Inter (Part-I) Multan Board 2013
Chemistry
Part I (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.

• For the reaction 2SO₂+O₂ ________ 2SO₃

(A) Kc = Kp
(B) Kc < Kp
(C) Kc > Kp
(D) Kc = Kp

• ________ million Tons ammonia is produced by Ha 's Process?

(A) 110
(B) 120
(C) 115
(D) 200

• Which one of the following pair of liquids is not completely Miscible?

(A) Alcohol end WNW
(B) Alcohol and Ether
(C) Phenol and Water
(D) Benzene and Cycloilexnne

• Which process is used for the extraction of Al?

(A) Castner-Kellner Process
(B) Thennite Process
(C) Hall-Beroult process
(D) Combustion Process

• Oxidizing Agent:-

(A) Is Oxidized
(B) Loses Enlacement
(C) Neither gains nor loss electron
(D) Gains Electrons

• The Hydrolysis of Sugar is catalyzed by:

  (A) Urease
  (B) Inverters
  (C) Zymass
  (D) Diastase

• The hight of the peaks in a mass spectrum show:

(A) Mass number of isotopes
(B) Relative abundance of isotopes
(C) Number of isotopes
(D) Number of protons

• The percentage of Nitrogen in Ammonias:

(A) 82.35 %
(B) 46.67%
(C) 92%
(D) 78%

• Which-one of the following is used as discoloring agent?

(A) Asbestos
(B) Conc. H₂SO₄
(C) Animal charcoal
(D) Silica gel

• The S.I unit of pressure is:.

(A) Torr
(B) m m Hg
(C) Nm^-3
(D) Pounds^-2

• The Carbon worn in diamond is:-

(A) sp3 hybridized
(B) sp hybridized
(C) dsp² hybridized
(D) sp^-2 hybridized

• Acetone and Chloroform are soluble in each other due to:-

(A) 1nterrnolecular Hydrogen bonding
(B) lon-dipole interaction
(C) Instantaneous dipole
(D) Dipole-induced dipole forces

• After filling of 4f , the entering electron goes into:-

(A) 5d
(B) 6p
(C) 6s
(D) 4d

• The positive particle produced in the discharge tube from Hydrogen gas was named Proton by:-

(A) Milliken
(B) Goldstein
(C) Rutherford
(D) Chadwick

• The dipole moment of SO₃ is:-

(A) 0.0D
(B) 0.12 D
(C) 0..95 D
(D) 0..78 D

• Which one of the followings has the highest bond order?.

(A) O₂⁺¹
(B) O₂⁺²
(C) O₂^-1
(D) O₂^-2

• The change in heat energy of a chemical reaction at constant temperature and pressure is called:-

(A) Enthalpy change
(B) Heal of sublimation
(C) Bond energy
(D) Internal energy change

Inter (Part-I) Multan Board 2014
Chemistry
Part I (Subjective)
Time Allowed: 2.10 Hours 
Max. Marks: 83

Section I

Q2. Attempt any eight parts. (8* 2=16)

• Why the Act MI yield is IC-SS titan the theoretical yield"
• Give the main Points rear the determination of Molecular Formula_
• How the Isotopes of an electron are separated by, mass spectrometer?
• Give the major steps for the complete ktuantitative _
• Define 'partition law' arid "chrommography?
• Give the Physical significance Van der Waals curiosities 'a' and 'b'.
• What is critical temperature and on what factors does it depend upon?
• Why the Real gases deviate from their idea behavior at low temperatures?
• Why different liquids possess different boiling points?
• How liquid crystal act as temperature sensors?
• Define Isomorphism. and Polymorphism,
• Why Ionic crystals do not conduct electricity in the solid state?

Q3. Attempt any eight parts. (8* 2=16)

• What is M0sley's Law and what is its significance?
• Explain Zee man Effect.
• Calculate the mass of electron when its e/m value is 1.7588x10¹¹CKg^-1.
• Define Hound’s Rule. Explain with example.
• Define Electro negativity. Give its trend in Periodic Table.
• Why MOT is superior to VBT.
• Compare the bond strengths of polar and non-polar molecules.
• Draw diagram of He-Molecule according to MOT. Also give its bond order.
• What is a thermo chemical equation? Give two examples.
• Define heat of Neutralization with example.
• Define pH and poH. How are they related pK_w.
• What are Acidic Buffers? Explain with example.

Q3. Attempt any six parts. (6 * 2=12)

• What is the effect of common ion on solubility? Give an example.
• justify that NaCl and KNO₃ arc used to lower the melting point of ice.
• Boiling point of liquids are increased when a solute in added to them Give reason.
• Find the polarity of a solution containing 41.4g of K₂CO₃ dissolved in 500 Cm₃ given solution, Molar mass of K₂CO₃ is 138g mol^-1. Give the reactions involved when Lead Accumulator (lead storage battery is discharged
• What is the difference between primacy and secondary cells?
• Briefly describe two electrolysis processes of industrial importance.
• Differentiate between Average and Instantaneous. rate of reaction.
• Give any four characteristics of Enzyme catalysis,

SECTION-II
NOTE: - Attempt any three questions.

Question #5
(a)Define Vapour Pressure and write down manometric method for its Determination. 4
(b) NH3 gas can be prepared by heating together two solid NH₄Cl and Ca(OH)₂ . if a mixture containing. 100g of each solid is heat then calculate the number of grams NH₃ produced
2NH₄Cl_(s) + Ca(OH)_2(s) —) CaCl ± 2 NH3_2(s)+ 2H₂O_(l)
Molar mass of NH₄Cl = 53.5 g mol^-1 and Ca(OH )₂= 74 g mol^-1

Question #6
(a) Define Hybridization of Atomic Orbital. Discuss sp³ hybridization in detail. Give two examples. 4
(b) Define and explain Hess's law of Constant Heat Summation, Explain it with one example, 4

Question #7
(a) How are Boyle's law and Charles law derived from Kinetic Molecular Theory of gases? 4
(b) Write four defects of Bohr's atomic Mole.

Question #8
(a) State rules for assigning Oxidation Number of elements with examples- 4
(b) N_2(g) and H_2(g) combine to give N H_3(g) .the value of K_c in this reaction at 500⁰ C is 6.0x10^-1 .Calculate the value of K, for this reaction. 4

Question #9
(a) Define the following terms:- (i) Parts per million (ppm) (ii) Azeotroprc mixtures (iii) Upper Consulate temperature (iv) Hydration energy
(b) Write' a brief note .on Energy of Activation 4

SECTION-III (PRACTICAL PART)

Question #10
NOTE - (i) Attempt any three parts. Write down standard solution, chemical equation with mole ratio, indicator with end paint. Procedure and supposed reading with Calculation. for part A, B & C. (1+1+1+ 1+ 1 ) =5. Write down material required, diagram and procedure for part D & E. (1+1+3)=5

(A) 10 gram mixture of NaOH and NaCl has been dissolved per dm³ of Solution. Calculate percentage composition of the mixture (Molecular mass of NaOH =40)

(B) 30 gram of partially oxidized sample of FeSO₄ .7 H₂O has been dissolved per dm³ of solution. Find out percentage oxidation of the sample (Molecular mass of FeSO4 . 7H₂O=278)

(C) determine the %age purity of Sodium Thiosulphate ( Na₂S₂O₃.5H₂O), 30 g of which has been dissolved per dm³ of solution. (Molecular mass of Na₂S₂O₃.5H₂O=248)

(D) Separate the mixture of inks by Paper Chromatography also calculates. its RF value?

(E) Purify commercial NaCl obtained from Khewara mine' passing HCl gas Through Common Ion Effect..