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Chemistry Mcqs for Medical Entry Test Preparation

  • Chemistry Mcqs For Medical Entry Test Preparation

  • 1- isotopes are sister atoms of same element with similar chemical properties but different
    (a) atomic number
    (b)atomic volume
    (c)atomic mass
    (d)atomic structure
  • 2-cadmium has isotopes
    a-3
    b-6
  • c-9
    d-12
  • 3-atomic masses of elements were determined by
    a-john Dalton
    b-Berzelius
    c-Avogadro
    d-Democritus
  • 4-what is the mass of one mole of Iodine molecule.
    a-53
    b-74
    c-250
    d-254
  • 5-in combustion analysis CO2 is absorbed in
    a-mg(ClO4)2
    b-lime water
    c-concentrated H2SO
    d-50%KOH
  • 6-the collection of Avogadro no of [articles represent
    a-molecule
    b-empirical formula
    c-formula unit
    d-mole
  • 7-CO+ is an example of
    a-free radical
    b-cationic molecular ion
    c-stable molecule
    d-anionic molecular ion
  • 8-which of the following has the max num of moles
    a-1g of H2O
    B-40g of H2O
    C-36g of H2O
    d- none
  • 9-%of O2 in H2O is
    a-80%
    b-88.8%
    c-70%
    d-none
  • 10-the SI unit of measurement of quantity is
    a-atom
    b-formula
    c-mole
    d-molecule
  • 11-what quantity of limestone CaCO3 on heating will give 56kg of CaO
    a-1000kg
    b-100kg
    c-60kg
    d-all
  • 12-how many moles of hydrogen occupy 22.4dm3of Volume at S.T.P are
    a-0.1
    b-0.90
    c-1.0
    d-none
  • 13-the largest number of molecules in
    a-36g of H2O
    B-46g of C2H5OH
    c-28g of CO2
    d-all
  • 14-the %of o2 in NaOH is
    a-16
    b-32
    c-64
    d-40
  • 15-which of the following has least mass
    a-2g of O2
    b-1mole of Na
    c-3*1023atom
    s of carbon
    d-8g of Ag
  • 1-which of the following has the least critical temperature
    a-NH3
    b-H2O
    c-O2
    4-CO2
  • 2-kinetic energy of 3 moles of a gas is
    a-3RT
    b-RT/2
  • c-2RT
    d-3/2RT
  • 3-the value of gas constant depends upon
    a-temp
    b-volume
    c-no of moles
    d-units of volume and pressure
  • 4-at which temp, the hydrogen will have same kinetic energy as nitrogen molecules at 280K/
    a-280K
    B-400K
    C-40K
    D-50K
  • 5-the root mean square velocity of an ideal gas at constant pressure varies with demsity as
    a-d^2
    b-d
    c-(d)^1/2
    d-1/(d)^1/2
  • 6-which of the following deviates more from the ideal gas behaviour?
    a-HCL
    B-CH4
    C-He
    d-N2
  • 7-oxygen gas contained in a flask at S.T.P was replaced by SO2under same conditions . the weight of S02 will be
    a-equal to O2
    b-half of O
    c-twice that of O2
    d-thrice that of O2
  • 8-which of the following molecules have max root mean square velocity at 25 degree
    a-CO2
    B-H2S
    C-NH3
    D-SO2
  • 9-equal volumes of H2 and He are present in the same vessel.the pressure exerted by H2 and He are in the same ratio
    a-1:1
    b-2;1
    c-1:2
    d-4;1
  • 10-linds method is employed for
    a-separation of gases
    b-expansion of gases
    c-compression of gases
    d-liquefaction of gases
  • 11-what will be the pressure of 1mole of an ideal gas maintained at 300k and 250cm^3 volume
    a-98.5atm
    b-96.7atm
    c-95.8atm
    d-97.1atm
  • 12-hydrogen diffuses four times more rapidly than volume of an unknown gas,, molar mass of unknown gas will be
    a-16g/mole
    b-32g/mole
    c-48g/mole
    d-64g/mole
  • 13-the kinetic theory of gases was put forward in 1738 by
    a-Boltzmann
