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
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
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
