Kerala Engineering Architecture Medical Admission Entrance Exam with 60 chemistry sample practice questions with answers.
Ques. According to the Arrhenius equation a straight line is to be obtained by ploting the logarithm of the rate constant of a chemical reaction (log k) against
(a) T
(b) log T
(c) 1/T
(d) log 1/T
Ques. An alkene on ozonolysis yields ethanal. There is an isomer of this which on ozonolysis yields
(a) Propanone and methanol
(b) Propanone and ethanol
(c) Ethanal and methanol
(d) Only propanone
Ques. The mass of copper deposited from a solution of CuSO4 by passage of 5 A current for 965 second is (Mol. wt. of Copper = 63.5)
(a) 15.875 g
(b) 1.5875 g
(c) 4825 g
(d) 96500 g
Ques. 1 L of N2 combines with 3 L of H2 to form 2L of NH3 under the same conditions. This illustrates the
(a) Law of constant composition
(b) Law of multiple proportions
(c) Law of reciprocal proportions
(d) Gay-Lussac’s law of gaseous volumes
Ques. Atomic hydrogen reacts with oxygen to give
(a) Almost pure water
(b) Almost pure hydrogen peroxide
(c) A mixture of water and hydrogen peroxide
(d) None of these
Ques. The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ is
(a) 1
(b) 2
(c) 3/2
(d) 3
Ques. Nitrobenzene is not used in
(a) Skraup’s quinoline synthesis
(b) Friedel-Crafts reaction
(c) The form of a cheap fragrance
(d) The preparation of trinitrotoluene
Ques. Nitroethane is formed as the main product in the reaction of silver nitrate on ethyl bromide. What should be the mechanism of this reaction?
(a) Free radical addition
(b) SN2
(c) Ionic mechanism
(d) SN1
Ques. Coagulating power is maximum in
(a) Na+
(b) Ba+2
(c) Al+3
(d) An+4
Ques. At the top of the mountain the thermometer reads 0°C and the barometer reads 710 mm Hg. At the bottom of the mountain the temperature is 30°C and pressure is 760 mm Hg. Density of air at the top with that at the bottom is
(a) 1 : 1
(b) 1.04 : 1
(c) 1 : 1.04
(d) 1.15
Ques. Which of the following is formed on heating a mixture of 1-butyne and 2-butyne with dilute sulphuric acid in the presence of mercuric sulphate
(a) Butanone
(b) Butanal
(c) Mixture of butanal and butanone
(d) Isobutyraldehyde
Ques. The boiling point of benzene is 353.23 K. When 1.80 gm of a nonvolatile solute was dissolved in 90 gm of benzene, the boiling point is raised to 354.11 K. the molar mass of the solute is [Kb for benzene = 2.53 K mol–1]
(a) 5.8 g mol–1
(b) 0.58 g mol–1
(c) 58 g mol–1
(d) 0.88 g mol–1
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Ques. For 3 A + 2B D 2C + D, initial mol of A is double of B. At equilibrium mol of A and D are equal. Hence % dissociation of A is
(a) 50%
(b) 25%
(c) 75%
(d) None of these
Ques. Which of the following reaction can be used to convert an aldehyde to an ester having double the number of carbon atoms?
(a) Oppenauer oxidation
(b) Aldol condensation
(c) Tischenko reaction
(d) Cannizzaro reaction
Ques. Which of the following is expected to form colourless complex
(a) Ni2+
(b) Cu+
(c) Ti3+
(d) Fe3+
Ques. Smoke is an example of
(a) Solid dispersed in gas
(b) Solid dispersed in solid
(c) Solid dispersed in liquid
(d) Gas dispersed in solid
Ques. Molisch’s test is done for the detection of
(a) Alkyl halide
(b) Carbohydrate
(c) Alkaloid
(d) Fat
Ques. Values of the four quantum numbers for the last electron in the atom are n = 4, l = 1, m = + 1 and s = –1/2. Atomic number of the atom will be
(a) 22
(b) 32
(c) 33
(d) 36
Ques. How many isomers are possible in [Co(en)2Cl2]
(a) 2
(b) 4
(c) 6
(d) 1
Ques. Which one in the following contains ionic as well as covalent bond?
(a) CCl
(b) HCl
(c) KCN
(d) KCl
Ques. Which of the following statements is false
(a) Catalyst starts the reaction
(b) Catalyst remains unchanged in amount and constitution after the reaction
(c) Catalyst does not shift the equilibrium in a reversible reaction
(d) None of these
Ques. What is [(CH3)2 C = CH]2C = O
(a) A ketene
(b) A trimer of acetone
(c) An unsaturated aldehyde
(d) A Dimer of acetone
Ques. Which of the following carboxylic acids cannot give Hell-Volhard-Zelinsky reaction?
