Class/Course - Medical Entrance

Subject - Chemistry

Total Number of Question/s - 3530

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  • 1. Some Basic Concepts of Chemistry - Quiz

    1. The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270Kg of aluminium metal from bauxite by by the Hall process is (Atomic mass of Al = 27)
    a) 180Kg
    b) 270 Kg
    c) 540 Kg
    d) 90 Kg

    2. At STP, the density of CCl4 vapour in g/L will be nearest to
    a) 6.87
    b) 3.42
    c) 10.26
    d) 4.57

  • 2. Atomic Structure - Quiz

    1. The total number of electrons that can be accomodated in all the orbitals having principal quantum number 2 and azimuthal quantum number 1 are
    a) 2
    b) 4
    c) 6
    d) 8

    2. The energy absorbed by each molecule (A2) of substance is 4.4 × 10-19 J and bond energy per molecule is 4.0 × 10-19 J . The kinetic energy of the molecule per atom will be
    a) 2.0 × 10-20J
    b) 2.2 × 10-19 J
    c) 2.0 × 10-19 J
    d) 4.0 × 10-20 J

  • 3. Chemical Bonding - Quiz

    1. Main axis of a diatomic molecule is z, molecular orbital px and py overlaps to form, which of the following orbitals?
    a) π-molecular orbital
    b) σ-molecular orbital
    c) δ-molecular orbital
    d) no bond will form

    2. Which one of the following is the correct order of interactions?
    a) Covalent < hydrogen bonding < van der waals < dipole-dipole
    b) van der waals < hydrogen bonding < dipole-dipole < covalent
    c) van der wasls < dipole-dipole < hydrogen bonding < covalent
    d) Dipole-dipole < vanderwaals < hydrogen bonding < covalent

  • 4. Solutions - Quiz

    1. The vapour pressure , at a given temperature, of an ideal solution containing 0.2 mole of a non-volatile solute and 0.8 mole of solvent is 60 mm of Hg. The vapour pressure of the pure solvent at the same pressure is
    a) 150mm of Hg
    b) 60 mm of Hg
    c) 75 mm of Hg
    d) 120 mm of Hg

    2. The relative lowering of vapour pressure is equal to the ratio between the number of
    a) solute molecules to the solvent molecules
    b) solute molecules to the total molecules in solution
    c) solvent molecules to the total molecules in the solution
    d) solvent molecules to the total number of ions of the solute

  • 5. States of Matter - Quiz

    1. The appearance of colour in solid alkali metal halides is generally due to
    a) F-centres
    b) Schottky defect
    c) Frenkel defect
    d) Interestitial positions

    2. For orthorhombic system axial ratios are a≠b≠c and the axial angles are
    a) α = β = γ ≠ 900
    b) α = β = γ = 900
    c) α = γ = 900, β ≠ 900
    d) α ≠ β ≠ &gamma ≠ 900

  • 6. Nuclear Chemistry - Quiz

    1. 92U235 + 0n1 → fission product + neutron + 19.293 × 109J. The energy released, when 1g of 92U235 finally underegoes fission, is
    a) 12.75 × 108 kJ
    b) 18.60 × 109 kJ
    c) 8.21 × 107 kJ
    d) 6.55 × 106 kJ

    2. India has the world largest deposites of thorium in the form of
    a) rutile
    b) magnesite
    c) lignite
    d) monazite

  • 7. Chemical Equilibrium - Quiz

    1. The dissociation constants for acetic acid and HCN at 250C are 1.5 × 10-5 and 4.5 × 10-10, respectively. The equilibrium constant for the equilibrium ,
    would be
    a) 3.0 × 105
    b) 3.0 × 10-5
    c) 3.0 × 10-4
    d) 3.0 × 104

    2. The value of equilibrium constant of the reaction
    HI(g)  $\frac{1}{2}$H2(g) + $\frac{1}{2}$I2(g) is 80
    The equilibrium constant of the reaction
     H2(g) + I2(g)   2HI(g) will be
    a) $\frac{1}{16}$
    b) $\frac{1}{64}$
    c) 16
    d) $\frac{1}{8}$

  • 8. Ionic Equilibrium - Quiz

    1. Ionisation constant of CH3COOH is 1.7 × 10-5 and concentration of H+ ions is 3.4 × 10-4 . Then, find out initial concentration of CH3COOH molecules.
    a) 3.4 × 10-4
    b) 3.4 × 10-3
    c) 6.8 × 10-4
    d) 6.8 × 10-3

