom in methane is:
  
  (A) Sp³
  (B) Sp²
  (C) Sp
  (D) Dsp²
  
  
• Which hydrogen halide is the weakest acid in solution?
  
  (A) HF
  (B) HBr
  (C) HI
  (D) HCℓ
  
  
• Which metal is used in the thermite process because of its activity?
  
  (A) Iron
  (B) Copper
  (C) Aluminum
  (D) Zinc
  
  
• Keeping in view the size of atoms , which order is the correct one?
  
  (A) mg>Sr
  (B) Ba>Mg
  (C) Lr> Ce
  (D) Cℓ >I
  
  
• Which woody raw material is used for the manufacture of paper pulp?
  
  (A) Cotton
  (B) Bagasse
  (C) Poplar
  (D) Rice straw
  
  
• Which derivative cannot be prepared directly from acetic acid?
  
  (A) Acetamide
  (B) Acetyl chloride
  (C) Acetic anhydride
  (D) Ethyl acetate
  
  
• When CO₂ is made to react with ethyl magnesium iodide, following by acid hydrolysis, the product formed is:
  
  (A) Propane
  (B) Propanoice acid
  (C) Propββanal
  (D) Propanol
  
  
• β-β’ dichloroethyl sulphide is commonly known as:
  
  (A) Mustard gas
  (B) Laughing gas
  (C) Phosgene gas
  (D) Bio-gas
  
  
• Cannizzaro’s reaction is not given by:
  
  (A) Formaldehyde
  (B) Acetaldehyde
  (C) Benzaldehyde
  (D) Trimethyl acetaldehyde
  
  
• The strength fo binding energy of transition elements depends upon:
  
  (A) Number of electron pairs
  (B) Number of unpaired electorns
  (C) Number of neutrons
  (D) Number of protons
  
  
• Laughing gas is chemically:
  
  (A) NO
  (B) N₂O
  (C) NO₂
  (D) N2O₄
  
  
• Which is not an alkali metal?
  
  (A) Francium
  (B) Caesium
  (C) Rubidium
  (D) Radium

Inter (Part-II)
Gujranwala Board 2013
Chemistry Paper: II
Time : 2:40  Hours Marks: 68
SUBJECTIVE
Note: Section I is compulsory. Attempt any three (3) questions from Section II.
(Section-I)

2.Write short answer to any EIGHT question: (2x8=16)

• Why is the oxidation state of noble gases usually zero?
• How does ZnO behave as an amphoteric oxide?
• iii. Why is two percent gypsum added to cement?
• Why lime water becomes milky when CO₂ is passed through?
• What is milk of magnesia and for which treatment is it used?
• How is Aqua Regia prepared? What is its use?
• vii. Write reactions of two metals which evolve hydrogen upon reaction with HNO₃.
• viii. Give four dissimilarities of oxygen and sulphur.
• Why HF is weaker acid than HCℓ?
• How does K₂Cr₂O₇ act as an oxidizing agent in the presence of H₂SO₄?
• Prepare disilver acetylide by using acetylene.

3.Write the reaction of dehydrohalogenation of ethyl bromide to prepar ethane.

• Write short ansewer to any EIGHT question: (2x8=16)
• Why CO₂ a gas at room temperature while SiO₂ is a solid?
• How will you convert boric acid into borax and vice versa?
• iii. Differentaite between homocycolic and heterocyclic compounds with one example for each.
• Define hydrogenation. Give its two application.
• How benzene can be converted into meta chloronitrobenzene?
• What is wurtz fitting Reaction ? Give an example.
• vii. How Gringnard reagents react with epoxides to form alcohol?
• viii. Why tertiary alky halides follow S_N1mechanism and not S_N2 mechanism?
• What is Bakelite? How is it prepared from phenol?
• How ethanol gives different products with conc. H₂SO₄ under different conditions
• How acetic acid can be converted into acetone?
• xii.. What are zwitter ions ? How these react with acids and bases?

3.Write short answers to any SIX question: (2x6=12)

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

(Section-II)

Question#5
(a) write a brief note on halides.
(b) what is nelson cell. Draw its diagram and show its working.

Question#6
(a) define functional group. Name typical functional groups containing oxygen.
(b) how does formal dehyade react with the following rezgents?

• HCN
• NaOH₃
• NaBH₄/H₂O
• conc.NaOH

Question#7
(a)starting from ethane, outline the reactions for the preparation of the following coumpounds: 4

• 1,2 dibroethane
• II ethyne
• III ethane IV ethalene glycol

(b)write a note on SN₂ reaction..

Question#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 theonile chloride. 4

Question#8
(a)explain the following terms by giving examples:

• ligands
• co-ordination sphere

(b) what is smog? Give conditions for the formation of a smog.