Class/Course - Class XII

Subject - Chemistry

Total Number of Question/s - 4730


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  • 1. The Solid State - Quiz

    1. An elemental crystal has a density of 8570 kg m-3. The pacing efficiency is 0.68. If the closest distance between neighbouring atoms is 2.86 Å, the mass of one atom is (1 amu = 1.66 x 10-27kg)
    a) 186 amu
    b) 93 amu
    c) 46.5 amu
    d) 43 amu
    2. The edge length of a face-centred cubic cell is 508 pm. If the radius of the cation is 110pm, the radius of the anion is
    a) 144 pm
    b) 288 pm
    c) 618 pm
    d) 398 pm
  • 2. Solutions - Quiz

    1. The solutions in which the blood cells retain their normal shape, with regard to the blood, are
    a) Isotonic
    b) Hypertonic
    c) Hypotonic
    d) None of these
    2. A solution of acetone in ethanol
    a) shows a negative deviation from Raoults law
    b) shows a positive deviation from Raoults law
    c) behaves like a near ideal solution
    d) obeys Raoults law
  • 3. Electrochemistry - Quiz

    1. Al2O3 is reduced by electrolysiss at low potentials and high currents. If 4.0 × 104 A of current is passed through molten Al2O3 for 6 h, what mass of aluminium is produced? (Assume 100% current efficiency, at mass of Al = 27 g mol-1 )
    a) 9.0 × 103 g
    b) 8.1 × 104 g
    c) 2.4 × 105 g
    d) 1.3 × 104 g
    2. The resistance of 1N solution of acetic acid is 250 ohm, when measured in a cell constant 1.15 cm-1. The equivalent conductance (in ohm-1 cm2 eq-1) of 1N acetic acid is
    a) 4.6
    b) 9.2
    c) 18.4
    d) 0.023
  • 4. Chemical Kinetics - Quiz

    1. The activation energy for a simple chemical reaction A → B is Ea in forward direction. The activation energy for the reverse reaction
    a) can be less than or more than Ea
    b) is always double of Ea
    c) is negative of Ea
    d) is always less than Ea
    2. Burning of coal is represented as C(s) + O2(g) → CO2(g)
    The rate of this reaction is increased by
    a) Decrease in the concentration of oxygen
    b) Powdering the lumps of coal
    c) Decreasing the temperature of coal
    d) Providing inert atmosphere
  • 5. Surface Chemistry - Quiz

    1. Adsorption is the phenomenon in which substance
    a) Accumulates on the surface of the other substance
    b) Goes into the body of the other substance
    c) Remains close to the other substance
    d) None is correct
    2. Which of the following statements is incorrect regarding physisorption?
    a) It occurs because of van der waals forces
    b) Liquefiable gases are adsorbed more easily
    c) Under high pressure it results surface
    d) Enthalpy of adsorption (ΔHadsorption) is low and positive
  • 6. General Principles and Processes of Isolation of Elements - Quiz

    1. Which is not an ore of iron?
    a) Magnetite
    b) Haematite
    c) Limonite
    d) Cuprite
    2. In aluminothermite process, aluminium is used as
    a) Oxidising agent
    b) Flux
    c) Reducing agent
    d) Solder
  • 7. The p-Block Elements - Quiz

  • 8. The d-and f-Block Elements - Quiz

    1. When H2S gas is passed through an orange red solution (X), the solution turns milky. When an alkali is added to this orange red solution it turns yellow and on acidifying this yellow solution again turns orange red. X is
    a) K2CrO4
    b) KMnO4
    c) Na2Cr2O7
    d) K2Cr2O7
    2. Cerium shows oxidation stat of +4 because
    a) It resembles alkali metals
    b) It has very low IE
    c) It has tendency to attain noble gas configuration
    d) It has tendency to attain f0 configuration
  • 9. Coordination Compounds - Quiz

    1. Which of the following will give a pair of enantiomorphs?
    a) [Cr(NH3)6][Co(CN)6]
    b) [Co(en)2Cl2]Cl
    c) [Pt(NH3)4][PtCl6
    d) [Co(NH3)4Cl2]NO2
    2. An aqueous solution of titanium bromide shows zero magnetic moment . Assuming the complex as octahedral in aqueous solution, the formula of the complex is
    a) [TiVr6]3-
    b) [Ti(H2O)6]Br4
    c) [TiBr6]2-
    d) [Ti(H2O)4Br2]
  • 10. Haloalkanes and Haloarenes - Quiz

  • 11. Alcohols, Phenols and Ethers - Quiz

    1. Which of the following is the best synthesis of the ether (A) shown below:

    a)
    b)
    c)
    d)
    2. Which of the following reactions is possible?
    a) (CH3)3 C-CH2-ONa+(CH3)3C-CH2Br→(CH3)3C-CH2-O-CH2-C(CH3)3
    b) CH3CH=CH-ONa+CH3CH=CH-Br→CH3CH=CH-O-CH=CH-CH3
    c) (CH3)3C-ONa+CH3CH2Br→(CH3)3C-O-CH2-CH3
    d) CH3CH2ONa+PhBr →CH3CH2O-Ph
  • 12. Aldehydes, Ketones and Carboxylic Acids - Quiz

