Class/Course - Class XII

Subject - Chemistry

Total Number of Question/s - 4730


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  • 1. The Solid State - Quiz

    1. In NaCl, the chloride ions occupy the space in a fashion of
    a) fcc
    b) bcc
    c) Both
    d) None
    2. What is the density of Na2O having antifluorite-type crystal structure, if the edge length of cube in 100 pm and what is effect on density by 0.05% Frenkel defect?
    a) 823.5 g cm-3 , density decreases
    b) 414.16 cm-3, density decreases
    c) 823.5 g cm-3, density remains same
    d) 414.16 g cm-3, density remains same
  • 2. Solutions - Quiz

    1. An ideal solution is formed when its components
    a) have no volume change on mixing
    b) have no enthalpy change on mixing
    c) have both the above characteristics
    d) have high solubility
    2. The molal freezing point constant of water is 1.86 K m-1. If 342g of cane sugar (C12H22O11) is dissolved in 1000g of water, the solution will freeze at
    a) -1.860C
    b) 1.860C
    c) -3.920C
    d) 2.420C
  • 3. Electrochemistry - Quiz

    1. A current strength of 1.0 A is passed for 96.5 s strength 100mL of a solution of 0.05 M KCl. The concentration of the final solution with respect to ions is
    a) 0.005 M
    b) 0.05 M
    c) 0.01 M
    d) 0.001 M
    2. Select the correct statement
    a) Faraday reperesents 96500 coulombs per second
    b) Couloumb represents one ampere for 1/2 second
    c) Couloumb represents 1/2 ampere for 1 second
    d) Coulomb represents charge of one mole electron.
  • 4. Chemical Kinetics - Quiz

    1. For a first - order reaction, the half-life period is independent of
    a) initial concentration
    b) cube root of initial concentration
    c) first power of initial concentration
    d) square root of final concentration
    2. The second order rate constant in usually expressed as
    a) Mol L s-1
    b) Mol-1 s-1
    c) Mol L-1 s-1
    d) Mol-1 L s-1
  • 5. Surface Chemistry - Quiz

    1. The process of removing dissolved impurities from a colloidal system by means of diffusion through suitable membrane under the influence of an electric field is called
    a) Electro-osmosis
    b) Electrodialysis
    c) Electrophoresis
    d) Peptization
    2. Softening of hard water is done using sodium aluminium silicate (zeolite). This causes
    a) Adsorption of Ca2+ and Mg2+ ions of hard water replacing Na⊕ ions.
    b) Adsorption of Ca2+ and Mg2+ ions of hard water replacing Al3+ ions
    c) Both (a) and (b) are true
    d) None is true
  • 6. General Principles and Processes of Isolation of Elements - Quiz

    1. CO on passing over heated nickel gives
    a) Ni(CO)4
    b) NiCO3
    c) CO + H2
    d) CO2 + H2
    2. On heating limestone, carbon dioxide is given off. This operation in metallurgy is known as
    a) Calcination
    b) Roasting
    c) Smelting
    d) Ore-dressing
  • 7. The p-Block Elements - Quiz

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

    1. Which of the following ions will finally give a black precipitate with Ag⊕ ion?
    a) SO32-
    b) Br⊝
    c) CrO42-
    d) 2O32-
    2. Which of the following oxides of Cr is amphoteric
    a) CrO2
    b) Cr2O3
    c) CrO5
    d) CrO3
  • 9. Coordination Compounds - Quiz

    1. 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]
    2. Which of the following octahedral complex does not show geometrical isomerism (A and B are monodentate ligands?
    a) [MA3B3]
    b) [MA4B2]
    c) [MA5B]
    d) [MA2B4]
  • 10. Haloalkanes and Haloarenes - Quiz

  • 11. Alcohols, Phenols and Ethers - Quiz

    1. Give the decreasing order of the reaction rates of the following benzyl with HBr.

    a) I > II > III > IV
    b) IV > III > II > I
    c) II > I > III > IV
    d) IV > III > I > II
    2. CH3OH + C2H5OH $\overset{H^{\oplus }}{\rightarrow}$Products
    a) The product is CH3-O-C2H5
    b) The product is CH3-O-CH3
    c) The products is C2H5 -O-C2H5.
    d) All
  • 12. Aldehydes, Ketones and Carboxylic Acids - Quiz

    1. Formalin is an aqueous solution of
    a) fluorescein
    b) formic acid
    c) formaldehyde
    d) furfuraldehyde
    2. The reagent(s) which can be used to distinguish acetophenone from benzophenone is (are)
    a) 2,4-dinitrophenyl hydrazine
    b) aqueous solution of NaHSO3
    c) Benedict reagent
    d) I2 and Na2CO3
  • 13. Amines - Quiz

  • 14. Biomolecules - Quiz

    1. Lactose is made up of:
    a) Galactose unit and glucose unit
    b) Glucose unit and fructose unit
    c) Both glucose units
    d) Glucose are arbinose unit
    2. The chemical extracted from the plant Rauwolfia serpentina is:
    a) Aspirin
    b) Quinine
    c) Bithional
    d) Reserpine
  • 15. Polymers - Quiz

