Class/Course - Medical Entrance

Subject - Chemistry

Total Number of Question/s - 3530

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  • 1. Some Basic Concepts of Chemistry - Quiz

    1. Which has maximum number of molecules?
    a) 7 g N2
    b) 2 g H2
    c) 16 g NO2
    d) 16 g O2

    2. The number of moles of oxygen in 1L of air containing 21% oxygen by volume, under standard conditions of
    a) 0.0093 mole
    b) 2.10 moles
    c) 0.186 mole
    d) 0.21 mole

  • 2. Atomic Structure - Quiz

    1. In the photoelectron emission, the energy of the emitted electron is
    a) greater than the incident photon
    b) same as that of the incident photon
    c) smaller than the incident photon
    d) proportional to the intensity of incident photon

    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. Which statement is not correct ?
    a) A sigma bond is weaker than a π-bond
    b) A sigma bond is stronger than a π-bond
    c) A double bond is stronger than a single bond
    d) A double bond is shorter than a single bond

    2. Among the following ions the pπ-dπ overlap could be present in
    a) $NO_{2}^{-}$
    b) $NO_{3}^{-}$
    c) $PO_{4}^{3-}$
    d) $CO_{3}^{2-}$

  • 4. Solutions - Quiz

    1. All form ideal solution except
    a) C6H6 and C6H5CH3
    b) C2H5Cl and C2H5I
    c) C6H5Cl and C6H5Br
    d) C2H5I and C2H5OH

    2. The vapour pressure of a solvent decreased by 10mm in two columns of mercury when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2 . What should be the mole fraction of the solvent if the decrease in the vapour pressure is to be 20mm of mercury
    a) 0.8
    b) 0.6
    c) 0.4
    d) 0.2

  • 5. States of Matter - Quiz

    1. Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mol L-1?(R = 0.082 L atm mol-1deg-1)
    a) At STP
    b) when V = 22.4 L
    c) When T = 12K
    d) Impossible under any conditions

    2. The root mean square speeds at STP for the gases H2, N2, O2 and HBr are in the order
    a) H2 < N2 < O2 < HBr
    b) HBr < O2 < N2 < H2
    c) H2 < N2 = O2 < HBr
    d) HBr < O2 < H2 < N2

  • 6. Nuclear Chemistry - Quiz

    1. Carbon-14 dating method is based on the fact that
    a) carbon-14 fraction is same in all objects
    b) carbon-14 is highly insoluble
    c) ratio of carbon-14 and carbon-12 is constant
    d) all of the above

    2. Sulphur = 35 (34.96903 u) emits a β -particle but no γ-ray . The product is chlorine = 35 (34.96885 u). The maximum energy emitted by the β - particle is
    a) 16.758 M2V
    b) 1.6758 MeV
    c) 0.16758 MeV
    d) 0.016758 MeV

  • 7. Chemical Equilibrium - Quiz

    1. If K1 and K2 are the respective equilibrium constants for the two reactions
    XeF6(g)+H2O (g) XeOF4(g)+2HF(g)
    XeO4(g) + XeF6(g) XeOF4 (g) + XeO3F2(g)
    The equilibrium constant of the reaction
    XeO4(g)+2HF(g) XeO3F2(g) + H2O(g)
    will be
    a) K1/(K2)2
    b) K1 . K2
    c) K1/K2
    d) K2/K1

    2. If the concentration of OH- ions in the reaction
    Fe(OH)3 (s) Fe3+(aq) + 3OH-(aq)
    decreased by$\frac{1}{4}$ times, then equilibrium concentration of Fe3+ will increased by
    a) 8 times
    b) 16 times
    c) 64 times
    d) 4 times

  • 8. Ionic Equilibrium - Quiz

    1. Solubility of MX2 type electrolytes is 0.5 × 10-4 mol/L, then find out Ksp of electrolytes.
    a) 5 × 10-12
    b) 25 × 10-10
    c) 1 × 10-13
    d) 5 × 10-13

    2. What is the [OH-] is the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?
    a) 0.10 M
    b) 0.40 M
    c) 0.0050 M
    d) 0.12 M

  • 9. Thermodynamics - Quiz

    1. One mole of an ideal gas at 300K is expanded isothermally from an initial volume of 1L to 10L. The ΔE for this process is (R = 2cal mol-1 K-1)
    a) 163.7 cal
    b) zero
    c) 1381.1 cal
    d) 9 L atm

    2. 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

  • 10. Chemical Kinetics - Quiz

    1. The reaction A→B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1h. What is the time taken for the conversion of 0.9 mole of A to 0.675 mole of B?
    a) 0.25 h
    b) 2 h
    c) 1 h
    d) 0.5 h

    2. The experiment data for the reaction  2A+B2 → 2AB is

    The rate equation for the above data is
    a) rate = k[B2]
    b) rate = k[B2]2
    c) rate = k[A]2[B]2
    d) rate= k[A]2[B]

  • 11. Electrochemistry - Quiz

    1. The efficiency of a fuel cell is given by
    a) ΔG/ΔS
    b) ΔG/ΔH
    c) ΔS/ΔG
    d) ΔH/ΔG

    2. The most convenient method to product the button of the ship made of iron is
    a) coating it with red lead oxide
    b) white tin plating
    c) connecting it with Mg block
    d) connecting it with Pb block

  • 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. Which of the following forms cationic micelles above certain concentration?
    a) Sodium ethyl sulphate
    b) Sodium acetate
    c) Urea
    d) Cteyl trimethyl ammonium bromide

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

    1. The reaction of H2O2 with hydrogen sulphide is an example of _________ reaction.
    a) addition
    b) oxidation
    c) reduction
    d) acidic

