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  • 1. Some Basic Concepts of Chemistry - Quiz


    SAMPLE QUESTIONS


    1. 100 g of ethylene polymerizes to polythene according to the equation:

    The mass of polythene produced will be
    a) 100 n g
    b) 100/n g
    c) 100 n/2 g
    d) 100 g

    2. Which of the following statements is correct about the reaction given below:
    4Fe(s) + 3O2(g) →2 Fe O3(s)
    a) Total mass of iron and oxygen in reactants = total mass of iron and oxygen in product therefore it follows law of conservation of mass:
    b) Total mass of reactants = tota mass of product ; therefore, law of multiple proportions is followed.
    c) Amount of Fe2O3 can be increased by taking one of the reactants (iron or oxygen) in excess
    d) Amount of Fe2O3 produced will decrease if the amount of any one of the reactants (iron or oxygen ) is taken in excess.

  • 2. Structure of Atom - Quiz


    SAMPLE QUESTIONS


    1. The energy of an electron in the first Bohr orbit of H atom is-13.6 eV. The possible energy value of the excited state (s) for electrons in Bohr orbits of hydrogen is
    a) -3.4 eV
    b) -4.2 eV
    c) -6.8 eV
    d) + 6.8 eV

    2. The radius of the first Bohr orbit of hydrogen atom is 0.59 . The radius of the third orbit of He+ will be
    a) 8.46
    b) 0.705
    c) 1.59
    d) 2.38

  • 3. Classification of Elements and Periodicity in Properties - Quiz


    SAMPLE QUESTIONS


    1. Which of the following configuration atoms of the element having the high ionization potential?
    a) 1 s2 2s2 2p4
    b) 1 s2 2s2 2p6
    c) 1s2 2s2 2p6 3s1
    d) 1s2 2s2 2p6 3s2

    2. Lattice energy of an ionic compound depends on
    a) Charge density of the ion
    b) Packing of ions only
    c) Size of the ion only
    d) Charge on the ions only

  • 4. Chemical Bonding and Molecular Structure - Quiz


    SAMPLE QUESTIONS


    1. Which is a corect statement about diborane structure?
    a) All HBH bond angles are equal
    b) All H-B bond lenghts are equal
    c) It has two three centre-2 electron bonds
    d) All hydrogen and boron atoms are in one plane

    2. Which of the following are non-polar molecules?
    I. NCI3 II. SO3 III.PCI5
    a) I only
    b) II only
    c) I and II only
    d) II and III only

  • 5. States of Matter - Quiz


    SAMPLE QUESTIONS


    1. If temperature changes from 270C to 1270C, the relative percentage change in rms velocity is
    a) 1.56
    b) 2.56
    c) 15.6
    d) 82.4

    2. The density of air is 0.00130 g/ml. The vapour density of air will be
    a) 0.00065
    b) 0.65
    c) 14.4816
    d) 14.56

  • 6. Thermodynamics - Quiz


    SAMPLE QUESTIONS


    1. The change of energy on freezing 1.00 kg of liquid water at 00 C and 1 atm is
    a) 236.7 kJ kg-1
    b) 333.4 kJ kg-1
    c) -333.4 kJ kg-1
    d) -236.7 KJ Kg-1

    2. In view of the sign of Δr G0 for the following reactions : PbO2 + Pb →2 Pb O, δr G0 < 0
    SnO2 + Sn → 2 SnO, δR g0 > 0
    Which oxidation states are more characteristic for lead and tin?
    a) For lead +4, for tin +2
    b) For lead +2, for tin +2
    c) For lead +4, for tin +4
    d) For lead +2, for tin +4

  • 7. Equilibrium - Quiz


    SAMPLE QUESTIONS


    1. Which of the following solvents are aprotic?
    (1) NH3 (2) SO2 (3) CH3CN (4) CH3CO2H
    a) 1, 2, 3
    b) 1, 3, 4
    c) 2, 3
    d) 1, 3

    2. A solutions containing Na2CO3 and NaOH requires 300 mL of 0.1 N HCI using phenolphthalein as an indicator. Methyl orange is then added to above titrated solution when a further 25 mL of 0.2 M HCI is required. The amount of NaOH present in the original solution is
    a) 0.5 g
    b) 1 g
    c) 2 g
    d) 4 g

  • 8. Redox Reactions - Quiz


    SAMPLE QUESTIONS


    1. Which of the following is not an example of redox reaction?
    a) CuO + H2 →Cu + H2O
    b) Fe2O32
    c) 2 K + F2 → 2 KF
    d) BaCI2 + H2 SO4 → BaSO4 + 2 HCI

    2. Which of the following is the strongest reducing agent in aqueous medium?
    a) Mg
    b) Na
    c) Li
    d) Ca

  • 9. Hydrogen - Quiz


    SAMPLE QUESTIONS


    1. Decomposition of H2O2 is a disproportionation reaction.
    a) True
    b) False

    2. Hydride ion is a strong
    a) Conjugate acid of H2
    b) Conjugate base of H2
    c) Conjugate acid of H-
    d) Conjugate base of H+