    b-Maxwell
    c-Clausius
    d-Bernoulli
  • 14-the partial pressure of O2in air is
    a-760torr
    b-323torr
    c-159torr
    d-116torr
  • 15-what is the simplest form of matter
    a-liquid
    b-gas
    c-solid
    d-plasma
  • 16- critical temp of gas depends upon
    a-size of molecules
    b-shape of molecules
    c-intermolecular forces
    d- all
  • 17-the diffusion of gases at absolute zero will be
    a-unchanged
    b-slightly decreased
    c-slightly increased
  • 18-at constant temp the pressure of an ideal gas is doubled,,its density becomes
    a-half
    b-double
    c-same
    d-none
  • 19-0.5 mole of NO2 and 0.5 mole of SO2 gas have equal
    a-volume
    b-molecules
    c-mass
    d-atoms
  • 20-which one has the lowest density at room temperature
    a-Ne
    b-N2
    c-NH3
    d-CO
  • 21-which of these gases diffuses more quickly than O2
    a-H2S
    B-NO
    C Cl2
    d-N20
  • 22-under what conditions real gases deviate from ideal behaviour
    a-high temperature
    b-low temperature
    c-high pressure
    d-both b and c
  • 23-which of the flowing gasses diffuse more readily
    A-Cl2
    B-CO2
    C-CH4
    D-N2
  • 24-according to Graham’s law..The rat of diffusion of H2 and 02 gases have the ratio
    a-1:4
    b-1:(4)^1/2
    c-4:1
    d-3:32
  • 25-absolute zero is equal to
    a –273.16k
    b- -459F
    c- 273.16C
    d- 273.15 K
  • 26- which one of the following gases is more ideal at S.T.P
    a- SO2
    B- NH3
    C-H2
    D-H2S
  • 27-which gas deviate more from ideal behaviour at high pressure
    a-H2
    B- He
    c-Ar
    d-H2S
  • 28-eight grams of each of 02 nd H2 at 27C will have total kinetic energy in the ratio
    a-1:1
    b-16:1
    c-8;1
    d-1:16
  • 29-which pair of gases do not obey Dalton law of partial pressure
    a-H2 and O2
    b- N2 and O2
    c-NH3 and HCL
    d-H2 and He
  • 30-which gas cannot be dried by passing over H2SO4
    a-SO2
    B-H2
    C-NO2
    D-H2S
  • 31-which one of the following molecules has the max root mean square velocity a 25C
    a-C02
    B-H2S
    C-NH3
    D-CO2
  • 32-which of the following is the SI unit of pressure
    a-ATM
    b-Torr
    c-pascal
    d-pounds per square inch
  • 33-10dm^3 of gas is maintained at 50C and 5atm. if pressure is doubled and absolute temp is halved,the new volume will be
    a-10dm3
    b-20dm3
    c-2.5dm3
    d-5dm3
  • 34-ammonia gas diffuses twice as fast as does a gas. the most probable gas is
    a-SO2
    B-C4H10
    C-C5H8
    D-Cl2
  • 35-the rat of diffusion of gas (molar mass=72) as compared to H2 will bee
    a-1/6 times
    b-2times
    c-6times
    d-same
  • 36- at higher pressure isotherm moves away from the y axis due to
    a-pressure
    b-volume
    c-no of moles
    d-all of above
  • 1. Which one of the following compounds does not obey Octet rule
    a. PF3
    b. BF3
    c. NF3
    d. AsF3
  • 2. Maximum energy is required to remove an electron from
    a. s-orbital
    b. p-orbitals
    c.d-orbitals
  • d. f-orbitals
  • 3. Among halogens, maximun electron affinity is shown by—-
    a. Iodine
    b. Bromine
    c. Chlorine
    d. Flourine
  • 4. Bonding maybe 100% ionic when electro-negativity difference is—-
    a. 0.9
    b.1.7
    c. 2.4
    d. 3.4
  • 5. Ionic bonding is usually formed between the elements of ——– of periodic table
    a. Group I and group VII
    b. GroupII and group VII
    c. Group I and group VI
    d. All of above
  • 6. Which one of the following is a non-polar copmpound.