    1. Reduction by LiAlH4 of hydrolysed product of an ester gives
    a) two acids
    b) two aldehydes
    c) one molecules of alcohol and another of carboxylic acid
    d) two alcohols
    2. Acetalidehyde reacts with
    a) electrophiles only
    b) nucleophiles only
    c) free radicals only
    d) both electrophiles and nucleophiles
  • 13. Amines - Quiz

  • 14. Biomolecules - Quiz

    1. Which of the following is a female sex hormone?
    a) Adrenaline
    b) Estrone
    c) Cortisone
    d) Testosterone
    2. Carbohydrates are stored in human body as the polysaccharide:
    a) Starch
    b) Glucose
    c) Glycogen
    d) Galactose
  • 15. Polymers - Quiz

  • 16. Chemistry in Everyday Life - Quiz

  • 17. Nuclear Chemistry - Quiz

    1. Total binding energy of α-particles is
    a) 28.3 MeV
    b) 2.83 MeV
    c) 20.5 MeV
    d) 0.283 MeV
    2. Which of the following has the maximum penetrating power?
    a) α-particle
    b) Proton
    c) γ-particle
    d) Positron
  • 18. p-Block Group 16 Elements (Oxygen Family) - Quiz

    1. H2SO3 and H2SO4 involve hybridisation of the type
    a) Both sp3
    b) Both sp3 d
    c) sp3 , sp3 d
    d) Both dsp2
    2. Which gas is used to improve the atmosphere of the crowded places?
    a) H2
    b) O2
    c) O3
    d) N2O
  • 19. p-Block Group 17 Element (Halogen Family) - Quiz

    1. KClO3 on reaction with SO2 gives (A) and on reaction with conc. H2SO4 gives (B). (A) and (B) are
    a) KCl, HClO4
    b) Cl2, ClO2
    c) KCl, HClO3
    d) Cl2, HClO4
    2. When chlorine water is added to an aqueous solution of sodium iodide in the presence of chloroform, a violet colouration is obtained. On adding more of chlorine water and vigorous shaking, the violet colour disappears. This shows the conversion of ……. into ......
    a) I2, HIO3
    b) I2, HI
    c) HI, HiO3
    d) I2, HOI
  • 20. p-Block Group 18 Element (Inert Gases) - Quiz

    1. Radon is a noble gas. Its radioactivity is used in the treatment of
    a) typhoid
    b) cancer
    c) cough an cold
    d) thyroid
    2. Which of the following does not react with fluorine?
    a) Kr
    b) Ar
    c) Xe
    d) All of these
  • 21. Grignard Reagents & Organometallic Compounds - Quiz

    1. Methyl oxirane on reaction with CH3MgBr, followed by hydrolysis, gives alcohol. By which of the following mechanisms does the reaction proceed?
    a) SN-1
    b) SN2
    c) SNi
    d) SE
    2. Which of the following 30 alcohols does propyl ester give during reaction with EtMgBr?
    a)
    b)
    c)
    d)
  • 22. Oxydation 7 Reduction of Organic Compounds - Quiz

    1. Acid-catalysed hydration, oxymerculation - demercuration, and hydroboration oxidation reaction will give the same product with:
    a) But-2-ene
    b) But-1-ene
    c)
    d)
    2.
    The reagent (A) is:
    a) LAH
    b) HI + P
    c) NaAlH4
    d) B2H6/H2O
  • 23. Aliphetic & Aromatic Aldehyde and Ketones - Quiz

    1. Which of the following aromatic compounds is least reactive towards electrophile substitutions?
    a)
    b)
    c)
    d)
    2. Neopentyl chloride on reaction with ethanolic KOH is likely to:
    a) Neopentyl alcohol
    b) Pentylene
    c) 2-Methyl-2-butene
    d) Undergo no reaction
  • 24. Carboxlic Acid & Its Derivatives - Quiz

    1. Which of the following is expected to be most highly ionised in water?
    a) CH2ClCH2CH2COOH
    b) CH3CHClCH2COOH
    c) CH3CH2CCl2COOH
    d) CH3CH2CHClCOOH
    2. Which of the following is basic?
    a) CH3CH2OH
    b) H-O-O-H
    c) HO-CH2-CH2-OH
    d) HO-CH2-CH2-OH
  • 25. Organic Compounds with Functional Group - Quiz

    1. Which of the following reagents on treatment with benzenamine in basic medium produces phenyl isocyanide?
    a) CC14
    b) Trichloromethane
    c) Methylene dichloride
    d) Hexachloroethane
    2. The compound 1-(N-ethyl-N-methyl)-propanamine forms non-superimposable mirror images. But this compound does not show optical activity because of the:
    a) Absence of a chiral N atom
    b) Presence of chiral N atom
    c) Presence of lone pair on N atom
    d) Rapid flipping of one form into the other.
  • 26. Synthetic and Natural Polymer - Quiz

    1. Which one is a synthetic polymer?
    a) Starch
    b) Silk
    c) Protein
    d) Neopprene
    2. Acrilan is a hard material and has high melting point. Which of the following represents its structure?
    a)
    b)
    c)
    d)
  • 27. p-Block Group 15 Elements (Nitrogen Family - Quiz

    1. Least basic trihalides of nitrogen is
    a) NF3
    b) NCl3
    c) NBr3
    d) NI3
    2. Catalytic oxidation of NH3 (passing a mixture of NH3 and air over heated Pt gauge) gives
    a) NO
    b) N2O
    c) N2O3
    d) N2O5