  • 10. The s-Block Elements - Quiz


    SAMPLE QUESTIONS


    1. Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is
    a) BeCI2
    b) MgCI2
    c) CaCI2
    d) SrCI2

    2. Gypsum on heating to 390 K gives
    a) CaSO4 . 2H2O
    b) CaSO4
    c) CaSO4 . 1/2 H2O
    d) SO3 and CaO

  • 11. The p-Block Elements - Quiz


    SAMPLE QUESTIONS


    1. When treated with conc.HNO3. Aluminium is rendered ___________due to the formation of a protective layer of its ___________on the surface of the metal.
    a) Oxide, passive
    b) Passive, oxide
    d) None of these

    2. The correct formula of borax is
    a) Na2[B4O5(OH)4]. 8H2O
    b) Na2B4O7.4H2O
    c) Na2[B4O5(OH)4.] H2O
    d) Na2B4O7.8H2O

  • 12. Organic Chemistry – Some Basic Principles and Techniques - Quiz


    SAMPLE QUESTIONS


    1. The kind of delocalization involving σ-bond orbitals is called__________.
    a) Hyperconjugation
    b) Resonance Effect
    c) Electromeric Effect
    d) Inductive Effect

    2. Which of the following is correct regarding the -I-effect of the substituents?
    a) -NR2 < -OR < -F
    b) -NR2 > -OR < -F
    c) -NR2 < -OR > -F
    d) -NR2 > -OR > -F

  • 13. Hydrocarbons - Quiz


    SAMPLE QUESTIONS


    1. The reagents for the following conversion

    a) Alcoholic KOH
    b) Alcoholic KOH followed by NaNH2
    c) Aqueous KOH followed by NaNH2
    d) Zn/CH3OH

    2. An alkyl halide by formation of its Grignard reagent and heating with water gives propane. What is the original alkyl halide?
    a) Methyl iodide
    b) Ethyl iodide
    c) Ethyl bromide
    d) Propyl bromide

  • 14. Environmental Chemistry - Quiz


    SAMPLE QUESTIONS


    1. Which of the following has greatest affinity for haemoglobin?
    a) CO
    b) NO
    c) O2
    d) CO2

    2. London smog is ____________in nature whereas photochemical smog is ___________in nature.
    a) Oxidizing , reducing
    b) Reducing, oxidizing
    c) acidic, basic
    d) None of these

  • 15. Chemical Equlibrium - Quiz


    SAMPLE QUESTIONS


    1. The equilibrium constant Kp for a homogeneous gaseous reaction is 10-8. The standard Gibbs free energy change $\Delta$$G^{\circleddash}$ for the reaction (using R = 2 cal K-1 mol-1) is
    a) 10.98 kcal
    b) -1.8 kcal
    c) -4.1454 kcal
    d) +4.1454 kcal

    2. In a chemical reaction
    N2 + 3H2 $\rightleftharpoons$ 2NH3, at equilibrium point
    a) Equal volume of N2 and H2 are reacting
    b) Equal masses of N2 and H2 are reacting
    c) The reaction has stopped
    d) The same amount of ammonia is formed as is decomed into N2 and H2

  • 16. Ionic Equlibrium - Quiz


    SAMPLE QUESTIONS


    1. KSP of Mg(OH)2 is 1 x 10-12, 0.01 M MgCl2 will be precipitating at the limiting pH:
    a) 8
    b) 9
    c) 10
    d) 12

    2. A certain buffer solution contains equal concentration of $X^{\circleddash}$ and HX . The Kb for $X^{\circleddash}$ is 10-10 . The pH of the buffer is
    a) 4
    b) 7
    c) 10
    d) 14

  • 17. Alkanes and Cycloalkanes - Quiz


    SAMPLE QUESTIONS


    1. 2-Methyl butane on reacting with Br2 in sunlight mainly gives:
    a) 1-Bromo-2-methyl butane
    b) 2-Bromo-2-methyl butane
    c) 2-Bromo-3-methyl butane
    d) 1-Bromo-3-methyl butane

    2. Which of the statements is correct?
    I. Melting point of alkane increases with increase of C atoms and with increase in branching.
    II. Boiling point of alkane increases with increase of C atoms but with increases with increase of C atoms but with decrease in branching.
    III. Cycloalkanes have lower boiling point than normal alkane with same number of C atoms.
    IV. Alkenes have lower boiling point than same number of C atoms in alkanes.
    a) (I),(II)
    b) (I),(II),(III)
    c) (III),(IV)
    d) (IV)

  • 18. Alkenes and Alkadienes - Quiz


    SAMPLE QUESTIONS


    1.
    Which statement is true?
    i. The product is
    ii. The product is
    iii. The reaction is called alkoxymercuration-demercuration (a type of solvomercuration-demercuration).
    iv. If proceeds via Markonikov addition, anti-addition of and ROH ( as nucleophilic solvent), and no rearrangement.
    a) (i)
    b) (ii)
    c) (i), (iii) and (iv)
    d) (ii), (iii), and (iv)

    2. What is the wrong statement?
    a) In oxymercuration and demercuration reaction, alcohol is formed by Markonvikov addition.
    b) In hydroboration oxidation reaction , alcohol is formed by anti-Merkonikov addition.
    c) Regiospecificity of HBO reaction is syn.
    d) Regispecificity of oxymervuration and demercuration reaction is anti and rearrangement occurs.

