Total Number of Question/s - 4730

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  • 1. The Solid State - Quiz


    SAMPLE QUESTIONS


    1. A molecule A2B (Mw = 166.4) occupies triclinic lattice with a = 5Å , b = 8Å and c = 4Å. If the density of AB2 is 5.2 g cm-3, the number of molecules present in one unit cell is
    a) 2
    b) 3
    c) 4
    d) 5

    2. Due to Frenkel defect, the density of the ionic solids
    a) Increases
    b) Decreases
    c) Does not change
    d) Changes

  • 2. Solutions - Quiz


    SAMPLE QUESTIONS


    1. A solution containing components A and B follows Raoults law, when 
    a) A-B attraction force is greater than A-A and B-B
    b) A-B attraction force is less than A-A and B-B
    c) A-B attraction force remains same as A-A and B-B
    d) volume of solution is different from sum of volumes of solute and solvent

    2. The osmotic pressure of a dilute solution is directly proportional to the
    a) Diffusion rate of the solute
    b) Ionic concentration
    c) Boiling point
    d) Flow of solvent from a concentrated solution

  • 3. Electrochemistry - Quiz


    SAMPLE QUESTIONS


    1. The reaction $Cu^{2+}\left (aq \right ) + 2Cl^{\circleddash}\left (aq \right ) \rightarrow Cu\left (s \right ) + Cl_{2}\left (g \right )$ has $E_{cell}^{\circleddash}$ = -1.03 V. This reaction
    a) Can be made to produce electricity in voltaic cell
    b) Can be made to occur in an electrolytic cell
    c) Can occur in acidic medium only
    d) Can occur in basic medium only

    2. Zn|Zn2+(c1) || Zn2+(c2)|Zn . For this cell ΔG is negative if:
    a) c1 = c2
    b) c1 > c2
    c) c2 > c1
    d) None

  • 4. Chemical Kinetics - Quiz


    SAMPLE QUESTIONS


    1.
                                                     A + B → C
      [A] [B] [Rate]
    1 1.0 1.0 0.25
    2 2.0 1.0 0.50
    3 1.0 2.0 0.25

    Rate is expressed in mol L-1 min-1.
    In the above reaction, the order is
    a) Zero in A and one in B
    b) One in A and zero in B
    c) One in both A and B
    d) Zero in both A and B

    2. The bromination of acetone that occurs in acid solution is represented by this equation
    CH3COCH3(aq) + Br2(aq) → CH3COCH2Br(aq) + H+(aq) + Br-(aq)
    These kinetic data were obtained for given reaction concentrations
                        Initial concentration, M
    [CH3COCH3]          [Br2]           [H+]
         0.30                 0.05            0.05
         0.30                 0.10            0.05
         0.30                 0.10            0.10
         0.40                 0.05            0.20
    Initial rate, disappearance of Br2, M s-1
                    5.7 × 10-5
                    5.7 × 10-5
                    1.2 × 10-4
                    3.1 × 10-4
    Based on these data, the rate equation is
    a) Rate = k[CH3COCH3][H+]
    b) Rate = k[CH=COCH3][Br2]
    c) Rate = k[CH3COCH3][Br2[H+]2
    d) Rate = k[CH3COCH3][Br2][H+]

  • 5. Surface Chemistry - Quiz


    SAMPLE QUESTIONS


    1. Micelles are
    a) Ideal solution
    b) Associated colloids
    c) Adsorbed surfaces
    d) Absorbent solutes

    2. Which one of the following statements is correct?
    a) Brownian movement is more pronounced for smaller particles than for bigger ones
    b) Sols of metal sulphides are lyophilic
    c) Hardy schulze law states, the bigger the size of the ion, the greater is its coagulating power
    d) One would expect charcoal to adsorb chlorine more strongly than hydrogen sulphide.

