BAHAWALPUR BOARD 2017
PAPER CHEMISTRY PART-2
Time: 20 MM.
(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 some from left to right along a period
(D) Metallic character remains the same down the group

• Borax has the chemical formula:

(A) KNO₃
(B) NaNO₃
(C)Na₂B₄O₇.10H₂O
(D) Na₂CO₃.H₂O

• Tincal is a mineral of:

(A) Al
(B) B
(C) Si
(D) C

• Which of the following specie has maximum no. of unpaired electrons:

(A) O₂
(B) O²⁺
(C) P^2-
(D) Q^22-

• The Anhydride of HCIO4 is:

(A) CIO₃
(B) CIO₂
(C) Cl₂O₇
(D) C1₂O₅

• Coordination Number of Pt in [PtCI(NO₂)(NH₃)₄]

(A) 2
(B) 1
(C) 6
(D) 4

• Which set of Hybrid Orbitals has Linear Shape:

(A) sp
(B) sp²
(C) Sp³
(D) dsp²

• Which one of the following gases is used for Artificial Ripening of Fruits:

(A) Methane
(B) Ethene
(C) Ethyne
(D) Propane

• The Electrophile in Aromatic Sulphonation is:

(A) HSO₄^1-
(B) SO₃¹⁺
(C) SO₃
(D) H₂SO₄

• When CO₂ is made to react with Ethyl Magnesium Iodide, followed by Acid Hydrolysis, the product formed is:

(A) Propane
(B) Propanol
(C) Propionic Acid
(D) Acetic Acid

• According to Lewis Concept Ethers behave as:

(A) Acid
(B) Acid as well as a Base
(C)Salt
(D) Base

• Aldol Condensation is given by:

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

• Which reagent is used to reduce Carboxylic Acid to an Alcohol:

(A) H₂/Pt
(B) H₂/Ni
(C) LiA1H₄
(D) NaBH₄

• An Aqueous Solution of an organic compound reacts with Na2CO3 to produce CO2 Gas. Which one of the following could be the Organic Compound:

(A) CH₂ = CH – CH₃
(B) CH₃ - CHO
(C) CH₃COOC₂H₅
(D) CH₃—CH₂-COOH

• Which one of the following statements about Glucose and Sucrose is correct:

(A) Both are Insoluble in Water
(B) Both are naturally occurring
(C) Both are Hexoses
(D) Both are Disaccharide

• Which is not a Calcareous Material

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

• The main pollutant of Leather Tanneries in the waste water is due to the salt of:

(A) Chromium (III)
(B) Chromium (V1)
(C) Lead
(D) Copper

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

2. Attempt any EIGHT short questions.

• Why Na₂O is basic while P₂O₅ is acidic?
  
• Write four properties of Vitreous Silica.
  
• Why 2% Gypsum is added in the cement?
  
• Write the formulas of different Acids of Boron.
  
• Write the formulas of:
  (a) Beryl
  (b) Sylvite
  
• Differentiate between Wrought Iron and Steel.
  
• Why the second value of electron affinity of oxygen is shown with positive sign?
  
• H₂SO₄ behaves as an Acid. Write two reactions to illustrate the truth.
  
• Why is SO3 dissolved in H₂SO₄ and not in water?
  
• Why does damaged tin plated iron get rusted quickly?
  
• What are the effects of CO on human health?
  
• What is the Biochemical Oxygen Demand (BOD)?

3. Attempt any EIGHT short questions.

• Why iodine has metallic lusture?
  
• Write two uses of Bleaching Powder.
  
• How is coal produced from the remains of Trees?
  
• Define Functional Group Isomerism. Write its one example.
  
• What is Clemmensen Reduction?
  
• Write its reaction.
  
• Write two identification tests of I-Alkynes.
  
• Describe the X - ray studies of Benzene Structure.
  
• What happens when Acidified KMnO4 is added to Methylbenzene and Ethylbenzene?
  
• Define Nucleophile and substrate with examples.
  
• How will you prepare Tertiary Alcohol from Acetone?
  
• How is Alcohol denatured to make it unfit for drinking?
  
• How will you convert Methanol into Ethanol?

4. Attempt any SIX short questions.

• Briefly describe the Bleaching Process of Pulp.
  
• Write importance of Lipids.
  
• What do you understand by Hardening of Oil?
  
• How temperature affects the activity of Enzyme?
  
• Write mechanism of the reaction: (i) Aldehyde + HCN
  
• Justify that Cannizzaro Reaction is a self oxidation reduction reaction.
  
• Write down the I.U.P.A.C. names of:
  (a) CH₂(COOH)₂
  (b) NH₂ – CH₂-COOH
  
• What happens when followings are heated:
  (a) Sodium- Format and Soda Lime
  (b) Sodium Acetate and Soda Lime
  
• Write two names of Woody and Non-Woody. Raw Material used in production of Pulp and Paper.

SECTION-II

Attempt any THREE questions.

5. (a) Discuss variation of Electrical Conductance along Periods and Groups in Periodic Table.
(b) Discuss the Peculiar Behavior of Lithium.

6. (a) Give Systematic Names to following complexes:
(i) [ Pt (OH)₂(NH₃)₄ ]SO₄
(ii) [ Cr(.OH)3(H₂O)₃ ]
(iii) K₂ [Cu (CN)₄]
(iv) [Fe ( H₂O )₆ ]
(b) Discuss any two components of Environment.

7. (a) Write a note on sp² Hybridization of Carbon explaining structure of Ethene.
(b) What products are formed when following compounds are treated with Ethyl Magnesium Bromide, followed by Acid Hydrolysis
(i) HCHO
(ii) CH₃CHO
(iii) (CH₃)₂CO
(iv) CO₂

8. (a) Prepare Ethane from Kolbe's Electrolytic Method. Also write down its Mechanism.
(b) Write laboratory and Industrial preparation for Acetaldehyde.

9. (a) Give the methods of preparation of Benzene on large scale (any four).
(b) Write I.U.P.A.C. names of followings: Compounds are given
(i) (CH₃)₃ – C– OH
(ii) CH₃ - O – CH₂- CH₂ – CH₃
(iii)  
(iv) (CH₃)₂- CH -- OH