Class/Course - Class XII

Subject - Chemistry

Total Number of Question/s - 4730


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  • 1. The Solid State - Quiz

    1. How many unit cells are present in a cubic-shaped ideal crystal of NaCl of mass 1.0 g?
    a) 1.28 x 1021
    b) 1.71 x 1021
    c) 2.57 x 1021
    d) 5.14 x 1021

    2. Every atom or ion that forms an fcc unit cell is surrounded by
    a) Six OVs and eight TVs
    b) Eight OVs and six TVs
    c) Six OVs and six TVs
    d) Eight OVs and four TVs

  • 2. Solutions - Quiz

    1. On mixing 10mL of carbon tetrachloride with 10mL of benzene, the total volume of the solution is
    a) > 20mL
    b) < 20 mL
    c) =20 mL
    d) Cannot be predicted

    2. The freezing point of 1% aqueous solution of calcium nitrate will be
    a) 00C
    b) above 00C
    c) 10C
    d) Below 00C

  • 3. Electrochemistry - Quiz

    1. The value of molar conductivity of HCl is greater than that of NaCl at a particular temperature because
    a) Molecular mass of HCl is less than of NaCl
    b) Velocity of H ions is more than that of Na ions.
    c) HCl is stronglyy acidic
    d) Ionizes of HCl is larger than that of NaCl

    2. Chromium plating can involve the electrolysis of an electrolyte of an acidified mixture of chromic acid and chromium sulphate . If during electrolysis the article being plated increases in mass by 2.6 and 0.6 dm3 of oxygen are evolved at an inert anode, the oxidation state of chromium ions being discharged must be : (assuming atomic weight of Cr = 52 and 1 mol of gas at room temperature and pressure occupies a volume of 24 dm3)
    a) -1
    b) Zero
    c) +1
    d) +2

  • 4. Chemical Kinetics - Quiz

    1. Consider a gaseous reaction, the rat of which is given by kA]B]. The volume of the reaction vessel containing these gases is suddenly reduced to 1/4th of the initial volume. The rate of the reaction as compared with original rate is
    a) 1/16 times
    b) 16 times
    c) 1/8 times
    d) 8 times

    2. A second order reaction requires 70 min to change the concentration of reactants from 0.08M to 0.01M. How much time will it require to becomes 0.04M?
    a) 10 min
    b) 20 min
    c) 30 min
    d) 40 min

  • 5. Surface Chemistry - Quiz

    1. Of which of the following colloidal system , fog is an example?
    a) Liquid dispersed in gas
    b) Gas dispersed in gas
    c) Solid dispersed in gas
    d) Solid dispersed in liquid

    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. Iron Obtained from blast furnace is known as
    a) Steel
    b) Cast iron
    c) Wrought iron
    d) Pig iron

    2. Which of the following processes involve the roasting process?
    a) ZnCO3 $\rightarrow$ ZnO + CO2
    b) Fe2O3 + 3C $\rightarrow$ 2Fe + 3CO
    c) 2PbS + 3O2 $\rightarrow$ 2PbO + 2SO2
    d) Al2O3.2H2O $\rightarrow$ Al2O3 + 2H2O

  • 7. The p-Block Elements - Quiz

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

    1. From a solution of CuSO4, the metal used to recover copper is
    a) Na
    b) Ag
    c) Hg
    d) Fe

    2. The first ionisation energies of the elements of the first transition series (Ti → Cu)
    a) Increases as the atomic number increases
    b) Decreases as the atomic number increases
    c) Do not show any change as th addition of electrons takes place in the inner (n-i) d-orbitals
    d) Increases from Ti to Mn and then decreases from Mn to Cu

  • 9. Coordination Compounds - Quiz

    1. The number of ions produced by the complex
    a) 2
    b) 3
    c) 4
    d) 6

    2. In isolated condition C-C bond length of C2H4 is x, than the bond length ofn C-C bond of C2H4 in Zeises salt is
    a) Greater than x
    b) Less than x
    c) Equal to x
    d) None of these

  • 10. Haloalkanes and Haloarenes - Quiz

  • 11. Alcohols, Phenols and Ethers - Quiz

    1. Consider the following reaction and identify (B):

    a)
    b)
    c)
    d)

    2.
    The compound (C ) is:
    a)
    b)
    c)
    d)

  • 12. Aldehydes, Ketones and Carboxylic Acids - Quiz

    1. During reduction of aldehydes with hydrazine and potassium hyroxide, the first is the formation of
    a) R-CH=N-NH2
    b)
    c)
    d) R-CH=NH

    2. Benzaldehyde reacts with ethanolic KCN to give
    a) C6H5CHOHCN
    b) C6H5CHOHCOC6H5
    c) C6H5CHOHCOOH
    d) C6H5CHOHCHOHC6H5

  • 13. Amines - Quiz

  • 14. Biomolecules - Quiz

    1. Biotin is an organic compound present in yeast. Its deficiency in diet causes dermatitis and paralysis. It is also known as:
    a) Vitamin H
    b) Vitamin B1
    c) Vitamin B12
    d) Vitamin D