(a) CH3COOH
(b) HCOOH
(c) C2H5COOH
(d) C4H9COOH
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Ques. Which of the following indicators is used in the estimation of HClO4 and KOH
(a) Phenolphthalein
(b) Methyl orange
(c) Litmus
(d) All of the above
Ques. To an aqueous solution of AgNO3 some NaOH(aq) is added, till a brown ppt. is obtained. To this H2O2 is added dropwise. The ppt. turns black with the evolution of O2. The black ppt. is
(a) Ag2O
(b) Ag2O2
(c) AgOH
(d) None of these
Ques. The formation of acetophenone by the reaction of acetyl chloride and benzene in the presence of AlCl3 is called
(a) Curtius reaction
(b) Aldol condensation
(c) Friedel-Crafts reaction
(d) Perkin reaction
Ques. Elements of which group form anions most readily ?
(a) Oxygen family
(b) Nitrogen group
(c) Halogens
(d) Alkali metals
Ques. If equal amounts of zinc are heated separately with excess of H2SO4 and NaOH, respectively, then what will be the ratio of volumes of H2 released
(a) 1:2
(b) 2:1
(c) 1:3
(d) 1:1
Ques. Which of the following is not related to the colloids
(a) Dialysis
(b) Brownian motion
(c) Ultrafiltration
(d) Wavelength
Ques. Considering hydrides, how the valency of elements change from group I to group VII of the periodic table
(a) 1, 2, 3, 4, 5, 6, 7
(b) 1, 2, 3, 4, 3, 2, 1
(c) 1, 3, 5, 7, 5, 3, 1
(d) 7, 6, 5, 4, 3, 2, 1
Ques. A 0.001 molal solution of [Pt(NH3)4Cl4)] in water had a freezing point depression of 0.0054oC. If Kf for water is 1.80, the correct formulation for the above molecule is
(a) [Pt(NH3)4Cl3]Cl
(b) [Pt(NH3)4Cl]Cl2
(c) [Pt(NH3)4Cl2]Cl3
(d) [Pt(NH3)4Cl4]
Ques. Degree of dissociation of HCl is 95% and 0.192 gram acid is present in 0.5 litre solution, then its pH will be
(a) 2.1
(b) 1.0
(c) 3.0
(d) 8.0
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Ques. I+, I–, I, in order of decreasing size
(a) I–, I+, I
(b) I+, I, I–
(c) I–, I, I+
(d) I, I+, I–
Ques. For adsorption of a gas on a solid, if a graph between log X/M and log p is drawn, then a straight line is obtained. Its internal segment is equal to which of the following
(a) K
(b) log K
(c) – log K
(d) 1/n
Ques. How many isomers of C5H11OH will be primary alcohols
(a) 2
(b) 3
(c) 4
(d) 5
Ques. Which sample contains the largest number of atoms?
(a) 1 mg of C4H10
(b) 1 mg of N2
(c) 1 mg of Na
(d) 1 mL of water
Ques. A vessel contains 1 mole of O2 gas (molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (molar mass 4) at a temperature 2T has a pressure of
(a) P/8
(b) P
(c) 2P
(d) 8P
Ques. Freezing point of which of the following is minimum
(a) 0.2M Na2CO3
(b) 0.1M(NH4)2SO4
(c) 0.2M NaOH
(d) 0.1MAgNO3
Ques. Three isotopes of an element have mass numbers, M, (M + 1) and (M + 2). If the mean mass number is (M + 0.5) then which of the following ratios may be accepted for M, (M + 1), (M + 2) in the that order
(a) 1 : 1 : 1
(b) 4 : 1 : 1
(c) 3 : 2 : 1
(d) 2 : 1 : 1
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Ques. Which of the following substances adsorbs hydrogen gas most strongly?
(a) Activated charcoal
(b) Silica gel
(c) Platinum black
(d) Iron powder
Ques. The ratio of velocity of electron for the system : H [first orbit]. He+ [second orbit] and Li+2 [third orbit] would be
(a) 1 : 1 : 1
(b) 1 : 2 : 3
(c) 3 : 2 : 1
(d) 2 : 3 : 1
Ques. Two elements X and Y have following electronic configurations X = 1s2, 2s2 2p6, 3s2 3p6, 4s2 and Y = 1s2, 2s2 2p6, 3s2 3p5. The expected compound formed by combination of X and Y is
(a) XY2
(b) X5Y2
(c) X2Y5
(d) XY5
Ques. When CO2 under high pressure is released from a fire extinguisher, particles of solid CO2 are formed, despite the low sublimation temperature of CO2 at 1.0 atm (-77°C). It is due to
(a) The gas does work pushing back the atmosphere using, KE of molecules and thus lowering the temperature
(b) Volume of the gas is decreased rapidly hence temperature is lowered
(c) Both correct
(d) None of correct
Ques. The telluric helix was given by
(a) De Chan Courtois
(b) Newlands
(c) L. Meyer
(d) Mendeleeff
Ques. Which behaves both as a nucleophile and electrophile
(a) CH3NH2
(b) CH3Cl
(c) CH3CN
(d) CH3OH
Ques. Volume strength of 1.5N H2O2 will be
(a) 8.4
(b) 4.6
(c) 3.0
(d) 8.0
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Ques. In the modern periodic table, elements are arranged in
(a) Increasing mass
(b) Increasing volume
(c) Increasing atomic number
(d) Alphabetically
Ques. Which of the following is non-electrolyte
(a) NaCl
(b) CaCl2
(c) C12H22O11
(d) CH3COOH
Ques. Which of the following reaction involves the formation of an acid azide as an intermediate species?