    a. CHCl3
    b. CH3OH
  • c. CCl4
    d. CH3Cl
  • 7. How many C0-Ordinate bonds are present in HCLO4.
    a. 4
    b. 3
    c.2
    d.1
  • 8. Valence shell electron pair repulsion theory was developed by——
    a. Gillespie
    b. Sidgwick
    c. Powell
    d.All of above
  • 9. Which molecule has a non-linear shape.
    a. MgCl2
    b. CdCl2
    c. SrCl2
    d. SnCl2
  • 10. According to VSPER theory ,ammonia molecule has——shape
    a. Tetrahedral
    b.Trigonal
    c. Pyramidal
    d. Triangular
  • 11. In fluorine molecule, single covalent bond is formed by the ——
    a.S-S overlap
    b. p-p direct overlap
    c. S-p overlap
    d. p-p sideways overlapping
  • 12. Ethyne molecule has—–sigma bonds
    a. 1
    b.2
    c.3
    d.4
  • 13. Energies of molecular orbitals are determined by ———measurements
    a. Spectroscopic
    b. Kinetic
    c.Thermal
    d.Thermodynamics
  • 14. Bond order of Oxygen in O2+2 ion is—–
    a. 1
    b.2
    c.two and half
    d. 3
  • 15. Carbon atom of Carbonyl group in ACETONE has——-hybridization
    a. sp3
    b. sp2
    c..sp
    d. None of above.
  • 16. Which one of the following molecules has the highest dipole moment.
    a. H2S
    b. SO2
    c.H2O
    d. NO2
  • 17. Covalent bond maybe regarded as—–
    a. Rigid and directional
    b. Rigid and non-directional
    c. Non-rigid and directional
    d. Non-rigid and non-directional
  • 18. During the formation of chemical bond , energy of the system—–
    a. Increases
    b.Decreases
    c.Remains constant
    d.Does not change
  • 19. Size of an atom is expressed in terms of——–
    a. Atomic radius
    b.Covalent radius
    c. Vander waal’s radius
    d. All of above
  • 20. The bond angles in NH3 and NF3 mlecules have relationship
    a.Same angles
    b. NH3 has less angle
    c. NF3 has less angle
    d. None of above
  • 21. The bonding present in ammonium chloride is———
    a. Covalent
    b.Ionic
    c. C0-ordinate
    d. All of above
  • 22. The S.I unit of dipole moment is——-
    a.Faraday
    b.Metre coulomb
    c.Debeye
    d.none
  • 23. The orbit having lowest energy is—-
    a. Atomic orbital
    b.Hybrid orbital
    c. Bonding molecular orbital
    d. Anti bonding molecular orbital
  • 24. The species having small size is
    a. Fe2+
    b. Fe1+
    c. Fe
    d. Fe1-
  • 25. Which one of the following species may have 100%ionic bonding
    a. CsF
    b. NaCl
    c.KBr
    d. None of above
  • 26. All the atoms are coplanar in the molecule———-
    a. CH4
    b. BF3
    c. PH3
    D. NH3
  • 27. Maximum paramagnetic behavior is shown by the species—–
    a. O2+1
    b. O2+2
    c. O2
    D. O2-2
  • 28. Carbon atoms in propene molecule are———–hybridized
    a. sp2
    b. sp3
    c. Both
    d. None
  • 29. Electro-negativity values are usually expressed in the unit——
    a. No unit
    b. Kilo-calorie
    c.Kilo Joule
    d. Kilo-calorie per mole
  • 30. Ionic bond formation in sodium chloride is mainly due to———-
    a. Ionization energy of sodium
    b. Electron affinity of Chlorine
    c. Lattice energy of sodium chloride
    d. All of above
  • 31. The formation of Co -ordinate complex compound by transition elements can be explained on the basis of ————theory
    a. Valence bond
    b. Ligand field
    c. Molecule orbital
    d. VSPER
  • 32. Bonding in phosphonium ion is —– percent covalent
    a. 25
    b. 33
    c.50
    d.75
  • 1- which one of the following solution will have the highest b.p
    a. 5.85% solution of sodium chloride
    b- 18% solution of glucose
    c- 6% solution of urea
    d- all have the same boiling point
  • 2- sea water contains 5*10-3 g of dissolved oxygen in one kilogram of water. the concentration of oxygen in ppm is
    a. 0.05
    b. 0.5
  • c. 5.0
    d. 50
  • 3. cheese is an example of solution of
    a. liquid into solid
    b. solid into liquid
    c. liquid into liquid
    d. solid into solid
  • 4. compound having max solubility at 25 C
    a. NaCl
    b. KNO3
    C.CaCl2
    d. HCl
  • 5. which one of the following salts donot undergo hydrolysis
    a. copper sulphate
    b. sodium carbonate
    c. sodium sulphate
    d. aluminum chloride
  • 6. when one mole of solute is dissolved in one kg solvent, depression 9n freezing point is called
    a. cryoscopic constant
    b. molao freezing point solution
    c. both
    d, none
  • 7. a deci-molal solution of glucose contains
    a. 18g kg -1
    b. 1.8g per 100g
    c- 180g per 10kg
    d- all
  • 8. when 2 g of sodium carbonate is dissolved in 20 g of water, percentage by weight of solution is
    a.10
    b. 9
    c. 8
    d. 5
  • 9. the pair of liquids which is practically immiscible.
