Class XII
Chemistry
( By - Abhishek Sir )
(For all Boards and competitive exams like JEE , UPTU etc)
Q.1. What is SI unit of molar conductance?
A. S m2 mol-2
B. S m mol-1
C. S m2 mol-1
D. S2 m mol
Q.2 Which one of the option is correct for both bauxite (Al2O3.2H2O) and clay (Al2O3.2SiO2.2H2O)?
A. Bauxite is ore but clay is a mineral
B. Clay is ore but bauxite is mineral
C. None of them are ores
D. Both clay and bauxite are ores
Q. 3. What is the correct IUPAC name for diethylbromomethane?
A. 1-Bromo-1, 1-diethylmethane
B. 3-Bromopentane
C. 1-Bromo-1-ethylpropane
D. 1-Bromopentane
Q. 4. What is the product formed during Dow’s process?
A. Ethanol
B. Benzaldehyde
C. Phenol
D. Methane
Q. 5. The decomposition of N2O5 according to the equation,
2N2O5 (g) →4NO2 (g) + O2 (g) is a first order reaction.
After 30 min from the start of the decomposition in closed vessel,
the total pressure developed is found to be 284.5 mm of Hg and on complete decomposition,
the total pressure is 584.5 mm of Hg. What is the rate constant of the reaction?
2N2O5 (g) →4NO2 (g) + O2 (g) is a first order reaction.
After 30 min from the start of the decomposition in closed vessel,
the total pressure developed is found to be 284.5 mm of Hg and on complete decomposition,
the total pressure is 584.5 mm of Hg. What is the rate constant of the reaction?
A. 5.2x10-3 min-1
B. 5.2x10-3 seconds
C. 2.5x10-3 min-1
D. 6.9x10-3 min-1
Q.6. Which of the following pair of transition metal ions are the stronger oxidizing agents in aqueous solutions?
A. V2+ and Cr2+
B. Ti2+ and Cr2+
C. Mn3+ and Co3+
D. V2+ and Fe2+
Q. 7. Give the complete chemical equation for following reaction
MnO4- +NO2-+H+→
A. 2MnO4- +5NO2- +6H+→2Mn2+ +5NO3- +3H2O
B. 2MnO4- +5NO2- +3H+→2Mn2+ +5NO3-+H2O
C. MnO4- +5NO2- +6H+→Mn2+ +5NO3-+H2O
D. 2MnO4- +NO2- +6H+→Mn2+ + NO3- +3H2O
Q. 8.What is the difference between DNA and RNA?
A. DNA occurs mainly in the nucleus of the cell and RNA occurs in the cytoplasm of the cell.
B. DNA occurs in the cytoplasm of the cell and RNA occurs in the nucleus of the cell
C. DNA has property of replication while RNA does not replicate
D. Both A and C
Q. 9. What is the process employed for the concentration of sulphide ore?
A. Froth Flotation
B. Roasting
C. Electrolysis
D. Calcination
Q. 10. Which of the compound does not undergo hydrolysis by SN1 mechanism?
A. C6H5Cl
B. C6H5CH2Cl
C. C6H5CH (CH3)Cl
D. C6H5CH (C6H5)Cl
Q. 11. What product is obtained when glucose reacts with bromine water?
A. Saccharic acid
B. Sorbitol
C. Glucaric acid
D. Gluconic acid
Q. 12. Which one of the among is correct expression for conductivity?
A. Conductivity = Conductance x Cell Constant
B. Conductivity = Resistance x Cell Constant
C. Conductivity = Conductance/Cell Constant
D. Conductivity = Conductance x Cell Constant2
Q. 13. Which of the following statement is correct for explaining the structure of PH3?
A. It has one doublet linkage.
B. It shows sp3 hybridization.
C. Axial bonds are shorter than equatorial bonds.
D. Shape is tetrahedral.
Q. 14. Which of the following is the rate determining step in acid catalyzed hydration of CH3CH=CH2?
A. CH3CH=CH2 + H2O→ (CH3)2C+H + H2O
B. CH3CH=CH2 + H2O→ (CH3)2C-H + H2O
C. CH3CH=CH2 + H2O→ CH3CH2C+H2 + H2O
D. CH3C+H-CH3 +H2O→ CH3-CH(OH)-CH3 +H3O+
Q. 15. Which of the following options is the correct arrangement of the given organic compounds in increasing order of their boiling points?
