Thursday, 11 November 2021

MODEL TEST PAPER /GUESS PAPER 10+2 CHEMISTRY, DOWN LOAD HERE




MODEL TEST PAPER CLASS XII CHEMISTRY (TERM -1) ( FOR PSEB/ CBSE) 

NOTE: THERE WILL BE 35 multiple choice questions in the paper.

All questions are compulsory 


To see answer key, click here

 Q1. For a non electrolyte solution Van't Hoff factor is 

  • (a) 1 
  • (b) 2
  • (c) 3
  • (d) 4 

Q2. When a nonvolatile solute is added in volatile solvent the 

  • (a) Lowering of vapour pressure occurs
  • (b) Elevation in boiling point 
  • (c) Depression in freezing point 
  • (d) All of these. 

Q3. The osmotic pressure of 0.2 molar solution of urea 300K ( R=0.082 litre atm `mol^{-1}``K^{-1}` is 

  • (a) 1 atm
  • (b) 4.92 atm  
  • (c) 0.25 atm
  • (d) 27 atm

 Q4. What will be the molarity of 30 mL of 0.5 M  `H_{2}`S`O_{4}` solution diluted to 500ml?

  • (a) 0.3 M
  • (b)  0.03M 
  • (c) 3M
  • (d)  0.103M 
Hint

use `M_{1}``V_{1}` = `M_{2}``V_{2}` 


Q5. Which is supplied at the cathode of fuel cell? 

  • (a) `H_{2}`
  • (b) `N_{2}`
  • (c) `O_{2}`  
  • (d) `Cl_{2}`  


 Q6. Molar conductance ...........with dilution, 

  • (a) decreases 
  • (b) Remains constant
  • (c) Increases 
  • (d) None of these

 Q7. The e.m.f of the cell reaction Zn(s) + `Cu^{+2}`(1.0M) → Cu(s) + `Zn^{+2}` at 25℃ is  1.3V, `E^{0}` for cell reaction 

  • (a) 1.27 V 
  • (b) 1.21 V
  • (c) 1.31V
  • (d)  1.30V


Q8. The conductivity of 0.20M solution of KCL  at 298K is 0.0248 S `cm^{-1}`

  • (a) 120 oh`m^{-1}``cm^{2}``mol^{-1}`
  • (b) 118 oh`m^{-1}``cm^{2}``mol^{-1}`
  • (c) 124 oh`m^{-1}``cm^{2}``mol^{-1}`   
  • (d) 130 oh`m^{-1}``cm^{2}``mol^{-1}`


Q9. The rate of chemical reaction  

  • (a) Increases as the reaction proceeds
  • (b) decreases as the reaction proceeds 
  • (c) May Increases/decrease  during reaction 
  • (d) Remains constant as the reaction proceeds  


Q10. Order and molecularity have same value  

  • (a) Unimolecular Reaction 
  • (b) Bimolecular Reaction 
  • (c) Elementary Reaction  
  • (d) Trimolecular Reaction 


Q11. The half life of the first order reaction having rate constant K= 1.7 x 10`10^{-5}``S^{-1}`

  • (a) 12.1 h
  • (b) 9.7h
  • (c) 11.3h  
  • (d) 1.8h 


Q12. The rate constant for a zero order reaction is 0.0030 `mol^{-1}``S^{-1}`. During which time, the initial concentration will fall from 0.10M to 0.0075M.

  • (a) 9.33 sec
  • (b)  7.05 sec
  • (c) 8.33 sec 
  • (d) None of these 

Q13. A reaction X →Y follows second order kinetics. If concentration of X is increased three times, the rate of formation of Y becomes .... 

  • (a) 3 times  
  • (b) 9 times 
  • (c) 2 times 
  • (d)  6 times 

Q14. Which of the following is correct related to chemical adsorption?  

  • (a) Has weak Vander wall's  forces
  • (b) Reversible
  • (c) Highly selective in nature 
  • (d) forms multi molecular layers

Q15.  Milk is an example of colloidal system of 

  • (a) Gas in liquid 
  • (b)  liquid in liquid 
  • (c) Liquid in gas
  • (d)  Solid in liquid

Q16. Which of the following properties of colloids does not depend on the charge on the properties 

  • (a) Coagulation
  • (b) Electro-Osmosis
  • (c) Electrophoresis
  • (d) Tyndall effect 

Q17.  Addition of Ferric Chloride to Ferric Hydroxide results in 

  • (a) Peptization
  • (b) Protection
  • (c) Dialysis 
  • (d) None of these

Q18.  Formula of Galena is .......