    2. Solution of 0.1N NH4OH and 0.1 N NH4Cl has pH 9.25, then find out pKb of NH4OH.
    a) 9.25
    b) 4.75
    c) 3.75
    d) 8.25

  • 9. Thermodynamics - Quiz

    1. For the gas phase reaction,
                      PCl5(g)  PCl3(g) + Cl2(g)
    which of the following conditions are correct?
    a) ΔH = 0 and ΔS < 0
    b) ΔH > and ΔS > 0
    c) ΔH < 0 and ΔS < 0
    d) ΔH > 0 and ΔS < 0

    2. In a closed insulated container a liquid is stirred with a paddle to increase the temperature which of the following is true?
    a) ΔE = W ≠ 0 , q= 0
    b) ΔE = W = 0, q ≠ 0
    c) ΔE = 0, W = q ≠ 0
    d) W = 0, ΔE = q ≠ 0

  • 10. Chemical Kinetics - Quiz

    1. The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, k = Ae-E/RT. Activation energy (E*) of the reaction can be calculated by plotting
    a) log k vs $\frac{1}{T}$
    b) log k vs $\frac{1}{log T}$
    c) k vs T
    d) k vs $\frac{1}{log T}$

    2. The rate of the first order of reaction is 1.5 × 10-2 mol L-1 min-1 at 0.5 M concentration of the reactant. The half-life of the reaction is
    a) 0.383 min
    b) 23.1 min
    c) 8.73 min
    d) 7.53 min

  • 11. Electrochemistry - Quiz

    1. The emf of a Daniel cell at 298 K is E1

    when the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the emf changed to E2. What is the relationship between E1 and E2 ?
    a) E1 > E2
    b) E1 < E2
    c) E1 = E2
    d) E2 = 0 ≠ E1

    2. The equilibrium constant of the reaction,
    Cu(s) + 2Ag+(aq) → Cu2+ (aq) + 2Ag(s) ; E0 = 0.46 V at 298 K is
    a) 2.0 × 1010
    b) 4.0 × 1010
    c) 4.0 × 1015
    d) 2.4 × 1010

  • 12. Surface Chemistry - Quiz

    1. The method usually employed for the precipitation of a colloidal solution is
    a) dialysis
    b) addition of electrolytes
    c) diffusion through animal membrane
    d) condensation

    2. If a beam of light is passed through true solution, then it is
    a) visible
    b) scatter
    c) not visible
    d) none of these

  • 13. Metallurgical Operations, Hydrogen and its Compounds - Quiz

    1. Calgon used as a water softner , is
    a) Na2[Na4(PO3)6]
    b) Na4[Na2(PO3)6]
    c) Na4[Na4(PO4)5]
    d) Na4[Na2(PO4)6]

    2. Purification  of aluminium by electrolytic refining is known as
    a) Halls process
    b) Baryers process
    c) Hoopes process
    d) Serpecks process

  • 14. Chemical Periodicity - Quiz

    1. The ions O2-, F-, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show
    a) an increase from O2- to F2- and then decrease from Na+ to Al3+
    b) a decrease from O2- to F- and then increase from NA+ to Al3+
    c) a significant increase from O2- to Al3+
    d) a significant decrease from O2- to Al3+

    2. Which electronic configuration of an element has abnormally high difference between second and third ionisation energy?
    a) 1s2, 2s2, 2p6, 3s1
    b) 1s2, 2s2, 2p6, 3s23p1
    c) 1s2, 2s2 , 2p6, 3s23p2
    d) 1s2, 2s2, 2p6, 3s2

  • 15. Comparative Study of Elements - Quiz

    1. Conesugar on reaction with nitric acid gives
    a) CO2 and SO4
    b) 2HCOOH
    c) (COOH)2
    d) no reaction

    2. The acid which has a peroxy linkage is
    a) sulphorous acid
    b) pyrosulphuric acid
    c) dithionic acid
    d) Caros acid

  • 16. d- and f-Block Elements - Quiz

    1. In the silver plating of copper, K[Ag(CN)2] is used instead of AgNO3 . The reason is
    a) a thin layer of Ag is formed on Cu
    b) more voltage is required
    c) Ag+ ions are completely removed from solution
    d) less availability of Ag+ ions, as Cu cannot displace Ag from [Ag(CN)2]- ion

    2. When CuSO4 is electrolysed using platinum electrodes
    a) copper is liberated at cathode, sulphur at anode
    b) copper is liberated at cathod, oxygen at anode
    c) sulphur is liberated at cathode, oxygen at anode
    d) oxygen is liberated at cathode, copper at anode