CH3CH2CH2CHO, CH3CH2CH2CH2OH, C2H5-O-C2H5, CH3CH2CH2CH2CH3
A. CH3CH2CH2CHO < C2H5-O-C2H5 < CH3CH2CH2CH2CH3 < CH3CH2CH2CH2CH3
B. CH3CH2CH2CH2CH3 < C2H5-O-C2H5 < CH3CH2CH2CHO < CH3CH2CH2CH2OH
C. CH3CH2CH2CH2OH< CH3CH2CH2CH2CH3 < CH3CH2CH2CHO< C2H5-O-C2H5
D. CH3CH2CH2CH2CH3 < CH3CH2CH2CHO< CH3CH2CH2CH2OH< C2H5-O-C2H5
Q. 16. The polymer (-CH2-CH=CH-CH2-CH2-CH-C6H5)n falls in which category?
A. Copolymer
B. Homopolymer
C. Condensation polymer
D. none of the above
Q. 17. Which type of defect is shown by AgBr?
A. Schottky Defect
B. Frenkel Defect
C. Vacancy Defect
D. Interstitial Defect
Q. 18. What are ligands?
A. The neutral molecules or ions bound to the central atom or ion in the coordination entity.
B. Formation of unstable complex by bidentate ligands.
C. The positively charged molecules or ions bound to the central atom or ion in the coordination entity.
D. None of the above.
Q. 19. What will be the correct arrangement of the following in increasing order of acidic strength?
m-nitrophenol, m-Cresol, Phenol, m-Chlorophenol
A. m-Cresol< Phenol< m-Chlorophenol< m-nitrophenol
B. m- Nitrophenol< Phenol < m-Chlorophenol< m-Cresol
C. m-Cresol< m-nitrophenol< m-Chlorophenol< Phenol
D. Phenol< m-nitrophenol< m-Chlorophenol< m-Cresol
Q. 20. What is the correct order of increasing bond angles in the following species?
A. Cl2O<ClO2-<ClO2
B. ClO2-<Cl2O<ClO2
C. Cl2O<ClO2<ClO2-
D. ClO2<Cl2O<ClO2-
Q. 21. The density of lead is 11.35 g cm-3 and the metal crystallizes with fcc unit cell.
Estimate the radius of lead atom. (At. Mass of lead=207 g mol-1 and NA=6.02x1023 mol-1)
Estimate the radius of lead atom. (At. Mass of lead=207 g mol-1 and NA=6.02x1023 mol-1)
A. 174.96 m
B. 174.96 pm
C. 174.96 cm
D. 74.9 pm
Q. 22. What is the process due to which colloidal particles exhibit Tyndall effect?
A. Polarization of light
B. Scattering of light
C. Reflection of light
D. Refraction of light
Q.23. What is the role of graphite rod in the electrometallurgy of aluminium?
A. Act as a solvent
B. For reduction of alumina to aluminium
C. Act as a flocculent to get rid of the fine particles
D. Both A and B
Q. 24. Name the reaction which undergoes oxidation and reduction simultaneously.
A. Reduction reaction
B. Disproportionation reaction
C. Redox reaction
D. Oxidation reaction
Q. 25. What is the correct IUPAC name of [Pt(NH3)2Cl2]?
A. Diamminedichloridoplatinum (II)
B. Diamminedichloridoplatinum (IV)
C. Diamminedichloridoplatinum (0)
D. Dichloridodiammineplatinum (IV)
Q. 26. In which of the following arrangements,
the sequence is not strictly according to the property written against it?
the sequence is not strictly according to the property written against it?
A. CO2<SiO2<SnO2<PbO2: Increasing oxidizing power
B. HF<HCl<HBr<HI: Increasing acid strength
C. NH3<PH<AsH3<SbH3: Increasing basic strength
D. B<C<N<O: Increasing first ionization enthalpy
Q. 27. Which of the following does not give Cannizzaro’s reaction?
A. p-NO2-C6H4-CHO
B. C6H5CHO
C. HCHO
D. CH3CHO
Q. 28 How can formic acid be distinguished from acetic acid?
A. By adding NaHCO3
B. By adding dil. acidified KMnO4 solution
C. By adding 2, 4-dinitrophenyl hydrazine
D. By adding K2Cr2O7 solution
Q. 29. What should be added to benzoic acid to convert it into ethyl benzoate?
A. Ethyl chloride
B. Dry HCl, C2H5OH
C. Alcoholic KOH
D. Sodium ethoxide
Q. 30. If the concentration is expressed in 
and time in seconds,
the units of the rate constants for the first order and the third order reaction respectively are:
and time in seconds,the units of the rate constants for the first order and the third order reaction respectively are:
A. mol L-1 s-1 and L mol-1 s-1
B. s-1 and L2 mol-2 s-1
C. mol L s-1 and mol-1 L s-1
D. mol L-1 s-1 and mol L s-1
NOTE - Answers will be added in next test series paper -02 , solve the questions if you have problems comment here.
Follow us on facebook page here-
x
No comments:
Post a Comment