Wednesday, 6 July 2016

chemistry first year chap#1 complete lahore board 2016



      Academy for Excellence chung Lahore
Chemistry-1st 09-10 Ch# 1                                   Paper: Complete Without Prob of Exercise                                               Total Marks: 20
Name: ______________________________________________________Sec: ______________Roll: _________________
A.         Choose the correct answer
1.            Atoms of which gas can exist independently  
                                a. O2                                       b. CO2                    c. Ar                       d. N2
2.            Atomicity of glucose (C6H12O6) is
                                a.6                                          b. 24                      c. 12                      d. 18
3.            There are many examples of anions having group of atoms like
                                a. PO(3–)4                                   b. Cl(–)                       c. P(–)                         d. S(–2)
4.            Which of the following is a charged particle
                                a. Element                          b. Ion                    c. atom                 d. Molecule
5.            Carbon is used as standard reference for relative atomic mass due to
                                a. unstability of carbon                                b. stability of carbon
                                c. abundance of carbon compounds      d. both b + c
6.            Which of the following is not a property of Isotopes
a. Isotopes have same chemical properties
b. Isotopes have same atomic Number
c. Isotopes have same physical properties
d. Isotopes have same position in periodic table
7.            Which of the following statement is true for mass spectrometer
a. It uses liquid molecules in magnetic field
b. Magnetic field supply the voltage to vapours
c. It separates Ions according to their mass only
d. All Statements are wrong
8.            A potential difference of 500 – 2000 volts is applied to accelerate the positive Ions by
                                a. electric field                  b. magnetic field             
c. Ionization chamber d. electrometer                 
9.            By combustion analysis, only those organic compounds can be analyzed which simply contain
                                a. C , S , N                             b. C , H , O            c. C , H , N            d. S , H , O
10.          In elements and compounds, the Avogadro’s No correlates the Number and masses of
                                a. Atoms                              b. Ions                  c. Molecules       d. All
11.          Which statement about molar volume is true?
                                a. it is denoted  by Vm   b. It is applicable only to an ideal gas
                                c. normally in gases, one molecule is about 300 times at a greater distance
                                  than its own diameter
d. All are true
12.          Theoretical yield is also called
                                a. expected yield              b. calculated yield          c. both a + b       d. none
13.          The mass of one mole of electrons is
                                a. 1.008 mg                        b. 0.55 mg                           c. 0.184 mg        d. 1.673 mg
14.          27 g of Al will react completely with how much mass of O2 to produce Al2O3
a. 8g of oxygen                                 b. 16g of oxygen             
c. 32g of oxygen               d. 24g of oxygen
15.          The number of moles of CO2, which contain 8.0 g of oxygen
                                a. 0.25                                  b. 0.50  c. 1.0                     d. 1.50
16.          The largest numbers of molecules are present in
                                a. 3.6 g of H2O   b. 4.8g of C2H5OH            
c. 2.8 g of CO      d. 5.4 g of N2O5
17.          One mole of SO2 contains
                                a. 6.02 x 1023 atoms of oxygen b. 18.1 x 1023molecules of SO­2
                                c. 2 x 6.0223 atoms of sulphur    d. 2 x 6.0223 atoms of oxygen
18.          The volume occupied by 1.4g of N2 at S.T.P is
                                a. 2.24 dm3                         b. 22.4 dm3                         c. 1.12 dm3         d. 112 cm3
19.          One atom mass unit is equal to
                                a. 1.66 x 10–27 kg              b. 1.66 x 10–27 g                c. 1.66 x 10–24 g                d. Both a + c
20.          Which of the following has eleven isotopes
                                a. Ni                                       b. S                                         c. Cd                      d. Sn


Give Short Questions                                                                                                                                                              
a). Why we use limiting reactant deliberately
b). What is gram molecule. Give two example
c). What is Gram molecule. Give two examples
d). How empirical formula is determined.
Q#2.     Explain in detail mass spectrometry

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Give Short Questions                                                                                                                                                              
a). Why we use limiting reactant deliberately
b). What is gram molecule. Give two example
c). What is Gram molecule. Give two examples
d). How empirical formula is determined.
Q#2.     Explain in detail mass spectrometry

-----------------------------------------------------------------------------------------------------------------------------------------

Give Short Questions                                                                                                                                                              
a). Why we use limiting reactant deliberately
b). What is gram molecule. Give two example
c). What is Gram molecule. Give two examples
d). How empirical formula is determined.
Q#2.     Explain in detail mass spectrometry

-----------------------------------------------------------------------------------------------------------------------------------------

Give Short Questions                                                                                                                                                              
a). Why we use limiting reactant deliberately
b). What is gram molecule. Give two example
c). What is Gram molecule. Give two examples
d). How empirical formula is determined.
Q#2.     Explain in detail mass spectrometry


-----------------------------------------------------------------------------------------------------------------------------------------


Give Short Questions                                                                                                                                                              
a). Why we use limiting reactant deliberately
b). What is gram molecule. Give two example
c). What is Gram molecule. Give two examples
d). How empirical formula is determined.
Q#2.     Explain in detail mass spectrometry

-----------------------------------------------------------------------------------------------------------------------------------------

Give Short Questions                                                                                                                                                              
a). Why we use limiting reactant deliberately
b). What is gram molecule. Give two example
c). What is Gram molecule. Give two examples
d). How empirical formula is determined.
Q#2.     Explain in detail mass spectrometry


-----------------------------------------------------------------------------------------------------------------------------------------


Give Short Questions                                                                                                                                                              
a). Why we use limiting reactant deliberately
b). What is gram molecule. Give two example
c). What is Gram molecule. Give two examples
d). How empirical formula is determined.
Q#2.     Explain in detail mass spectrometry
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Tuesday, 5 July 2016

physics 1st year past paper lahore board 2016



Academy  For  Excellence  Chung
 
                   Test –physics                                                     total  no # 20
1.   The horizontal range of a projectile is the same for the angles     
     (a) 600 and 800                        (b) 400 and 700       
(c) 450 and 550                               (d) 400 and 500
2.   A ball of mass m moving with uniform speed collides elastically with another stationary ball. The incident ball will lose maximum kinetic energy if mass of the stationary ball is
          (a) m                                                 (b) 2 m
          (c) 4 m                                              (d) Infinite 
3.   A coin is tossed vertically upward with a velocity of 19.6 m/s. Approximately how high will it rise?
          (a) 15 m               (b) 20 m             (c) 25 m                  (d) 30 m

4.   Forces in nature always occur in       
     (a) single form                         (b) pair form 
(c) triple form                           (d) any form
5.   A body moving with velocity v has energy E. Its momentum is
     (a)                              (b)                   (c)                   (d) 
SHORT QUESTIONS
1.       Describe Inertia.
2.       At what angle the range of the projectile is Maximum? Verify your answer.
3.       What is an isolated system? Explain it with an example.
4.       What is ballistic Missile and Ballistic Trajectory?
5.       Describe Time of the projectile.
LONG QUESTIONS
a)      Write a note on Projectile motion.
b)      A ball is thrown horizontally from a height of 10 m with velocity of 21 ms-1 . How far off it hit the ground and with what velocity?


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