Class/Course - Class XII

Subject - Chemistry

Total Number of Question/s - 4730

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  • 1. The Solid State - Quiz

    1. The ratio of the volume of a tetragonal lattice unit cell to that of a hexagonal lattice unit cell is (both having same respective lenghts)
    a) $\frac{\sqrt{3}}{2}abc$
    b) $\frac{2}{3\sqrt{3}}$
    c) $\frac{2}{\sqrt{3}}\frac{a^{2}b}{b}$
    d) 1

    2. The γ-form of iron has fcc structure (edge length 386 pm) and β-form has bcc structure (edge length 290 pm). The ratio of density in γ-form and β-form is
    a) 0.9788
    b) 1.02
    c) 1.57
    d) 0.6344

  • 2. Solutions - Quiz

    1. If a thin slice of sugar beet is placed in concentrated solution of NaCl, then
    a) Sugar beet will lose water from its cells
    b) Sugar beet will absorb water from solution
    c) Sugar beet will neither absorb nor lose water
    d) Sugar beet will dissolve in solutions

    2. Concentrated aqueous sulphuric acid is 98% H2SO4 by mass has a density of 1.80 g mol-1. Volume of acid required to make one litre of 0.1 M H2SO4 solution is
    a) 11.10 mL
    b) 16.65mL
    c) 22.20 mL
    d) 5.55mL

  • 3. Electrochemistry - Quiz

    1. In electrolysis of very dilute NaOH using platinum electrodes
    a) H2 is evolved at cathode and O2 at anode
    b) NH3 is produced at anode
    c) Cl2 is obtained at cathode
    d) O2 is produced at cathode and H2 at anode

    2. The solution of CuSO4 in which copper rod is immersed is diluted to 10 times. The reduction electrode potential
    a) Increases by 30 mV
    b) Decreases by 30mV
    c) Increases by 59 mV
    d) Decreases by 59 mV

  • 4. Chemical Kinetics - Quiz

    1. Which of the following reactions is not of the first order?
    a) Inversion of sucrose in the presence of acid
    b) Acid-catalyzed hydrolysis of ethyl acetate
    c) Hydrolysis of tertiary butyl halide using alkali
    d) Oxidation of $I^{\circleddash}$ ion by S2O82- ion

    2. The slope of the line for the graph of log k versus 1/T for the reaction N2O2 → 2NO2 + 1/2O2 is -5000. Calculate the energy of acitivation of the reaction (in kJ K-1 mol-1)
    a) 95.7
    b) 9.57
    c) 957
    d) None

  • 5. Surface Chemistry - Quiz

    1. If liquid is dispersed in solid medium, then this is called as:
    a) Sol
    b) Emulsion
    c) Liquid aerosol
    d) Gel

    2. 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

  • 6. General Principles and Processes of Isolation of Elements - Quiz

    1. Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic?
    a) CaCO3 $\rightarrow$ CaO + CO2
    b) 2C + O2 $\rightarrow$ 2CO
    c) C + O2 $\rightarrow$ CO2
    d) Fe2O3 + 3CO $\rightarrow$ 2Fe + 3CO2

    2. corundum is
    a) SrO2
    b) Al2O3
    c) CaCl2
    d) Cu2Cl2

  • 7. The p-Block Elements - Quiz

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

    1. Which is not amphoteric?
    a) Al3+
    b) Cr3+
    c) Fe3+
    d) Zn2+

    2. During titration , H2SO4 is preferably use over HCl and HNO3 to make the solution acidic because
    a) H2SO4 is a strong oxidising agent and it reacts with KMnO4 during titration
    b) Some KMnO4 is consumed during the reaction with H2SO4
    c) H2SO4 does not react with MnO4 or the reducing agent used
    d) H2SO4 can turn colourless KMnO4 to pink at the emd point

  • 9. Coordination Compounds - Quiz

    1. Consider the following complex:
    the coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons of the metal are respectively:
    a) 6,3,6,0
    b) 7,1,6,4
    c) 7,2,7,1
    d) 6,2,7,3

    2. A group of atoms can function as a ligand only when
    a) It is a small molecule
    b) It is capable of acting as donor of electron pair
    c) It is a negatively charged ion
    d) It is a positively charged ion

  • 10. Haloalkanes and Haloarenes - Quiz

  • 11. Alcohols, Phenols and Ethers - Quiz

    1. The best method to prepare cyclohexene from cyclohexanol is by using:
    a) Conc.HCl + ZnCl2
    b) Conc.H3PO4
    c) HBr
    d) Conc. HCl

    2. Which among the following compounds will not give effervescence with sodium bicarbonate?
    a) C6H5CO2H
    b) C6H5SO3H
    c) C6H5OH
    d) Picric acid

  • 12. Aldehydes, Ketones and Carboxylic Acids - Quiz

    1. The relative reactivities of acyl compounds towards nucleophilic substitution  are in the order of
    a) acyl chloride > acid anhydride > ester > amide
    b) ester > acyl chloride > amide > acid anyhydride
    c) acid > anyhydride > amide > ester > acyl chloride
    d) acyl chloride > ester > acid anyhydride > amide

    2. (CH3)2C = CHCOCH3 can be oxidised to (CH3)2C=CHCOOH by
    a) chromic acid
    b) NaOI
    c) Cu at 3000C
    d) KMnO4

  • 13. Amines - Quiz

  • 14. Biomolecules - Quiz

    1. The term anomer of glucose refers to:
    a) Isomers of glucose that differ in configuration at carbons one and four (C-1 and C-4).
    b) A mixture of D-glucose and L-glucose.
    c) Enantiomers of glucose.
    d) Isomers of glucose that differ in configuration at carbon one (C-1).

