1ST YEAR CHEMISTRY chapter wise papers

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11th Chemistry Chapter Wise Tests

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1^ST YEAR CHEMISTRY CHAPTER NO. 1, 4, 6, 7, 9, 11

Q. 1:    Select the correct answer.   

1          The no. of moles of CO₂ which contain 8.0g of  oxygen  

            (a) .25                         (b) 0.50                      

            (c) 1.0                         (d) 1.5

2          27 g of Aluminium react completely with how much quantity of  O₂ to produce Al₂O₃

             (a) 8 g of O                (b)  32 g of O             

             (c) 16 g of O               (d) 24 g of O

3          Water boil at Murree :         
            (a) 98⁰C                       (b) 100⁰C                

            (c)  110⁰C       (d) 120⁰C

4           Which of the following liquids has the highest boiling point :

            (a)  Ethyl alcohol        (b) Acetone      

             (c) Water        (d) Benzene

5          The boiling point of liquid depends upon  :

            (a) Amount of  liquid  (b) External pressure    

            (c) Time of heating             (d) Device of heating

6          At equilibrium state rate of  evaporation and rate of condensation are :

            (a) Very high  (b) Very low     (c) Equal      

            (d) Can never be equal

7          Which type of hybridization has maximum S- character:

             a) SP            (b) SP₂   
            (c) SP₃              (d) dsp²

8            The value of activation energy is primary determind by
(a) temperature                       (b) collision frequency          

(c) concentration of reaction  d) chemical nature of reactions and products

9          What is Dipole moment in a hypothetical compound A⁺¹B^-1 if distance b/w them is 100 pm?

(a)    4.8 D                    (b)  1.69                       

 (c) 1.03                 (d) 0.12

10       Which type of chemical bond is directional in nature:

            (a)  Ionic bond (b) Covalent bond        

            (c) Metallic bond       (d) none of these

11        First law of thermodynamic is also called:

            (a)  Henry’s law           (b) Coulomb law    

            (c) Law of conservation of energy           (d) Hess’s law 

12        The sum of all kinds of energies in a system is called:

(a)   Enthalpy   (b) internal energy       
(c)       K.E      (d) P.E

13        How many water of crystallizations are present in MgSO₄:

            (a)  2                (b) 5                 

            (c)       7           (d) 10

14        Which of the following salt is not hydrolysed:

            (a) CuSO₄                  (b)  Na₂SO₄                  

            (c) NaCl                     (d) AlCl₃

15        Which of the following show continuous solubility curve:

            (a)  NaCl                                (b) NaNO₃     

            (c)       Na₂SO₄.10H₂O         (d)  Both (a) and (b)

16        The active masses of the substances in a large excess methods
(a)remain constant thought                (b) remain in large amount           

(c) remain in small amount                (d) remain fluctuating

17        The unit of rate constant is same as that of the rate of reaction in
(a) first order reaction            (b) second order reaction       

(c) zero order reaction            (d) third order reaction

Section – I

Q. 2:    Give the short answers of the following questions:                                             

      1         Law of conservation of mass can be obeyed during stoichiomertic calculation? 

      2         Why actual yield is always less than theoretical yield?

      3         Define limiting reactant and how limiting reactant are identified.

      4         Boiling point of water is different at murree  and mount everest how?

      5         Heat of sublimation of iodine is greater than other halogens why?

      6         Graphite is a good conductor of electricity although carbon is non metal why?

      7                              Why atomic radius can not be determined precisely; suggest suitable reasons?

      8                              Define bond energy; why bond energy of HF is greater than HI.

      9                              Draw structure of Ammonia by hybridization?

   10                             Strength of non polar bond is greater than non polar bond Why?

   11          Boiling point of solvent increases due to presence of solutes? Give reasons

   12          Differentiate between hydration energy and salvation energy?

   13                              What are the ebullisocopic and Cryoscopic constants?        

   14         Define conjugate solution and critical solution temperature?

   15         Name natural process which are endothermic in nature .

   16         Differentiate between homogeneous and heterogeneous catalysis.

   17         What do you mean by catalytic poisoning justify it with two examples

   18          Define specific heat and give its unit and equation.

   19         In list the name of methods to determine order of reaction?

   20         What do you mean by pressure volume work; justify it.

   21         What is the effect of temperature on molar and molal solution?

   22         What are pseudo first order reactions?

Section – II

Q. 3:    (a)       Define and explain liquid crystal also write its applications.                          

(b)       An unknown metal M reacts with S to form a compound with a formula M₂S₃. If 3.12g of M reacts with exactly 2.88g of Sulphur, what are the names of metal M and the compound M₂S₃?

Q. 4:    (a)       Define ionization potential and it is affected in periodic table

(b)       Define Born Haber cycle; calculate lattice energy of NaCl.              

Q. 5:    (a)       Discuss physical method for measurement of rate of reaction.

(b)       Give graphical explanation for depression of freezing point of a solution?    

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