SOLUTION AKUEB of Paper I of XI year (MCQS) 2014

CLASS XI FINAL TERM EXAMINATION 2014

Chemistry Paper I

1^ST SHIFT

Max. Marks: 30                                                                                       Time: 40 minutes

 

Solution

1. The largest number of molecules is present in

            A. 3.6g of H₂O

            B.  4.8 g of C₂H₅OH

            C. 2.8 g of CO           

            D.  5.4 g of N₂O₅

2. A limiting reactant is the one which

            A .  is take is lesser quantity in gram as compared to other reactants

            B .  is take lesser quantity in volume

            C . give maximum amount of product

            D . give the minimum amount of the product   

3.One mole of (NH₄)₃PO₄ contains _?_ moles of hydrogen atoms.

A.    3

B.     6

C.     9

D.           12

4. The conclusion drawn from Rutherford’s a particle scattering experiment is

A.    Mass and energy are related

B.  Electrons occupy the outer space of nucleus

C.  Neutrons are situated inside the nucleus

      D.  The collision of matter can be established

_{5. Which of the following configurations represent the Gallium (Z=31)}

_{A.    .1s}²_{, 2s}²_{, 2p}⁶_{, 3s}²_,3p⁶_{, 3d}¹⁰_{, 4s}² ,_4p¹

_{B.     1s}²_{, 2s}²_2p⁶_{, 3s}²_3p⁶_{, 4p}¹ ,_3d¹⁰_{, 4s}²

_{C.  1s}²_{, 2s}²_2p⁶_{, 3s}²_3p⁶_{, 4s}² _,3d¹⁰_{, 4p}¹

D.    _1s²_{, 2s}²_2p⁶_{, 3s}²_3p⁶_{,  4s}²_4p¹ ,_{3 d}¹⁰

 6. Which of the following combination of quantum numbers is NOT possible?

_{A.    {3        2          -0}         ½}      

_{B.     {4        0          0}          ½_}

_{C. {3     2      -3}     ½_}

_{D.    {5        3          0          -}¹_/2}

7.  Molarity  of  pure water  is

A.  1.00    

B.  6.000

C.  18.00              

D.  55.55

8. The conjugate base of HSO₄^-1  is     (HSO₄^-1     →      H⁺  + SO₄^-2)

A. SO^2-₄      

B. SO^2-₃

C. H₂SO₄                  

D. H₂SO₃

9. Which of the following can be considered as an acid according to Lowry –Bornsted

theory?

A.OH^-                         

B. H₃O⁺

C. Cl^-           

D. HSO^-₄

10.From the molecular point of view molecules evaporate form the surface of a liquid if them:

A.  have sufficient K.E to overcome the attractive coerces in the liquid

B.     are attracted to other molecules in the vapor phase

C.     are in the state of dynamic equilibrium

D.    are repelled by other molecules in the liquid phase

11.The highest  temperature at which a liquid can coexist  in equilibrium with its

vapour is called:

A.  Melting point             

B.  Critical point

C.  Critical temperature  

D.  all of these

12. The smallest portion or the space of lattice which Show  the pattern of lattice is called

A.    Unit cell 

B.      Crystal lattice

C.  Space lattice   

D.  Cubic crystals

13. A solid in which the constituent structural units are arranged in definite

geometrical configuration, characteristic of the substance is known as

A.    Amorphous solid        

B. Crystalline solid

C.   Pseudo solid              

D.  Super cooled liquid

14.   

Experiment No.	Initial concentrations		Initial Rate of reaction Mol/dm3/hr
	[A]	[B]
01	0.10	0.02	10
02	0.10	0.03	15
03	0.2	0.02	20

 The rate law derived for the reaction from the above data is 

A. Rate law  =k [A][B]

B. Rate law  =k [A]²[B]

C. Rate law  =k [A] ² [B]^1/2

D. Rate law  =k [A]^1/2[B]²

15. A positive catalyst  can:

                

A. diminish the enthalpy of reaction

B. shift the equilibrium of reaction

C. makes a reaction thermodynamically more feasible

D. diminish the activation of reaction 

16.              If a system at equilibrium is disturb by some change, the system will shift so as to undo the effect of the changes this statement is known as

A.    Le- Chatelier’s principle      

B.     Law of mass action

C.  Graham’s law             

D.   Equilibrium Law

17.               At a temperature of about 425⁰C ,  H_{2 (g)} + I_2(g)  ↔ 2HI_(g)

the equilibrium mixture contain  [H₂] =0.10  ,[I₂]= 0.10 and [HI]= 0.70. If suddenly 0.050 mol/dm³ of H₂, 0.050 mol/dm3 of I₂ 0.350 mol/dm³ of HI were added , the result would be that:

                            

A. more HI would from

            B.  the equilibrium would be shifted to the right

            C.  More H₂  and I₂ would from 

D. No net Chemical change would occur

     

18. The hybridization of Chlorine   atom in HClO₄ molecule is

            A.  Sp                         

            B.  Sp²

            C.  Sp³                                        

                D.  Sp³d²

19. The geometrical  shape of SO₂ molecule is

            A . Tetrahedral                                   

            B . Triangular planer

            C .  Bent                        

            D . Linear

           

20.  Which molecule does have net dipole moment is Zero

            A .   CO₂                 

                B .   NH₃

            C.    H₂O                    

            D .   HCl        

21 . A real gas most closely approaches the behavior of an ideal gas under condition of :   

      A.  High pressure and low temp.

      B. Low pressure and high temp.

      C. Low pressure and low temp. 

      D. High pressure and high temp.

22. At sea level  boiling point of liquid, the vapour pressure of the liquid :                         

      A. is equal to 76cm of Hg

      B. differs for different substance

      C.  does not have a definite value vapour pressure at boiling

      D. is equal to 76 torr

23. The portion of matter under investigation is known as

            A .  System                                  

            B.  Surrounding 

            C .  States  function   

            D.  Intensive properties 

24. Hess’ law deal  with

            A .  heat change accompanying a chemical process

            B .  rate of chemical reaction

            C .  Equilibrium

            D.   Influence of temperature on reaction

           

25.  In a process a  1200 J heat   absorbed in a system a  while 200 J work done on the

system  the change in internal energy is

A.   1400 J 

B.     1000 J

C.   600 J        

D.   1600 J

26.       During rusting of iron, it gets

A.  Oxidized

B.     Reduced

      C.  Sublimed        

D.  Decomposed

                   

27.       The following reaction is a Redox reaction 

            S₂O₃^2-     +      I₂      +  OH^-                                              SO₄^2-  +  I^-    + H₂O

Which substance is act as oxidizing agent?

A.    S₂O₃²   

B.   I₂   

C.     OH^-      

D.    O₄^2- 

28.  The diagram shown the structure of        

 

A.    Hydrogen electrode   

B.  Voltaic cell

C.  Down’s cell    

D.  Nelson’s   cell

29. One molal solution of substance contain one mole of solute in:  

A. 1000 cm³ of solution   

B. 1000 cm³ of solvent

C. 1000 g of solvent         

D. 22.4 dm³  

30.The compositions of different solutions of sugar in water are below

 i) 10g of sugar dissolved in 100g of water = “P” solution

ii) 20g of sugar dissolved in 100g of water = “Q” solution

iii) 30g of sugar dissolved in 100g of water = “R” solution

            iv) 40g of sugar dissolved in 100g of water  =  “S”  solution

            which solution has highest boiling point  

             A.   “S” solution

             B.   “Q” solution     

             C.   “R” solution

             D.   “P” solution