    2. Thymine is :
    a) 5-Methyluracil
    b) 4-Methyluracil
    c) 3-Methyluracil
    d) 1-Methyluracil

  • 15. Polymers - Quiz

  • 16. Chemistry in Everyday Life - Quiz

  • 17. Nuclear Chemistry - Quiz

    1. A substance is kept for 2 hours and three-fourth of that substance disintegrates during this period. The half life of the substance is
    a) 2 hr
    b) 1 hr
    c) 30 min
    d) 4 hr

    2. C-14 has a life of 5760 years. 100mg of sample containing C-14 is reduced to 25mg in
    a) 11520 years
    b) 2880 years
    c) 1440 years
    d) 17280 years

  • 18. p-Block Group 16 Elements (Oxygen Family) - Quiz

    1. The product A in the following reaction:
    2KMnO4 $\rightarrow$ A + KMnO2 + O2 is
    a) K2Mn2O7
    b) K2MnO4
    c) K2O
    d) K2O2

    2. Which one has the highest and lowest boiling point?
    a) H2O, H2S
    b) H2O, H2Se
    c) H2S, H2O
    d) H2S, H2Se

  • 19. p-Block Group 17 Element (Halogen Family) - Quiz

    1. Which has the highet degree of hydrogen bonding?
    a) HCl
    b) H2O
    c) HF
    d) HBr

    2. Which one of the following acts as an antichlor?
    a) MnO2
    b) Na2S2O3
    c) K2Cr2O7
    d) Na2SO4

  • 20. p-Block Group 18 Element (Inert Gases) - Quiz

    1. Radon was discovered by
    a) Dorn
    b) Ramsay
    c) Rayleigh
    d) none of these

    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. Reactivity of PrMgBr with the following in the decreasing order is:
    (i) Alcohol (ii) Aldehyde
    (iii) Ketone (iv) Ester
    a) (iv) > (iii) > (ii) > (i)
    b) (i) > (ii) > (iii) > (iv)
    c) (ii) > (iii) > (i) > (iv)
    d) (iv) > (i) > (iii) > (ii)

    2. Ethanoic propanoic anhydride on reaction with excess of MeMgBr gives the major product

  • 22. Oxydation 7 Reduction of Organic Compounds - Quiz

    The products are:
    c) Both (a) and (b)
    d) None

    The products (A), (B) and (C) are:

  • 23. Aliphetic & Aromatic Aldehyde and Ketones - Quiz

    1. Which is most reactive towards Br2 in the presence of FeBr3 ?
    a) Anisole
    b) Benzene
    c) Bromobenzene
    d) Nitrobenzene

    2. Which of the following halides is capable of exhibiting enantiomerism?
    a) Ethyl chloride
    b) Isopropyl bromide
    c) sec-Butyl iodide
    d) tert-Butyl chloride

  • 24. Carboxlic Acid & Its Derivatives - Quiz

    1. One mole of an organic compound is found to require only 0.5 mol of oxygen to produce an acid. Which class of compounds does the starting material belong to?
    a) Alcohol
    b) Aldehyde
    c) Ether
    d) Ketone

    2. The compound which reacts with Fehling solution is:
    a) C6H5COOH
    b) HCOOH
    c) C6H5CHO
    d) CH2ClCH3

  • 25. Organic Compounds with Functional Group - Quiz

    1. When propane is subjected to the treatment with fuming nitric acid at 673 K, which of the following will not be formed?
    a) 1-Nitropropane
    b) 2-Nitropropane
    c) Nitromethane
    d) Nitrohexane

    2. Nitromethane is subjected to treatment with chlorine in the presence of sodium hydroxide, the main product is:
    a) Monochloronitromethane
    b) Trichloromethane
    c) Chloropicrin
    d) None of the above

  • 26. Synthetic and Natural Polymer - Quiz

    1. Free radical polymerisation requires a free radical initiator. The most commonly used free radical initiator is:
    a) Ph-CO-O-O-COPh, benzoylperoxide
    b) (CH3)3C-O-O-C(CH3)3, tert-butyl peroxide
    d) CH2N2, diazomethane

    2. The weakest interparticle forces are present in:
    a) Thermosetting polymers
    b) Thermoplastic polymers
    c) Fibres
    d) Elastomers

  • 27. p-Block Group 15 Elements (Nitrogen Family - Quiz

    1. When orthophosphoric acid is heated at 2400C, the main product formed is
    a) H3PO3
    b) H3PO2
    c) HPO3
    d) H4P2O7

    2. When phosphine is bubbled through a solution of nitrate__________is precipitated.
    a) Silver
    b) Silver phosphide
    c) Silver oxide
    d) None of these