    2. Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?
    a) Argentite
    b) Galena
    c) Copper pyrite
    d) Sphalerite

  • 14. Chemical Periodicity - Quiz

    1. Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
    a) 3d3, 4s2
    b) 3d5, 4s1
    c) 3d5, 4s2
    d) 3d2, 4s2

    2. One of the characteristic properties of non-metals is that they
    a) are reducing agents
    b) form basic oxides
    c) form cations by electron gain
    d) are electronegative

  • 15. Comparative Study of Elements - Quiz

    1. Aqueous solution of ammonia consists of
    a) H+
    b) OH-
    c) $NH_{4}^{+}$
    d) $NH_{4}^{+}$ and OH-

    2. Which of the following statements is not correct for nitrogen?
    a) its electronegativity is very high
    b) d-orbitalss are available for bonding
    c) ot is a typical non-metal
    d) its molecule size is small

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

    1. The main reason for larger number of oxidation states exhibited by the actinides than the corresponding lanthanides , is
    a) lesser energy dissference between 5f and 6d orbitals than between 4f anf 5d orbitals
    b) larger atomic size of actinides than the lanthanides
    c) more energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
    d) greater reactive nature of the actinides than the lanthanides

    2. Among the following series of transition metal ions, the one in which all metal ions have 3d2 electronic configuration is: (At no : Ti = 22; V = 22; Cr = 24; Mn = 25)
    a) Ti3+, V2+, Cr3+, Mn4+
    b) Ti+, V4+, Cr6+, Mn7+
    c) Ti4+, V3+, Cr2+, Mn3+
    d) Ti2+, V3+, Cr4+, Mn5+

  • 17. Coordination Compounds - Quiz

    1. The number of grometrical isomers for [Pr(NH3)2]CL2 is
    a) 3
    b) 4
    c) 1
    d) 2

    2. Which of the following does not show optical isomerism? (en= ethylenediamine)
    a) [Co(en)2Cl2]+
    b) [Co(NH3)3Cl3]0
    c) [Co(en)Cl2(NH3)2]+
    d) [Co(en)3]3+

  • 18. Chemical Analysis - Quiz

    1. In steam distillation of toluene, the pressure of toluene in vapour is
    a) equal to the pressure of barometer
    b) less than the pressure of barometer
    c) equal to vapour pressure of toluene in simple distillation
    d) more than vapour pressure of toluene in simple distillation

    2. Which of the following techiques is more suitable for purification of cyclohexanone from a mixture containing benzoic acid, isoamyl alcohol, cyclohexane and cyclohexanone?
    a) Crystallisation
    b) IR spectroscopy
    c) Sublimation
    d) Evaporation

  • 19. General Organic Chemistry - Quiz

    1. In compound X all the bond angles are exactly 109028', X is
    a) chloromethane
    b) carbon tetrachloride
    c) iodoform
    d) chloroform

    2. The (R)- and (S)- enantiomers of an optically active compound differ in
    a) their solubility in a chiral solvent
    b) their reactivity with a chiral reagent
    c) their optical rotation of plane polarised light
    d) their melting point

  • 20. Hydrocarbons - Quiz

    1. Which is the correct symbol relating the hetero Kekule structure of benzene?
    b) →
    d) ↔

    2. In reaction .
    M = molecular, R = reagent. M and R , are
    a) CH3CH2Cl and NaOH
    b) CH2Cl.CH2OH and aq NaHCO3
    c) CH3CH2OH and HCl
    d) and heat

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

    1. When phenol is treated with CHCl3 and NaOH
    a) benzaldehyde
    b) salicyaldehyde
    c) salicyclic acid
    d) benzoic acid

    2. The alkyl halide is converted into an alcohol by
    a) addition
    b) substitution
    c) dehydrohalogenation
    d) elimination

  • 22. Aldehydes and Ketones - Quiz

    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 one of the following can be oxidised to the corresponding carbonyl compound?
    a) 2-hydroxy propane
    b) ortho-nitro phenol
    c) Phenol
    d) 2-methyl-2-hydroxy propane

  • 23. Carboxylic Acids and their derivatives - Quiz

    1. An ester (A) with molecular formula C9H10O2 was treated with excess of CH3MgBr and the complex so formed was treated with H2SO4 to given an olefin (B) Ozonolysis of (B) gave a ketone with molecular formula C8H8O which shows positive iodoform test. The structure of
    a) C6H5COOC2H5
    b) C6H5COOC6H5
    c) H3CCOCH2COC6H5
    d) P-H3CO-C6H4-COCH3

    2. Which one of the following esters cannot undergo Claisen self-condensation?
    a) CH3CH2CH2CH2COOC2H5
    b) C6H5COOC2H5
    c) C6H5CH2COOC2H5
    d) C6H11CH2COOC2H5

  • 24. Nitrogen Compounds - Quiz

    1. Indicate which nitrogen compound amongst the following would undergo Hofmann reaction?
    a) RCOHNCH3
    b) RCOONH4
    c) RCONH2
    d) RCONHOH

    2. For carbylamine reaction, we need hot alcoholic KOH and
    a) any primary amine and chloroform
    b) chloroform and silver powder
    c) a primary amine and an alkyl halide
    d) a mono alkyl amine and trichloromethane

  • 25. Polymers - Quiz

    1. which one of the following is not correctly matched?

    2. The monomer of the polymer
    c) CH3CH=CH.CH3
    d) CH3CH=CH2

  • 26. Biomolecules and Chemistry in Everyday Life - Quiz

    1. 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

    2. Which of the following is the sweetest sugar?
    a) Sucrose
    b) Glucose
    c) Fructose
    d) Maltose