    a. benzene and carbon tetrachloride
    b. benzene and water
    c. ethanol and water
    d. none
  • 10. a solution of glucose is 10%. one gram mole of it will be dissolved in
    a.1dm3
    b. 1.8 dm3
    c. 2 dm3
    d. 4 dm3
  • 11. when chlorobenzene is mixed with bromobenzene to form a solution then heat is
    a. absorbed
    b.evolved
    c. niether absorbed nor evolved
    d. either absorbed or evolved
  • 12. in ice cream machine freezing mixture consist of ice and
    a. NaCl
    b. NaNO3
    C. KCl
    d. KNO3
  • 14. A solution of water and ethanol has vapour pressure
    a. equal to water
    b. eual to ethanol
    c. less than water
    d. more than water
  • 15. a solution of sucrose is 34.2%. the volume of solution containing one mole of solute is
    a. 600cm3
    b. 1000cm3
    c. 300cm3
    d. 3000cm3
  • 16. 10g of NaOH has been dissolved per dm3 of solution . the molarity of solution is
    a. 1.5M
    b. 0.25M
    c. 2M
    d. 3M
  • 17. calcium chloride in the hydrated form can exist in ———— different types
    a. 2
    b.3
    c. 4
    d. 5
  • 18. the compound has max solubility at o0c
    a. CaCl2
    b. KNO3
    C. HCl
    D. NaNO3
  • 19. concentration unit which is not affected by temperature is
    a. molarity
    b. normality
    c. molality
    d. all
  • 20. which will cook food more easily
    a. saline water
    b. pure water
    c. alcoholic water
    d. acidic water
  • 21. molal boiling point constant for water is 0.52%. if 6g of urea is dissolved in 100g of water , what will be its boiling point
    a. 99.48
    b.100.52
    c. 99
    d. 100
  • 22. in a solution 7.8g of benzene and 46 g of toulene (C6H5CH3) are present. the mole fraction of benzene is
    a. 1/2
    b. 1/3
    c. 1/5
    d. 1/6
  • 23. in the hydrates water molecules are attracted to
    a.cations
    b.anions
    .c. both
    d. none
  • 24. which of the following has the max boiling point at 1atm pressure
    a. 0.1M NaCl
    b. 0.1M sucrose
    c. 0.1M BaCl2
    d. 0.1M glucose
  • 25. camphor is often used in molecular mass dtermination because
    a. it can dissolve oraganic substances
    b. it is readily available
    c. it has very high cryoscopic constant
    d. it is volatile
  • 1- According to HESSES law,therml effects of a reaction depends upon?