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


    SAMPLE QUESTIONS


    1. Alkali metals do not exist in free state in nature because these are
    a) Very reactive
    b) Very volatile
    c) Metallic in nature
    d) Highly electronegative elements

    2. Which of the following metals can be extracted by smelting?
    a) Aluminium
    b) Magnesium
    c) Iron
    d) None of these

  • 7. The p-Block Elements - Quiz


    SAMPLE QUESTIONS


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


    SAMPLE QUESTIONS


    1. Which of the following is not the characteristic of zinc?
    a) It is volatile metal
    b) It dissolves in alkali forming sodium zincate
    c) It is brittle at very high temperatures
    d) Zinc dust is used as a reducing agent

    2. Which transition metal has lowest density?
    a) Sc
    b) Ti
    c) Zn
    d) La

  • 9. Coordination Compounds - Quiz


    SAMPLE QUESTIONS


    1. The correct order of magnetic moment (spin values in BM) is
    (Atomic number Mn = 25, Fe = 26, Co = 27)
    I. [MnBr4]2- II. [Fe(CN)6]4- III. [CoBr4]2-
    a) II > III > I
    b) I > III > III
    c) II > I > III
    d) I > III > II

    2. In [Co(C2O4)3]2-, the isomerism shown as
    a) Ligand
    b) Optical
    c) Geometrical
    d) Ionisation

  • 10. Haloalkanes and Haloarenes - Quiz


    SAMPLE QUESTIONS


  • 11. Alcohols, Phenols and Ethers - Quiz


    SAMPLE QUESTIONS


    1. Benzene diazonium chloride on reaction with phenol in a basic medium gives:
    a) Diphenyl ether
    b) p-Hydroxy azobenzene
    c) Chlorobenzene
    d) Benzene

    2. Consider te reaction
    C3H7OH+CH2-N2(Diazomethane) $\xrightarrow[]{HBF_{4}}$
    The leaving group is:
    a) $CH_{2}^{\circleddash }$
    b) N2
    c) $BF_{4}^{\circleddash }$
    d) $C_{3}H_{7}O^{\circleddash }$

  • 12. Aldehydes, Ketones and Carboxylic Acids - Quiz


    SAMPLE QUESTIONS


    1. Aldehydes and ketones will not form crystalline derivatives with
    a) sodium bisulphite
    b) phenyl hydrazine
    c) semicarbazide hydrochloride
    d) dihydrogen sodium phosphate

    2. Which of the following represents the correct decreasing order of acidic strength of following?
    (i) Methanoic acid
    (ii) Ethanoic acid
    (iii) Propanoic acid
    (iv) Butanoic acid
    a) (i)>(ii)>(iii)>(iv)
    b) (ii)>(iii)>(iv)>(i)
    c) (i)>(iv)>(iii)>(ii)
    d) (iv)>(i)>(iii)>(ii)

  • 13. Amines - Quiz


    SAMPLE QUESTIONS


  • 14. Biomolecules - Quiz


    SAMPLE QUESTIONS


    1. If the sequence of bases in one strand of DNA is ATGACTGTC then the sequence of bases in its complementary strands is:
    a) TACTGACAG
    b) TUCTGUCCUG
    c) GUAGTUAUG
    d) None of the above

    2. Which of the following statements is true for protein synthesis (translation)?
    a) Amino acids are directly recognised by m-RNA.
    b) The third base of the codon is less specific.
    c) Only one codon codes for an amino acid.
    d) Every t-RNA has more than one amino acid attachment.

  • 15. Polymers - Quiz


    SAMPLE QUESTIONS


  • 16. Chemistry in Everyday Life - Quiz


    SAMPLE QUESTIONS


  • 17. Nuclear Chemistry - Quiz


    SAMPLE QUESTIONS


    1. If 92U235 assumed to decay by emitting two α and one β-particles, the possible product of decay is
    a) 89Ac231
    b) 89Ac235
    c) 89Ac236
    d) 89Ac227

    2. The binding energy of an element is 64 MeV . If BE/nucleon is 6.4, then the number of nucleon are
    a) 10
    b) 64
    c) 16
    d) 6

