SARGODHA BOARD 2017
PAPER CHEMISTRY PART-2
Time: 20 MM.
(Group-1)
(Objective Part)
Marks: 17
Note: You have four choice for each objective type question as A, B, C and D. 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.

• Which of the following elements has lowest ionization energy?

(A) B
(B) C
(C) Be
(D) Oxygen

• Which of the following sulphates is insoluble in water?

(A) Na₂SO₄
(B) BaSO₄
(C) K₂SO₄
(D) ZnSO₄

• Aluminum oxide is:

(A) Acidic oxide
(B) Neutral oxide
(C) Basic oxide
(D) Amphoteric oxide

• Which catalyst is used in contact process?

(A) Fe₂O₃
(B) SO₃
(C) V₂O₅
(D) Ag₂O

• Hydrogen bond is the strongest between the molecules of:

(A) HI
(B) HCI
(C) HF
(D) HBr

• Which of the following is a non-typical transition element?

(A) Zn
(B) Fe
(C) Mn
(D) Cr

• Which set of hybrid orbitals has planar triangular shape

(A) sp
(B) sp²
(C) sp³
(D) dsp³

• Vinyl acetylene combines with HCl to form

(A) Chloroprene
(B) Divinyl acetylene
(C) Benzene
(D) Polyacetylene

• Aromatic hydrocarbons are the derivatives of

(A) Paraffin’s
(B) C₆H₁₂
(C) R — CH = CH — R
(D) C₆H₆

• SN₂ reaction can be best carried out with:

(A) Primary alkyl halide
(B) Secondary alkyl halide
(C) Tert butyl chloride
(D) Tertiary alkyl halide

• Which enzyme is not involved in fermentation of starch?

(A) Diastase
(B) Urease
(C) Inverse
(D) Zymase

• Phosphorus helps the growth of

(A) Seed
(B) Root
(C) Stem
(D) Leaves

• Which of the following esters has orange flavor?

(A) Amyl acetate
(B) Benzyl acetate
(C) Amyl butyrate
(D) Octyl acetate

• Which reagent is used to reduce a carboxylic group to an alcohol.

(A) H₂/Ni
(B) H₂/Pt
(C) NaBH₄
(D) LiAlH₄

• Which one of the following is a water soluble vitamin?

(A) Ascorbic acid
(B) Niacin
(C) Trypsin
(D) Riboflavin

• Which Three elements are needed for the healthy growth of plants.

(A) N, S, P
(B) N, P, K
(C) N, K, C
(D) N, Ca, P

• Newspaper can be recycled again and again by how many times?

(A) 3
(B) 2
(C) 5
(D) 4

SARGODHA BOARD 2017
PAPER CHEMISTRY PART-2
Time: 3:10 Hours
(Group-1)
(Subjective Part)
Marks: 83
Section-I

Q.2 Answer any Eight parts. All parts carry equal marks.

• Why is the ionic radius of a negative ion is greater than that of its neutral atom?
  
• Alkali metals give ionic hydrides. Give reason.
  
• Why is 2% gypsum added in the cement?
  
• BeO is amphoteric in nature, Justify.
  
• What is action of heat on orthoboric acid
  
• Write two uses of orthoboric acid.
  
• H₂SO₄ acts as oxidizing agent write two reactions.
  
• Write two reactions for the Preparation of Phosphorus acid.
  
• Define Central metal ion in Complex Compounds. Give one example.
  
• How is corrosion prevented by Galvanizing?
  
• How is sulphur dioxide is produced by human activities?
  
• What are the effects of dumping waste in sea and rivers.

Q.3 Answer any Eight parts. All parts carry equal marks.

• In what respect fluorine differs from its Group members?
  
• Complete and Balance the Equation
  
  • (a) XeF₆+NH₃?
    
  • (b) XeF₄ + Hg?
    
• Write importance of cracking.
  
• Justify that coal is one of the major source of organic compounds.
  
• Justify that Ethene (C₂H₄) is more reactive than C₆H₆
  
• Write note on Metamerism.
  