  • a-initial concentration of reactants
    b-initial and final concentrations of reacting substances
    c-final conditions of the reacting substances
    d-catalyst
  • 2-when ammonium chloride is dissolved in water,the solution becomes cold.the change is?
    a-endothermic
    b-exothermic
  • c-super cooling
    d-chemical
  • 3-how much heat is liberated when 100ml of 0.1M NaOH are completely neutralized by 100ml of 0.1 MHCl?
    a–57kj
    c- -5.7kj
    d- -6.05kj
  • 4-BORN HEBER cycle is called
    a-complete enthalphy cycle
    b-complete energy cycle
    c-complete internal energy cycle
    d-complete heat cycle
  • 5-the atom X nd Y have the electronic configuration shown below
    X. 1s2 2s2 2p6 3s2 3p6 3d10 4s2
    Y.1s2 2s2 2p4
    which of the following components are they likely to form
    a-XY
    b-XY2
    c-X2Y
    d-XY4
  • 6-which of the following moleculeshas zero dipole moment
    a-NH3
    B- CHCL3
    C-H2O
  • D-BF3
    7-ehich of the hydrogen halides has the highest percentage of ionic character
    a-HCl
    b-HBr
    c-HF
    d-HI
  • 8-which of the following species has unpaires electrons in antibonding molecular orbital
    a-O2-2
    b- N2-2
    c-B2
    d- F2
    9-the molecule with largest dipole moment
    a-BCl3
    b- CO2
    c-CO
    d-CH4
  • 10-during formation of ionic bond between sodium and chlorine
    A- Na attains yhe configuration of Ne
    B- Na attains the configuration of Ar
    C-Cl attains the configuration of Ne
    D- Cl attains the configuration of Na
  • 11-the degree of polarity of molecule is called
    A-bond energy
    B-dipole moment
    C-ionic character
    D-coordinate character
  • 12-VESPER theory explains
    A- geometrical shape of molecules
    B-sharing of electrons
    C-ionic charater
    D-paramagnetic nature of substance
  • 13-which theory explains that pair of electrons around the central atom lie at maximum distance so they experience minimum repulsion
    A- V.B theory
    B- VESPER theory
    C- MO theory
    D- kinetic mooleculr theory
  • 14- in sp2 hybridises orbital the s character is
    A-11 PERCENT
    B-22 PERCENT
    C-33 PERCENT
    D-44 PERCENT
  • 15-which one has expected to have highest bond energy
    A-CH4
    B-HCl
    C-HF
    D-all
    16- in a sigma bond formed between two hydrogen atoms, the electron cloud will be dense
    a-on the sides of nuclei
    b-below the bonded nuclei
    c-in between to bonded nuclei
    d-above the bonded nuclei
    17-chemical bond formation takes place when
    a-energy is absorbed
    b-force of attraction is equal to force of repulsion
    c-force of repulsion overcomes the force of attraction
    d-force of attraction overcomes force of repulsion
  • 18-which change would have negative DELTA H value
    a- Nas——->Nag
    b-Clg + e——->Cl-
    c-Nag———-> Na+ +e
    d-none
  • 19- DELTA H and DELTA E are same when the system under study is
    a-gas
    b-solid
    c-liquid
    d- both solid and liquid
    20- if you have two different polar diatomic molecules,their dipole moment will be
    a-equal
    b-different
    c-zero
    d-less than zero
  • 21-which has two pi bonds
    a-ethane
    b-ethene
    c-ethyne
    d-ether
  • 22-which of the following has the covalent bond
    a-HCl
    b-CaCl2
    c-AlCl3
    d-NaH
  • 23-structure of ammonia molecule is
    a- pyramidal
    b-linear
    c-angular
    d-planar
  • 24-chlorine atom gains the electrons in its valence shell because of its high
    a-E.A values
    b-I.E values
    c-E.N values
    d-noe of the above
  • 25-dipole moments are measured in
    a-coloumb metere
    b- Nm
    c-Jm
    d-J
  • 26-Which of the following has the greater bond distance
    a-HF
    b-HBr
    c-HCl
    d-HI
  • 27-an atom of an element consist of 5 protons, neutrons,2k electrons and 3 L Electrons.the mass num of this atom is
    a-13
    b-9
    c-8
    d-5
  • 28-the num of orbitals t\in d subshell is
    a-1
    b-3
    c-4
    d-5
  • 29- valence bond theory is unable to explain
    a-paramagnetism of O2 moecule
    b-shape ofO2 molecule
    c-stability ofN2 molecule
    d-double and triple bond
  • Chemistry Mcqs For Medical Entry Test Preparation

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