    2. Enzymes belong to which class of compounds ?
    a) Polysaccharides
    b) Polypeptides
    c) Polynitro hetcrocyclic compounds
    d) Hydrocarbons

  • 15. Polymers - Quiz

  • 16. Chemistry in Everyday Life - Quiz

  • 17. Nuclear Chemistry - Quiz

    1. Which of the following nuclei is unstable?
    a) $_{5}B^{10}$
    b) $_{4}Be^{10}$
    c) $_{7}N^{14}$
    d) 8O16

    2. After three half-lives, the percentage of fraction of amount left is
    a) 6.35
    b) 12.5
    c) 50
    d) 75

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

    1. The function of Fe(OH)3 in the contact process is
    a) To detect colloidal impurity
    b) To remove moisture
    c) To remove dust particles
    d) To remove arsenic impurity

    2. Which one of the following statements is wrong?
    a) SO2 dissolves in water and forms sulphurous acid
    b) SO2 acts as a bleaching agent
    c) SO2 has pungent odour
    d) SO2 acts only as oxidising agent

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

    1. The following acids have been arranged in the order of decreasing acid strength. Identify the correct order.
    ClOH(I) BrOH(II) IOH(III)
    a) I > II > III
    b) II > I > III
    c) III > II > I
    d) I > III > II

    2. Bond strength of halogen acids are
    a) HF > HCl > HBr > HI
    b) HCl > HF > HBr > HI
    c) HCl > HBr > HF > HI
    d) HI > HBr > HCl < HF

  • 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. Argon was discovered by
    a) Cavendish
    b) Lavoisier
    c) Rayleigh
    d) Thomson

  • 21. Grignard Reagents & Organometallic Compounds - Quiz

    1. Reactivity of with the following G.R. in the decreasing order is:
    (i). MeMgBr (ii) EtMgBr
    (iii) Me2Ch-MgBr (iv)Me3C-MgBr
    a) (i) > (ii) > (iii) > (iv)
    b) (iv) > (iii) > (ii) > (i)
    c) (i) > (ii) > (iv) > (iii)
    d) (iv) > (ii) > (iii) > (i)

    2. (A) is:
    a)
    b)
    c)
    d)

  • 22. Oxydation 7 Reduction of Organic Compounds - Quiz

    1. Which of the following compounds will not give haloform reaction?
    a) α-Phenyl ethanol
    b) Acetopenone
    c) Ethyl bromide
    d) (MeCO)2O

    2. $Et - N^{\oplus} \equiv C^{\circleddash}\xrightarrow[or \ HgO \ or \ O_{3}]{Cl_{2} + DMSO}$
    The compound (A) is:
    a) Ethyl methyl amine
    b) Ethyl nitrile
    c) Ethyl isocyanate
    d) Ethyl cyanate

  • 23. Aliphetic & Aromatic Aldehyde and Ketones - Quiz

    1. The decreasing order of aromaticity of the following is
    I. Benzene II. Naphthalaene III. Anthracene
    a) (I) > (II) > (III)
    b) (III) > (II) > (I)
    c) (II) > (I) > (III)
    d) (II) > (III) > (I)

    2. The structure of the major product formed in the following reaction is:

    a)
    b)
    c)
    d)

  • 24. Carboxlic Acid & Its Derivatives - Quiz

    1. The boiling points of ethyl acetate and CH3OH, respectively, are 770C and 650 C. Which of the following reactions can be shifted to the right by the distillation of the reaction mixture at about 660C.
    I.MeCOOEt + MeOH →
    I.MeCOOMe + EtOH →
    III.MeCOOMe + PhOH →
    IV.MeCOOPh + MeOH →
    a) (I), (II)
    b) (II), (III)
    c) (I), (III)
    d) (II), (IV)

    2. When glycolic acid is subjected to reduction with HI, the product formed is:
    a) Acetic acid
    b) Formic acid
    c) Iodoacetic acid
    d) None of the above

  • 25. Organic Compounds with Functional Group - Quiz

    1. Which of the following represents the poisonous gas which caused the tragedy in Bhopal in 1984?
    a) CH3C=N=S
    b) CH3-N=C=O
    c) CH3-N=C=S
    d) CH3-O-N=C

    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. Which of the following is a fully flourinated polymer?
    a) Thiokol
    b) Teflon
    c) Neoprene
    d) PVC

    2. The abbreviation PDI refers to:
    a) Name of the polymer
    b) Polydispersity index of the polymer
    c) Application of the polymer
    d) Polydiagonal index

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

    1. Boiling / melting point of the following hydrides follow in order
    a) SbH3 > AsH3 > PH3 < NH3
    b) SbH3 > AsH3 > PH3 > NH3
    c) SbH3 > AsH3 < PH3 < NH3
    d) SbH3 < AsH3 < PH3 < NH3

    2. Calcium phosphide is used in smoke screen because it
    a) Burns to form soot
    b) Gives phosphine which catches fire to give needed smoke
    c) Immediately catches fire in air
    d) Is a gas which brings tears in the eyes