Inter (Part-I) Dera Ghazi Khan 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.

• One mole of an ideal gas S.T.P has equal to

(A)  22.414cm3          
(B) 22.414dm3             
(C) 222.414cm3              
(D) 2.24dm3

• Many elements have fractional atomic mass of Isotopes.

(A) The mass of atom is itself in fractional              
(B) atomic masses are average relative abundance
(C) Atomic masses are average masses of Isotopes
(D) atomic masses are average masses of Isotopes       

• A safe and reliable method for drying of crystals is

(A) Filter paper
(B) vacuum desiccators
(C) oven 
(D)  Beaker

• The value of General gas constant R  in dm3 atom K-1 mol-1 is

(A) 62.4       
(B) 0.0821      
(C) 624.00      
(D) 1.987

• At the top of Mount Everest Water Boils at

(A) 1000 C   
(B) 120 °C      
(C) 69 °C        
(D) 110 °C

• The structure of NO 3-1 ion is

(A) Square planner  
(B) Triangular
(C) Tetrahedral
(D) Pentagonal

• Fast neutrons move with an energy

(A) I eV
(B) 1.4 eV
(C) 1.2 Mev
(D) 0.2 Mev

• The compromise Bond distance of two Hydrogen atoms is 

(A) 74.4 Pm             
(B) 75.4 Pm                
(C) 71.4 Pm                 
(D) 78.4 Pm

• Ionization energy of Hydrogen atom in KJ mole-1 is 

(A) 1313.31              
(B) 1336.31                
(C) 1321.31                 
(D) 1200

• First Ionization Energy of Magnesium atom is

(A) 1451 KJ mole^-1 
(B) 7730 KJ mole^-1      
(C) 738 Kjmole^-1
(D) 1130 Kjmole^-1

• For a given process,  The heat charges at constant pressure (qp) and at constant volume (qv) are related to  each other has

(A) qp= qv   
(B) qp < qv      
(C) qp > qv
(D) qp = qv/2

• Kc value for the decomposition of HE at 2000 °C is 

(A) 10-13                  
(B) 1055            
(C) 10-20                      
(D) 10-16

• Acidic Buffer solution has HF value at

(A) Less than seven    
(B) greater than seven
(C) equal to seven
(D) equal to bight

• Water of crystallization of Oxalic Acid is

(A) 2                          
(B) 10                         
(C) 7               
(D) 6

• A typical car battery of 12 volts has number of cells 

(A) 4                          
(B) 3                           
(C) 6                
(D) 2

• If a strip of Cu metal is placed in solution of FeSO4

(A) Cu will be deposited                     
(B) Fe is precipitated out
(C) Cu and Fe both dissolve               
(D) No reaction takes place

• Lithe rate equation of reaction 2A + B → products is rate = k [A]2[B] and "A" is present in large  Excess, the order of reaction is

(A) 1                           
(B) 2                            
(C) 3                           
(D)1.5

Inter (Part-I) Dera Ghazi Khan Board 2013
Chemistry
Part I (Subjective)
Time Allowed: 2.10 Hours 
Max. Marks: 83 

Section I

Q2 Write short answers any Eight (8) questions of the following                          16

• Write four steps for determining empirical formula
• Calculate number of water molecules in 9 g of ice
• Give the main characteristics of the solvent used for crystallization
• What is distribution coefficient? To which technique it is applied ?
• High pressure and low temperature make the gases non-ideal. Explain why?
• Define plasma state  ,  Give its one application
• Evaporation takes place at all temperatures. Give reason
• Draw the shape of unit cell mentioning angles and axes
• Why nitrogen molecule is diamagnetic?
• Differentiate between exothermic reaction and endothermic reaction
• What are spontaneous and non-spontaneous processes?
• What is Kw ?  What is the effect of temperature on the value of Kw?

Q3 Write short answers any Eight (8) questions of the following                         16

• Define stoichtometry and mole
• How marine life survive beneath ice in winter?
• What is polymorphism ?
• How it can be justified that cathode rays navel in straight line?
  (5)        What is Hund's rule? Give example
  (6)        What is coordinate covalent bond?
  (7)        How electronegativity difference between two bonded atoms decides the nature of bond
  (8)        How value of Kc can predict the direction of a reaction?
  (9)        Differentiate between Molarity and molality
  (10)      What is phenol water system?
  (11)      What are the rules for assigning oxidation sate?
  (12)      What is NICAD battery?

Q4 Write short answers any Six (6) questions of the following                         12

• (I)        Write down any Two properties of gases
  (2)        What is reason for the production of positive rays?
  (3)1      Briefly explain experimental verification of dual nature of matter
  (4)        Differentiate briefly between SP2 and SP hybridization
  (5)        What are buffer solutions?
  (6)        What is parts per million (PPm) concentration unit of solutions
  (7)        Write down any two rules for balancing of redox equations by ion-electron method
  (8)        Differentiate between negative catalysis and autocatalysis
  (9)        Write down any two characteristics of a catalyst

SECTION  II

Note: Attempt any Three questions from this section (8*3=24)

Question #5
(a)    What is a limiting reactant? Explain with one example and how it is identified                 4
(b) Give defects of Bohr's Atomic model                                                                                4

Question #6
(a) Derive Van der Waal's equation for real gases. What is the physical significance of Van der  Waal's constants. Give their units          4
(b)  Discuss structure of ammonia molecule in the light of YBT                                               4

Question #7 
(a)   Define molecular solids and give their properties                                                             4
(b) Define first law of thermodynamics and prove that ∆H = qp                                               4

Question #8
(a) The solubility of CaF2 in water at 25 °C is 105 x 10-4 mot dm3 . What is the solubility product of CaF2           
(b) Define Oxidation Number. Describe the general rules for assigning oxidation number          4

Question #9
(a) Describe one method to determine the boiling point elevation of a solution                         4
(b) What are enzymes? Give examples in which they act as catalyst. Mention the characteristics of Enzyme catalysis           4