• Write two reactions in which Benzene is as unsaturated compound.
  
• Define resonance and resonance Energy.
  
• Convert C₂H₅Cl to T.E.L (Tetra ethyl Lead)
  
• What is the role of stability of carbonium ion in deciding the Mechanism of substitution reaction?
  
• Define (i) fermentation (ii) Oxonium ion
  
• Write 4-uses of C₂H₅OH Alcohols.

Q.4 Answer any Six parts. All parts carry equal marks.

• Fehling's solution reacts with aldehydes to give red ppt. Justify it.
  
• Give four uses of Formaldehyde.
  
• What are fatty acids.
  
• Convert acetic acid into Ketone.
  
• What are epoxy resins?
  
• What is PVC, give example.
  
• Define Homopolymer with example.
  
• Give any four important qualities of fertilizer.
  
• Name any four non-woody raw materials used for the preparation of paper

Section-II

NOTE: Attempt any Three questions. All questions carry equal marks.

Q. 5 a. Why is diamond nonconductor while graphite is a good conductor of electricity?
b. Give any eight differences of lithium from other alkali metals?

Q. 6 a. Describe manufacture of wrought iron from Cast iron.
b. Discuss location of ozone in atmosphere. How is ozone layer being depleted?

Q. 7 a. What is sp2 Hybridization? Describe structure of Ethene in light of sp2 Hybridization.
b. How will you prepare following compounds from Ethyl bromide
(i) n- Butane
(ii) Ethane
(iii) Ethene
(iv) Propanoic acid.

Q. 8 a.Write a note on halogenation of alkanes.
b. What are halo-form reactions. How lodoform test is useful.

Q. 9 a. Write down the mechanisms of the following reactions.
(i) Friedel — Craft's alkylation
(ii) Nitration of benzene
b. Give the reactions of phenol with the following:
(i) Zn
(ii) bromine water
(iii) Conc. HN₃
(iv) Conc. H₂SO₄ 

SARGODHA BOARD 2017
PAPER CHEMISTRY PART-2
Time: 20 MM.
(Group-2)
(Objective Part)
Marks: 17
Note: You have four choice for each objective type question as A, B, C and D. 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.

• Mark the correct statement.

(A) Metallic character increases down the group
(B) Metallic character increases from left to right along a period
(C) Metallic character remains the same from left to right along a period
(D) Metallic character remains the same down the group

• The mineral CaSO₂ 2H₂O has the general name

(A) Gypsum
(B) Dolomite
(C) Calcite
(D) Epsom salt

• Which metal is used in the thermite process.

(A) Fe
(B) Cu
(C) Al
(D) Zn

• Which catalyst is used in contact process?

(A) Fe₂O₃
(B) V₂O₅
(C) SO₃
(D) Ag₂O

• Which of the following hydrogen halides is the weakest acid in solution?

(A) HF
(B) HBr
(C) HI
(D) HCl

• The total no of transition elements is

(A) 10
(B) 14
(C) 40
(D) 58

• Linear shape is associated with which set of hybrid orbitals?

(A) sp
(B) sp²
(C) sp³
(D) dsp²

• The presence of double bond in a compound is the sign of

(A) Saturation
(B) Unsaturation
(C) Substitution
(D) None

• The electrophile in aromatic sulphonation is

(A) H₂SO₄
(B) HSO₄
(C) SO₃
(D) SO³⁺

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

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

• Which compound is more soluble in water

(A) C₂H₅OH
(B) C₆H₅OH
(C) CH₃COCH₃
(D) None of these

• Cannizzaro's reaction is not given by

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

• Which of following derivatives cannot be prepared directly from acetic acid (A) Acetamide

(B) Acetyl chloride
(C) Acetic anhydride
(D) Ethyl acetate

• Acetic acid is manufactured by

(A) Distillation
(B) Fermentation
(C) Ozonolysis
(D) Esterification

• Which of these polymers is an addition polymer?