  • 16. Chemistry in Everyday Life - Quiz

  • 17. Nuclear Chemistry - Quiz

    1. The reaction
    1D2 + 1T3 → 1He2 + 0n1
    is an example of
    a) Nuclear fission
    b) Nuclear fusion
    c) Artificial radioactivity
    d) Radioactive disintegration
    2. Which of the following nuclear changes is incorrect?
    a) $_{20}Ca^{41} + _{0}n^{1} \rightarrow _{19}K^{40} + _{1}H^{1}$
    b) $_{12}Mg^{24} + \alpha \rightarrow _{14}Si^{27} + _{0}n^{1}$
    c) $_{48}Cd^{113} + _{0}n^{1} \rightarrow _{48}Cd^{112} + _{1}e^{0}$
    d) $_{20}Co^{43} + \alpha \rightarrow _{21}Si^{46} + _{1}H^{1}$
  • 18. p-Block Group 16 Elements (Oxygen Family) - Quiz

    1. All the elements of oxygen family are
    a) Non-metals
    b) Metalloids
    c) Radioactive
    d) Polymorphic
    2. Sulphuric acid has great affinity for water because it
    a) Decomposes water
    b) Forms hydrate with water
    c) Hydrolyse the acid
    d) Decomposes the acid
  • 19. p-Block Group 17 Element (Halogen Family) - Quiz

    1. Fluorine on reaction with KIO3(aq.) gives (A) and on reaction with KHSO4 gives (B). (A) and (B) are
    a) KIO4, K2S2O3
    b) KI, F2O
    c) HF, K2S2O8
    d) I2, K2S2O8
    2. Which one of the following pairs of reactants does not form oxygen when they react with each other?
    a) F2, NaOH solution (hot, conc.)
    b) F2, H2O
    c) Cl2, NaOH solution (cold, dilute)
    d) CaOCl2, H2SO4 (dilute, small amount)
  • 20. p-Block Group 18 Element (Inert Gases) - Quiz

    1. The solubility of noble gases in water shows the order:
    a) He > Ar > Kr > Ne > Xe
    b) He > Ne > Ar > Kr > Xe
    c) Xe > Kr > Ar > Ne > He
    d) None of the above
    2. Helium is used in gas balloons instead of hydrogen because
    a) it is higher than H2
    b) it is non-combustible
    c) it is more abundant than H2
    d) its linkage can be detected easily
  • 21. Grignard Reagents & Organometallic Compounds - Quiz

    1. (A) is :
    a)
    b)
    c)
    d)
    2. When methyl orthoformate is treated with followed by hydrolysis, the product is:
    a)
    b)
    c)
    d)
  • 22. Oxydation 7 Reduction of Organic Compounds - Quiz

    1.
    The product (A) formed can:
    a) give iodoform test
    b) further react with MeMgBr/H3O⊕ to give t-butyl alcohol
    c) be obtained by the ozonolysis of 2,3-dimethyl1-2-butene
    d) all correct
    2. The catalyst and solvent used in MPV (Meerwein-Ponndorf-Verley) reaction are:
    a)
    b)
    c)
    d)
  • 23. Aliphetic & Aromatic Aldehyde and Ketones - Quiz

    1. The decreasing nucleophilic order of the following compounds is:

    a) (i) > (ii) > (iii) > (iv)
    b) (iv) > (iii) > (ii) > (i)
    c) (iii) > (ii) > (i) > (iv)
    d) (iii) > (ii) > (iv) > (i)
    2. $Ethanol \xrightarrow[]{P_{4}/I_{2}}(X)\xrightarrow[(ii)HBr]{(i)KOH(alc.)}(Y)$
    In this sequence of reactions, (Y) is:
    a) Ethene
    b) Bromoethane
    c) Ethanol
    d) None
  • 24. Carboxlic Acid & Its Derivatives - Quiz

    1. Westrosol $\xrightarrow[]{90% H_{2}SO_{2}}(X) \xrightarrow[]{NH_{3}}(Y)$.Here, Y is:
    a) Acrylic acid
    b) Glycine
    c) Anthracene
    d) Pyruvic acid
    2. When propionic acid is treated with aqueous sodium bicarbonate , CO2 is liberated. The C of CO2 come from:
    a) Methyl group
    b) Carboxylic acid group
    c) Methylene group
    d) Bicarbonate group
  • 25. Organic Compounds with Functional Group - Quiz

    1. The electrolytic reduction of nitrobenzene in strongly acidic medium produces:
    a) Phenol
    b) p-Aminophenol
    c) Hydroazobenzene
    d) Azobenzene
    2. Which of the following nitro compounds will show tautomerism?
    a) C6H5NO2
    b) (CH3)3CNO2
    c) CH3CH2NO2
    d) None of the above
  • 26. Synthetic and Natural Polymer - Quiz

    1. Glyptal is the polymer of:
    a) Ethyle glycol
    b) Ethylene glycol and phthalic acid
    c) Ethylene glycol and adipic acid
    d) Caprolactum
    2. Isotactic polypropylene polymer is one in which :
    a) All methyl groups are on one side of the extended chain. It is a highly crystalline, has high melting point, and forms strong fibres.
    b) The methyl groups present alternate regularly from one side to the other.
    c) The methyl groups are distributed at random. It is a soft, elastic, and rubbery material.
    d) None of these
  • 27. p-Block Group 15 Elements (Nitrogen Family - Quiz

    1. Which one of the following is used for drying of ammonia?
    a) conc. H2SO4
    b) CaO
    c) P2O5
    d) Anhydrous CaCl2
    2. NH3 has pyramidal structure with HNH bond angle of 1070 It forms complexes with cation which of the following does not form complex with NH3?
    a) Ag⊕
    b) Cu2+
    c) Cd2+
    d) Pb2+