Inter (Part-II) Sahiwal Board 2016
Chemistry
Part II (Objective Type)
Time Allowed: 20 Minutes 
Max. Marks: 17

Note: You have four choices 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.

Question #1
Circle the correct option i.e. A/B/C/D. Each part carries one mark.

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) Na⁺ is smaller than Na atom
(b) Na⁺ is larger than Na atom
(c) Cr^- is smaller than Cl atom
(d) Cr^- (ion) and CI (atom) are equal in size

• Chile saltpetre has chemical formula:

(a) NaNO₃                 
(b) KNO₂                    
(c) Na₂ B₄O₇             
(d) Na₂CO₃. H₂ O

• Tincal is a mineral of:

(a)Al                           
(b)B                            
(c) Si                          
(d) C

• Laughing gas is chemically:

(a) NO                        
(b) N₂O                      
(c) NO₂                      
(d) N₂O₄

• Which is the strongest acid?

(a) HClO                    
(b) HClO₂                   
(c) HClO₃                
(d) HClO₄

• Which of the following is non-typical element?

(a) Cr                          
(b) Mn                        
(c) Zn                         
(d) Fe

• The state of hybridization of carbon atom in methane is:

(a) sp³                         
(b) sp²                         
(c) sp                          
(d) dsp ²

• Preparation of vegetable ghee involves:

(a) Halogenation        
(b) Hydrogenation     
(c) Hydroxylation      
(d) Dehydrogenation

• Which of the following acid can be used as a catalyst in Friedel - Crafts reactions?

(a) AlC1₃                   
(b) HNO₃                   
(c) BeC1₂                   
(d) NaCI

• SN2 reactions can be carried out with:

(a) Primary alkyl halides                   
(b) Secondary alkyl halides
(c) Tertiary alkyl halides                   
(d) All of these

• Which compound is called a universal solvent?

(a) H₂O                      
(b) CH₃OH                
(c) C₂ H₅ OH              
(d) CH₃ — 0 —CH₃

• Which of the following will have highest boiling point?

(a) Methanol              
(b) Ethanol                 
(c) Propanol               
(d) 2- hexanone

• Acetic acid is manufactured by:

(a) Distillation            
(b) Fermentation        
(c) Ozonolysis            
(d) Esterification

• Which is a synthetic polymer?

(a) Animal fat            
(b) Starch                   
(c) Cellulose               
(d) Polyester

• Phosphorus helps the growth of:

(a) Root                      
(b) Leave                    
(c) Stem                     
(d) Seed

• Xvi-Ecosystem is a smaller unit of:

(a) Lithosphere           
(b) Hydrosphere         
(c) Atmosphere          
(d) Biosphere

• A single chloride free radical can destroy how many ozone molecules.

(a) 100                        
(b) 100000                 
(c) 10000                   
(d) 10

Inter (Part-II) Sahiwal Board 2016
Physics
Part II (Subjective)
Time Allowed: 3.10 Hours 
Max. Marks: 83

Section I

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

• How electron affinity does vary in a group of the periodic table?
• Alkali metals give ionic hydrides. Give brief reason.
• Why lime water turns milky with CO₂ but becomes clear with excess CO₂?
• What happens when Beryllium is treated with sodium hydroxide?
• What is chemical garden?
• Give reaction of H₃BO₃ with C₂H₅OH
• Why is SO₃ dissolved in H₂SO₄ and not in water?
• P₂O₅ is a powerful dehydrating agent. Prove giving two examples.
• What are Freons and Teflon?
• Why HF is weaker acid than HCI?
• How does the process of galvanizing protect iron from rusting?
• What is coordination sphere? Give an example.

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

• Describe tautomerism with an example.
• What are Alicyclic and Aromatic Compounds? Also write an example in support of your answer.
• Describe nitration of methane.
• Describe a test for the presence of unsaturation in organic molecules.
• Write down mechanism of Alkylation of benzene.
• Write two addition reactions of benzene.
• Describe mechanism of E² reactions of Alkyl halide.
• Define electrophile and nucleophile with examples.
• Describe a method for preparation of phenol from sodium salt of benzene sulphonic acid.
• Describe Lucas Test for distinction of secondary and tertiary alcohols.
• How is acid rain harmful for fishes and humans?
• Describe natural sources of methane (hydrocarbon) in atmosphere.

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

• How will you distinguish between 2-pentanone and 3-pentanone?
• Write general mechanism for acid catalysed addition reactions of carbonyl compounds.
• What is a peptide bond? Write down the formula of a dipeptide.
• Write equations to show acidic and basic characters of Amino acids.
• What are fertilizers? Why are they needed?
• Name four non-woody raw materials used for pulp and paper formation.
• Define saponification number and Iodine number.
• Differentiate between oils and fats.
• Write four uses of Lipids.

SECTION-II:

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

Question #5
(a) What is Mendeleev's periodic table? Discuss improvement in Mendeleev's periodic table.
(b) (i) Give the reaction of sodium with oxygen. (ii) Give reaction of Mg with N₂ followed by its hydrolysis.

Question #6
(a) What are silicons? Give its formula. Write any four uses of silicones.
(b) Write down reactions of CaOC1₂ with (i) CO₂     (ii) HCI      (iii) NH₃     (iv) H₂SO₄

Question #7
(a) Define and explain sp - hybridization with an example.
(b) Compare E² and E^-1 mechanism for the β- Elimination reactions?

Question #8
(a) Write two methods for the preparation of Alkanes from Alkyl halides.
(b) Describe reactions of ethanal and propanone with (i) Hydroxylamine        (ii) Phenylhydrazine

Question #9
(a) Write the Friedel-Crafts Alkylation reaction of Benzene with mechanism.
(b) How phenol is prepared by Dow's method and from Benzene Sulphuric Acid? Show by equations.

SECTION-II

Attempt any THREE questions.   (5 x 3 = 15)

• Write complete qualitative analysis for Zn⁺² radical in a systematic manner.
• Write complete qualitative analysis for Na⁺¹ radical in a systematic manner.
• Write complete qualitative analysis for Cl^-1 radical in a systematic manner.
• How will you identify and confirm phenolic functional group in an organic compound?
• Write the material required, equation and procedure for preparation of copperamine complex.