  • (a) CuFe`S_{2}`
  • (b) PbS 
  • (c) ZnS
  • (d) HgS

Q19.  The method in which ore is treated with suitable reagent so as to make it soluble is called ...

  • (a)  Leaching   
  • (b) Magnetic separation
  • (c) Gravity separation
  • (d) None of these 

Q20.Which of the following elements does not form stable  diatomic molecules? 

  • (a) Iodine
  • (b) Phosphorus 
  • (c) Nitrogen
  • (d) Oxygen

Q21.  Basic character of hydride of 15 group elements decrease in order 

  • (a)  Sb`H_{3}` > P`H_{3}`> As`H_{3}`>N`H_{3}`
  • (b) N`H_{3}`> Sb`H_{3}` >  P`H_{3}`> As`H_{3}`
  • (c) N`H_{3}`> P`H_{3}`>  As`H_{3}`> Sb`H_{3}`  
  • (d) Sb`H_{3}`> As`H_{3}` > P`H_{3}`>N`H_{3}`

Q22.  Oxygen molecule exhibits 

  • (a) Para magnetism 
  • (b) Dia magnetism
  • (c) Ferro magnetism
  • (d) None of these

Q23.  Which hydride is least volatile 

  • (a) `H_{2}`O 
  • (b) `H_{2}`S
  • (c) `H_{2}`Te
  • (d) `H_{2}`Se

Q24.  The correct order of bond dissociation enthalpy of halogens

  • (a) `Cl_{2}`>`Br_{2}``F_{2}`>`I_{2}` 
  • (b) `Cl_{2}`>`I_{2}`>`Br_{2}`>`F_{2}`
  • (c) `F_{2}`>`Cl_{2}`>`I_{2}`>`Br_{2}`
  • (d) All are wrong

Q25.  What is the shape of  Xe`F_{4}`?

  • (a) Tetrahedral
  • (b) Octahedral
  • (c) Linear
  • (d) Square planner 

Q26. Complete hydrolysis of Xe`F_{4}` and Xe`F_{6}`  forms

  • (a) XeO`F_{3}` 
  • (b) XeO`F_{2}` 
  • (c) Xe`O_{3}`  
  • (d)  XeO`F_{4}` 

Q27.  Which element does not belong to 3d series of transition elements?

  • (a) Titanium
  • (b) Iron
  • (c) Palladium 
  • (d) Vanadium

Q28.  In 3d series of transition elements which elements exhibits largest number of oxidation states?

  • (a) Fe
  • (b) Mn       
  • (c) Cr
  • (d) CO

Q29.  d-blocks elements show high catalytic property due to 

  • (a) High enthalpy of atomization
  • (b) Para magnetic behaviour
  • (c) Colour of hydrate ions 
  • (d) Variable oxidation state  

Q30.  Which of the following will have higher magnetic moment?

  • (a) `Fe^{+2}`
  • (b) `Fe^{+3}`  
  • (c) `Zn^{+2}`
  • (d) `Sc^{+2}`

Q31.  Which of the following statement is not correct? 

  • (a) Atomic Radius of Zr and Hf are same due to lanthanoid contraction 
  • (b) In lanthanoid series, ionic radius decreases from `La^{+3}` to `Lu^{+3}`  A
  • (c)La`( OH)_{3}` is less basic than Lu`( OH)_{3}`.      
  • (d) La is an element of transition series rather than lanthanoids 

Q32.   La`( OH)_{3}` is ......... basic than  Lu`( OH)_{3}`.    

  • (a) more     
  • (b) less
  • (c) nearly same
  • (d) None of these

Q33.  What is the colour of `K_{2}` `Cr_{2}``O_{7}`     when it reacts with alkali?     

  • (a) Yellow 
  • (b) Red
  • (c) Green
  • (d) Orange

Q34.  Which of the following Isomerism is shown by `[Co(Br)(NH_{3})_{5}]`S`O_{4}` and `[Co(SO_{4})(NH_{3})_{5}]Br`

  • (a) Ionization isomerism 
  • (b) solvate isomerism 
  • (c) linkage isomerism
  • (d) Co-ordination isomerism

Q35.  Primary and secondary valency of platinum in [Pt `(en)_{2}` C`l_{2}`]

  • (a) 4,4
  • (b) 4,6
  • (c) 6,4
  • (d) 2,6




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