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


    SAMPLE QUESTIONS


    1. Ozone is used for purifying water because
    a) It dissociates and release oxygen
    b) It does not leave any foul smell like chlorine
    c) It kills bacteria, cyst, fungi and acts as a biocide
    d) All of the above

    2. Which one has the lowest boiling point?
    a) H2O
    b) H2S
    c) H2Se
    d) KNO3

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


    SAMPLE QUESTIONS


    1. Estimation of reducing substance by the use of standard I2,
    I2 + 2S2O32- → S4O62- + 2I is called
    a) Iodimetry
    b) Iodometry
    c) Oxidising
    d) Reducing

    2. On heating NaX with H2SO4 and MnO2 the halogens that cannot be prepared is _____.
    a) I2
    b) Cl2
    c) Br2
    d) F2

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


    SAMPLE QUESTIONS


    1. The noble gas which behaves abnormally in liquid state is
    a) Xe
    b) Ne
    c) He
    d) Ar

    2. Percentage of Argon in air is
    a) Nearly half as that of CO2
    b) Nearly half a that of CO2
    c) nearly thirty times as that of CO2
    d) None of these

  • 21. Grignard Reagents & Organometallic Compounds - Quiz


    SAMPLE QUESTIONS


    1. Ethanoic propanoic anhydride on reaction with excess of MeMgBr gives the major product
    a)
    b)
    c)
    d)

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

  • 22. Oxydation 7 Reduction of Organic Compounds - Quiz


    SAMPLE QUESTIONS


    1. In Rosenmund reduction, which of the following does not poison the catalyst Pd?
    a) BaSO4
    b) S
    c) Quinoline
    d) Xylene

    2.
    a) reduce Tollens agent
    b) give Iodoform test
    c) form dioxime
    d) give ceric ammonium nitrate test

  • 23. Aliphetic & Aromatic Aldehyde and Ketones - Quiz


    SAMPLE QUESTIONS


    1. Which of the following aromatic compounds is least reactive towards electrophile substitutions?
    a)
    b)
    c)
    d)

    2. Which is the most effective ion in an SN2 displacement on methyl bromide?
    a) $C_{2}H_{5}O^{\circleddash }$
    b)
    c) $C_{6}H_{5}O^{\circleddash }$
    d) $CH_{3}COO^{\circleddash }$

  • 24. Carboxlic Acid & Its Derivatives - Quiz


    SAMPLE QUESTIONS


    1. Which of the following is expected to be most highly ionised in water?
    a) CH2ClCH2CH2COOH
    b) CH3CHClCH2COOH
    c) CH3CH2CCl2COOH
    d) CH3CH2CHClCOOH

    2. A hydrocarbon C6H12 decolourises bromine solution and yields n-hexane on hydrogenation. On oxidation with KMnO4 it affords two different monobasic acids of the type R-COOH. The compound is:
    a) Cyclohexene
    b) 2-Hexene
    c) 1-Hexene
    d) 3-Hexene

  • 25. Organic Compounds with Functional Group - Quiz


    SAMPLE QUESTIONS


    1. Gabriel synthesis is used for the preparation of:
    a) 10 amine
    b) 20 amine
    c) 30 amine
    d) All can be prepared

    2. The compound which on reaction with aqueous nitrous acid at low temperature produces an oily nitrosoamine is:
    a) Methylamine
    b) Ethylamine
    c) Diethylamine
    d) Triethylamine

  • 26. Synthetic and Natural Polymer - Quiz


    SAMPLE QUESTIONS


    1. Which of the following is not correct regarding terylene?
    a) Conensation polymer
    b) Synthetic fibre
    c) Step-growth polymer
    d) It is also called dacron

    2. A copolymer is:
    a) Styrene butadiene rubber
    b) Polythene
    c) Terylene
    d) Nylon

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


    SAMPLE QUESTIONS


    1. Which of the following combines with Fe2+ ions to from brown complex?
    a) NO
    b) N2O
    c) N2O3
    d) N2O5

    2. In NO3 ion, the number bond pair and lone pair of electrons on nitrogen atoms are
    a) 2,2
    b) 3,1
    c) 1,3
    d) 4,0