(A) Nylon-6,6
(B) Polystyrene
(C) Terylene
(D) Epoxy resin

• Which is not a calcareous material?

(A) Lime
(B) Clay
(C) Marble
(D) Marine shells

• The pH range of the acid rain is

(A) 7 - 6.5
(B) 6.5 - 6
(C) 6 - 5.6
(D) Less than 5   

SARGODHA BOARD 2017
PAPER CHEMISTRY PART-2
Time: 3:10 Hours
(Group-2)
(Subjective Part)
Marks: 83
Section-I

Q.2 Answer any Eight parts. All parts carry equal marks.

• Why size of an anion is always greater to that of its parent atom.
  
• Hydration energy decreases in the group from top to bottom, way?
  
• How gypsum is converted to plaster of paris.
  
• Why lime is added to an acidic soil.
  
• Write two points to show peculiar behavior of carbon.
  
• Write reactions for
  
  • Borax is heated with COO.
    
  • Al₂O₃ is heated with NaOH solution,
    
• P₂O₅ is a powerful dehydrating agent, Prove giving example.
  
• Give the advantages of contact process for the manufacture of sulphuric acid.
  
• Name different forms of Iron and which is the purest.
  
• What do you mean by Galvanizing.
  
• Differentiate between primary and secondary pollutants.
  
• Write role of chlorofluorocarbons (CFc₅) in destroying ozone,

Q.3 Answer any Eight parts. All parts carry equal marks.

• Give major applications of iodine?
  
• Complete the following reactions
  
  • CaOCl₂ + dil H₂SO₄?
    
  • CaOCl₂ + NH₂ ?
    
• What is composition of natural gas. Give uses of natural gas.
  
• Define Refinery? Mention oil refineries in Pakistan.
  
• What are the following reactions?
  
  • Hydrogenolysis
    
  • wolf-Kishner reduction
    
• What is effect of branching on boiling points of thanes?
  
• What information we get from X-rays study of benzene structure.
  
• What is meant by directive influence of substituent? Give an example?
  
• What is Wurtz synthesis?
  
• Why thionyl chloride is best reagent to prepare alkyl halides from alcohol. Give an example?
  
• Phenol is acidic in nature but alcohol is weaker. Justify
  
• Ethanol different products with concentrated H₂SO₄ at different conditions. Why?

Q.4 Answer any Six parts. All parts carry equal marks.

• Write general mechanism of Base catalyzed addition reaction.
  
• Convert Acetaldehyde into paraldehyde in the presence of dil. H₂SO₄.
  
• What are acidic amino acids? Give two examples.
  
• How acetic acid can be converted into ethyl alcohol.
  
• Define copolymer with one example.
  
• Draw two cyclic forms of glucose.
  
• What is saponification number? Give one example?
  
• What are phosphatic fertilizers? Write the formulas of two phosphate fertilizers.
  
• Write the names of four non Woody raw materials.

Section-II

NOTE: Attempt any Three questions. All questions carry equal marks.

Q. 5 a. Define Electron affinity. How does it vary in groups and periods generally in periodic table?
b. Describe with diagram the commercial preparation of sodium hydroxide by the Diaphragm cell.

Q. 6 a. How will you prepare Wrought Iron from Cost Iron by Puddling process.
b. What are the main sources from which Surface and Ground water is polluted (Write only four)

Q. 7 a. Explain any four features of organic compounds.
b. Write reactions of Grignard reagent with the followings.
(i) HCHO
(ii) CH₃CHO
(iii) (CH₃)₂ CO
(iv) CICN

Q. 8 a. Describe the ease of dehydration of primary, secondary and tertiary alcohols with suitable reactions?
b. How will you make the following conversions?
(i) Ethane into ethanol
(ii) Ethanol into 2-Butanone

Q. 9 a. Predict the major products of bromination of following compounds.
(i) Toluene
(ii) Nitrobenzene
(iii) Bromobenzene
(iv) Benzoic acid,
b. Give preparation of ethanol from molasses and starch.