  • 17. Coordination Compounds - Quiz

    1. The formula of dichlorobis (urea) copper (II) is
    a) [Cu{O=C(NH2)2Cl}]Cl
    b) [CuCl2(O=C(NH2)2}2]
    c) [Cu(O=C(NH2)2}]Cl2
    d) [CuCl2(O=C(NH2)2H2}]

    2. Which of the following does not have a metal-carbon bond?
    a) Al(OC2H5)3
    b) C2H5MgBr
    c) K[Pt(C2H4)Cl3]
    d) Ni(CO)4

  • 18. Chemical Analysis - Quiz

    1. An organic compound containing C, H and N gave the following results on analysis C = 40%, H = 13.33% , N = 46.67%. Its empirical formula would be
    a) C2H7N2
    b) CH5N
    c) CH4N
    d) C2H7N

    2. A organic compound contains C = 40% , O = 53.34% and H = 6.60% . The empirical formula of the compound is
    a) CH2O
    b) CHO
    c) CH4O2
    d) C2H2O

  • 19. General Organic Chemistry - Quiz

    1. IUPAC name of the compound

    a) trans-3-iodo-4 chloro-3-pentene
    b) cis-2-chloro-3-iodo-2- pentene
    c) trans-2-chloro-3-iodo-2-pentene
    d) cis-3-iodo-4-chloro-3-pentene

    2. For the compound
    which of the following IUPAC names is correct?
    a) 2-methyl-3-ethyl pentane
    b) 3-ethyl-2-methyl pentane
    c) 2-ethyl-2-methyl pentane
    d) 3-methyl-2-ethyl-pentane

  • 20. Hydrocarbons - Quiz

    1. Which alkene on ozonolysis gives CH3CH2CHO and ?
    b) CH3CH2CH=CHCH2CH3
    c) CH3CH2CH=CHCH3

    2. In Friedel-Craft's alkylation, besides AlClthe other reactants are
    a) C6H6 + NH2
    b) C6H6 + CH4
    c) C6H6 + CH3Cl
    d) C6H6 + CH3COCl

  • 21. Alkyl Halides, Alcohols, Phenols and Ethers - Quiz

    1. The compound which reacts fastest with Lucas reagent is ( at room temperature)
    a) butan-1-ol
    b) butan-2-ol
    c) 2-methyl propan-1-ol
    d) 2-methyl propan-2-ol

    2. Chlorobenzene reacts with Mg in dry ether to give a compound (A) which further reacts with ethanol to yield
    a) phenol
    b) benzene
    c) ethyl benzene
    d) phenyl ether

  • 22. Aldehydes and Ketones - Quiz

    1. In this reaction:

    an asymmeteric centre is generated. The acid obtained would be
    a) 50%D+50% L-isomer
    b) 20%D+80% L-isomers
    c) D-isomer
    d) L-isomer

    2. (CH3)3-CHO does not undergo aldol condensation due to
    a) three electron donating methyl groups
    b) cleavage taking place between -C-CHO bond
    c) absence of alpha hydrogen atom in the molecule
    d) bulky (CH3)3C-group

  • 23. Carboxylic Acids and their derivatives - Quiz

    1. Schotten-Baumann reaction is a reaction of phenols with
    a) benzoyl chloride and NaOH
    b) acetyl chloride and NaOH
    c) salicyclic acid and conc H2SO4
    d) acetyl chloride and conc H2SO4

    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)

  • 24. Nitrogen Compounds - Quiz

    1. The final product C, obtained in the reaction

    would be

    2. Aniline when diazotised in cold and then treated with dimethyl aniline, gives a coloured product. Its structure would be

  • 25. Polymers - Quiz

    1. In elastomer, the intermolecular forces are
    a) strong
    b) weak
    c) nil
    d) None of these

    2. [NH(CH2)NHCO(CH2)4CO  is a
    a) copolymer
    b) addition polymer
    c) thermo-setting polymer
    d) homopolymer

  • 26. Biomolecules and Chemistry in Everyday Life - Quiz

    1. Which one of the following is a peptide hormone?
    a) Glucagon
    b) Testosterone
    c) Thyroxin
    d) Adrenaline

    2. The αD- glucose and βD-glucose differ from each other due to difference in carbon atom with repect to its
    a) conformation
    b) configuration
    c) number of OH groups
    d) size of hemiacetal ring