  • 19. Alkynes - Quiz


    SAMPLE QUESTIONS


    1. Interconversion of terminal to internal alkyne and vice versa takes place by the following reagents (A) and (B) .

    Reagents (A) and (B) are :
    a) NaNH2 and alc. KOH
    b) alc. KOH and NaNH2
    c) alc. KOH and P-2 catalyst
    d) NaNH2 and Lindlar catalyst

    2. In the reaction , source of two H atoms which are added to alkyne to give trans-alkene is:
    a) NH3
    b) EtOH
    c) Et-NH2
    d) Both (a) and (c)

  • 20. s-Block Elements (Alkaline Earth Metal) - Quiz


    SAMPLE QUESTIONS


    1. Mg is precipitated and estimated gravimetrically as:
    a) Mg(NH4)PO4
    b) Mg(NH4)PO4.6H2O
    c) Mg2P2O7
    d) Mg3(PO4)2

    2. Solubility of alkaline earth metal carbonates in water is as follows:
    a) BeCO3 > MgCO3 > CaCO3 > BaCO3
    b) BeCO3 > CaCO3 > MgCO3 > BaCO3
    c) BeCO3 < MgCO3 < CaCO3 < BaCO3
    d) BaCO3 < BeCO3 < MgCO3 < CaCO3

  • 21. p-Block Group 14 (Carbon Family) - Quiz


    SAMPLE QUESTIONS


    1. Which of the following anions are present in clay?
    a) (Si2O52-)n
    b) (Si4O116-)n
    c) (SiO32-)n
    d) (SiO44-)

    2. In silicon dioxide
    a) There are double bonds between silicon and oxygen atoms
    b) Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bounded to two silicon atoms
    c) Silicon is bonded to two silicon atoms
    d) Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms

  • 22. Classification & Nomenclature of Organic Compounds - Quiz


    SAMPLE QUESTIONS


    1. The IUPAC name of the following compound is:

    a) Propane-1, 2, 3-tricarbonitrile
    b) 3-Cyanopetane-1, 5-dinitrile
    c) Pentane- 1, 3, 5-trinitrile
    d) All

    2. Which of the following has only 10 and 20 C atoms?
    a) 2-Methyl butane
    b) Butane
    c) 2,2-Dimethyl butane
    d) 2,2,3,3-Tetramethyl pentane

  • 23. Quantitative & Qualitative Analysis - Quiz


    SAMPLE QUESTIONS


    1. 0.3 hm of platinichloride of an organic diacidic base left 0.09 gm of platinum on ignition. The molecular weight of the organic base is:
    a) 120
    b) 240
    c) 180
    d) 60

    2. In Liebigs method for the estimation of C and H, if the compound also contains N, which of the following is kept near the exist of the combustion tube?
    a) Silver wire
    b) PbCrO4
    c) Both (a) and (b)
    d) Cu gauge

  • 24. Isomerism - Quiz


    SAMPLE QUESTIONS


    1. Pure enantiomeric acid +optically active alcohol having chiral C atom → ?
    The product will be
    a) An optically active compound
    b) A meso compound
    c) A racemic mixture
    d) A pure enantiomer

    2. The number of geometrical isomers in CH3CH=N-OH is :
    a) 2
    b) 4
    c) 5
    d) 6

  • 25. General Organic Chemistry - Quiz


    SAMPLE QUESTIONS


    1. The decreasing nucleophilicity of the following is :
    I. $CH_{3}S^{\circleddash }$ II. $CH_{3}O^{\circleddash }$ III. IV. $EtO^{\circleddash }$
    a) IV > III > II > I
    b) I > II > III > IV
    c) IV > III > I > II
    d) II > I > III > IV

    2. Which of the following is a soft base
    a) NH3
    b) R2S
    c) Cu+
    d) H2O

  • 26. Organic Reaction & Mechanism - Quiz


    SAMPLE QUESTIONS


    1. Rearrangement reactions are shown by:
    a) Carbanion
    b) Free radical
    c) Carbene
    d) Carbocation

    2. Which statement is correct about the following reaction?

    a) Product is by elimination reaction
    b) Product is by substitution reaction
    c) Both (a) and (b)
    d) none