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 number of significant figures for the three numbers 161 cm, 0.161 cm, 0.0161 cm are
    a) 3,4 and 5 respectively
    b) 3,4 and 4 respectively
    c) 3,3 and 4 respectively
    d) 3,3 and 3 respectively

    2. The molecular weight of O2 and SO2 are 32 and 64 respectively. At 150C and 150mmHg pressure, lL of O2 contains 'N; molecules. The number of molecules in 2L of SO2 under the same conditions of temperature and pressure will be
    a) N/2
    b) N
    c) 2N
    d) 4N

  • 2. Atomic Structure - Quiz

    1. Which of the following configuration is correct for iron?
    a) 1s2,2s22p6, 3s23p6, 3d5
    b) 1s2,2s22p6, 3s23p6, 4s2, 3d5
    c) 1s2,2s22p6, 3s23p6, 4s2, 3d7
    d) 1s2,2s22p6, 3s23p63d6, 4s2

    2. The measurement number of the electron position associated with an uncertainty in mometum which is equal to 1 × 10-18 g cm s-1. The uncertainty in electron velocity is , (mass of an electron is 9 × 10-28g)
    a) 1× 109 cm s-1
    b) 1 × 106 cm s-1
    c) 1 × 105 cm s-1
    d) 1 × 1011 s-1

  • 3. Chemical Bonding - Quiz

    1. The type of hybridisation of boron in diborane is
    a) sp-hybridisation
    b) sp2-hybridisation
    c) sp3-hybridisation
    d) sp3d2-hybridisation

    2. Which of the following does not have a tetrahedral structure?
    a) $BH_{4}^{-}$
    b) BH3
    c) $NH_{4}^{+}$
    d) H2O

  • 4. Solutions - Quiz

    1. Formation of a solution from two components can be considered as
    (1) pure solvent → separated solvent molecules , ∆H1
    (2) Pure solvent →separated solute molecules , ∆H2
    (3) separated solvent and solute molecules, → solution , ∆H3
    Solution so formed will be ideal , if
    a) ∆Hsoln = ∆H1 - ∆H2 - ∆H3
    b) ∆Hsoln = ∆H3 - ∆H1 - ∆H2
    c) ∆Hsoln = ∆H1 + ∆H2 + ∆H3
    d) ∆Hsoln = ∆H1 + ∆H2 - ∆H3

    2. The vapour pressure of benzene at a certain temperature is 640mmHg. A non-volatile and non-electrolyte solid, weighing 2.175 g is added to 39.08g of benzene. If the vapour pressure of the solution is 600mmHg, what is the molecular weight of solid substance?
    a) 49.50
    b) 59.60
    c) 69.40
    d) 79.82

  • 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. Internal energy and pressure of a gas per unit volume are related as
    a) p = $\frac{2}{3}E$
    b) p = $\frac{3}{2}E$
    c) p = $\frac{1}{2}E$
    d) p = 2E

  • 6. Nuclear Chemistry - Quiz

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

    2. In the following radioactive decay,
    92C23289Y220, how many α and β particles are ejected from X and Y ?
    a) 3α and 2 β
    b) 5α and 3β
    c) 3α and 3β
    d) 5α and 5β

  • 7. Chemical Equilibrium - Quiz

    1. The equilibrium constants for the reaction A2 2A at 500K and 700K are 1 × 10-10 and 1 × 10-5. The given reaction is
    a) exothermic
    b) slow
    c) endothermic
    d) fast

    2. For the reaction,
    CH4(g) + 2O2(g) CO2(g) + 2H2O(l)
                                       ∆rH = -170.8 J mol-1
    Which of the following statements is not true?
    a) At equilibrium , the concentrations of CO2 (g) and H2O(l) are not equal
    b) The equilibrium constant for the reaction is given by Kp = $\frac{[CO_{2}]}{[CH_{4}][O_{2}]}$
    c) Addition of CH4(g) or O2(g) at equilibrium will cause a shift to the right
    d) The reaction is exothermic

  • 8. Ionic Equilibrium - Quiz

    1. Which has highest pH?
    a) CH3COOK
    b) Na2CO3
    c) NH4Cl
    d) NaNO3

    2. The solubility product of a sparingly soluble salt AX2 is 3.2 × 10-11 . Its solubility (in mol/L ) is
    a) 5.6 × 10-6
    b) 3.1 × 10-4
    c) 2 × 10-4
    d) 4 × 10-4

  • 9. Thermodynamics - Quiz

    1. The enthalpy and entropy change for the reaction
                   Br2(l) + Cl2(g)  →  2BrCl(g)
    are 30 kJ mol-1 and 105 JK-1 mol-1 respectively. the temperature at which the reaction will be in equilibrium is
    a) 285.7 K
    b) 273 K
    c) 450 K
    d) 300 K

    2. The densities of graphite and diamond at 298 K are 22.5 and 3.31 g cm-3, respectively. If the standaed free energy difference (ΔG0) is equal to 1895 J mol-1, the pressure at which graphite will be transformed into diamond at 298 K is
    a) 9.92 × 106 Pa
    b) 9.92 × 105 Pa
    c) 9.92 × 105 Pa
    d) 9.92 × 107 Pa

  • 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. Half-life period of a first order reaction is 1386s. The specific rate constant of the reaction is
    a) 5.0 × 10-3 s-1
    b) 0.5 × 10-2 s-1
    c) 0.5 × 10-3 s-1
    d) 5.0 × 10-3 s-1

  • 11. Electrochemistry - Quiz

    1. In electrolysis of NaCl when Pt electrode is taken than H2 is liberated at cathode while eith Hg cathode it forms sodium amalgam because
    a) Hg is more inert than Pt
    b) more voltage is required to reduce H- at Hg than at Pt
    c) Na is dissolved in Hg while it does not dissolved in Pt
    d) concentration of H+ ions is larger when Pt electrode is taken

    2. Standard electrode potentials are
    Fe2+/Fe , E0 = -0.44 V
    Fe3+ /Fe2+ , E0 = 0.77 V
    Fe2+, Fe3+ and Fe block are kept together, then
    a) Fe3+ increases
    b) Fe3+ decreases
    c) $\frac{Fe^{2+}}{Fe^{3+}}$ remains unchanged
    d) Fe2+ decreases

  • 12. Surface Chemistry - Quiz

    1. The langmuir adsorption isotherm is deduced by using the assumption that
    a) the adsorption takes place in multilayers
    b) the adsorption sites are equivalent in their ability to adsorb the particles
    c) the heat of adsorption varies with coverage
    d) the adsorbed molecules interact with each other

    2. Position of non-polar  and polar parts in micelle is
    a) polar at outer surface but non-polar at inner surface
    b) polar at inner surface but non-polar at outer surface
    c) distributed all over the surface
    d) present in the surface only

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

    1. Cassiterite is an ore of
    a) Mn
    b) Ni
    c) Sb
    d) Sn

    2. Which of the following metal evolves hydrogen on reacting with cold dilute HNO3?
    a) Mg
    b) Al
    c) Fe
    d) Cu

  • 14. Chemical Periodicity - Quiz

    1. If the atomic number of an element is 33, it will be placed in the periodic table in the
    a) first group
    b) third group
    c) fifth group
    d) seventh group

    2. In crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions?
    a) LiF
    b) CsF
    c) CsI
    d) LiI

  • 15. Comparative Study of Elements - Quiz

    1. Compared with the alkaline earth metals, the alkali metals exhibit
    a) smaller ionic radii
    b) higher boiling points
    c) greater hardness
    d) lower ionisation energies

    2. Which of the following is a nitric acid anhydride?
    a) NO
    b) NO2
    c) N2O5
    d) N2O3

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

    1. More number of oxidation states are exhibited by the actinides than by the lanthanides. The main reason for this is
    a) more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
    b) lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
    c) greater metallic character of the lanthanides than that of the corresponding actinides
    d) more active nature of the actinides

    2. Which one of the following forms a colourless solution in aqueous medium?
    (Atomic number : Sc = 21,Ti = 22, V = 23, Cr = 24)
    a) V3+
    b) Cr3+
    c) Ti3+
    d) Sc3+

  • 17. Coordination Compounds - Quiz

    1. Which of the following is considered to be an anticancer species?

    2. [Co(NH3)4(NO2)2]Cl exhibits
    a) linkage isomerism , geometrical isomerism and optical isomerism
    b) linkage isomerism, ionisation isomerism and optical isomerism
    c) linkage isomerism, ionisation isomerism and geometrical isomerism
    d) ionisation isomerism, geometrical isomerism and optical isomerism.

  • 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. The most suitable method of the seperation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1:1 is
    a) distillation
    b) crystallisation
    c) vaporisation
    d) colour spectrum

  • 19. General Organic Chemistry - Quiz

    1. obtained by chlorination of n-butane, will be
    a) meso form
    b) racemic mixture
    c) d-form
    d) l-form

    2. Which of the following compounds will exhibit cis-trans (geometrical ) isomerism?
    a) 2-butene
    b) butanol
    c) 2-butyne
    d) 2-butenol

  • 20. Hydrocarbons - Quiz

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

    2. The alkene R-CH=CH2 reacts readily with B2H6 and formed the product B which on oxidation with alkaline H2O2 produces
    a) R-CH2-CHO
    b) R-CH2-CH2-OH

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

    1. 2-bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is
    a) 2-ethoxypentane
    b) pentene-1
    c) trans-pentene-2
    d) cis-pentene-2

    2. Which one of the following compounds is most acidic?
    a) ClCH2-CH2OH

  • 22. Aldehydes and Ketones - Quiz

    1. Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc HCl is called
    a) Clemmensen reduction
    b) Cope reduction
    c) Dow reduction
    d) Wolff-Kishner reduction

    2. Polarisation of electrons in acrolein may be written as

  • 23. Carboxylic Acids and their derivatives - Quiz

    1. In the following reaction, product P is
    a) RCH2OH
    b) RCCOH
    c) RCHO
    d) RCH3

    2. 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

  • 24. Nitrogen Compounds - Quiz

    1. Mark the correct statement.
    a) Methyl amine is slightly acidic
    b) Methyl amine is less basic than ammonia
    c) Methyl amine is a stronger base than NH3
    d) Methyl amine forms salts with alkalies

    2. Aniline in a set of reactions yielded a product D.

    The structure of the product D would be
    a) C6H5CH2NH2
    b) C6H5NHCH2CH3
    c) C6H5NHOH
    d) C6H5CH2OH

  • 25. Polymers - Quiz

    1. Which one of the following is used to make non-stick cookware?
    a) PVC
    b) Polystyrene
    c) Polyethylene tetraphthalate
    d) Polytetrafluro ethylene

    2. Which one of the following monomers gives the polymer neoprene on polymerization?
    b) CF2=CF2
    c) CH2=CHCl
    d) CCl2=CCl2

  • 26. Biomolecules and Chemistry in Everyday Life - Quiz

    1. αD(+)-glucose and βD(+)-glucose are
    a) anomers
    b) epimers
    c) enantimers
    d) geometerical isomers

    2. Glucolysis is
    a) oxidation of glucose to pyruvate
    b) conversion of glucose to haem
    c) oxidation of glucose to glutamate
    d) conversion of pyruvate to citrate