[A] Mustard reaction
[B] Curtius reaction
[C] Schmidt reaction
[D] Hypobromite reaction
(a) A and C
(b) B and C
(c) B and D
(d) C and D
Ques. The rates of diffusion of SO3, CO2, PCl3 and SO2 are in the following order
(a) PCl3 > SO3 > SO2 > CO2
(b) CO2 > SO2 > PCl3 > SO3
(c) SO2 > SO3 > PCl3 > CO2
(d) CO2 > SO2 > SO3 > PCl3
Ques. Electrode potentials is Zn2+|Zn and Cu2+|Cu are – 0.76V and 0.34V, respectively. What is the e.m.f. of the cell formed between the two electrodes
(a) 0.42V
(b) – 1.1 V
(c) – 0.42 V
(d) 1.10 V
Ques. Which of the following pairs has both members from the same group of the periodic table
(a) Mg–Ba
(b) Mg–Na
(c) Mg–Cu
(d) Mg–Cl
Ques. What will be the order of osmotic pressure of isomolar solutions of BaCl2, NaCl and sucrose
(a) Sucrose> BaCl2 > > NaCl
(b) BaCl2 > NaCl > Sucrose
(c) NaCl > BaCl2 > Sucrose
(d) Equal of all
Ques. Which of the following shows highest magnetic moment ?
(a) N3+
(b) Cr3+
(c) Fe3+
(d) CO3+
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Ques. The molar enthalpy of fusion of water is 6.01 kJ mol–1. The entropy change of 1mol of water at its melting point will be
(a) 22 J mol–1
(b) 109 Jmol–1
(c) 44 J mol–1
(d) 24 J mol–1
Ques. Toluene can be oxidised to benzoic acid by
(a) KMNO3
(b) K2Cr2O7
(c) H2SO4
(d) Both (a) and (b)
Ques. The atom having a maximum number of unpaired electrons
(a) Cr
(b) Si
(c) P
(d) Ca
Ques. Which of the following pairs of liquids exhibits positive deviation from Raoult’s law?
(a) H2O – HCl
(b) H2O – HNO3
(c) CH3COCH3 – CHCl3
(d) C6H6 – CH3OH
Ques. Arrange the following compounds in order of increasing dipole moment
Toluene (I)
m-dichlorobenzene (II)
o-dichlorobenzene (III)
p-dichlorobenzene (IV)
(a) I < IV < II < III
(b) IV < I < II < III
(c) IV < I < III < II
(d) IV < II < I < III
Ques. Which of the following reactions is more appropriate than the remaining three for the preparation of pure primary amine?
(a) Reaction of NH3 with Grignard reagent
(b) Ammonolysis of alcohol
(c) Gabriel phthalimide reaction
(d) Ammonolysis of alkyl halide
Ques. How many gm of a dibasic acid (Mol. wt. = 200) should be present in 100 ml of its aqueous solution to given decinormal strength
(a) 1 gm
(b) 2 gm
(c) 10 gm
(d) 20 gm
Ques. Which of the following contains both polar and non-polar bonds
(a) NH4Cl
(b) HCN
(c) H2O2
(d) CH4
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Ques. Density of a FCC crystal is 10g/cm3 and the arm of cell is 100 Pm, then what will be the number of atoms in 100g atoms
(a) 3 x 1025
(b) 4 x 1025
(c) 1 x 1025
(d) 4 x 1031
Ques. Which of the following names is associated with the reaction involving formylation of benzene by using CO and HCl in the presence of anhydrous AlCl3?
(a) Friedel-Crafts aldehyde synthesis
(b) Gattermann-Koch aldehyde synthesis
(c) Friedel-Crafts formylation
(d) Gattermann formylation
Ques. The number of S – S bonds in sulphur trioxide trimer (S3O9) is
(a) Three
(b) Two
(c) One
(d) Zero
Ques. The oxidation state of molybdenum in its oxocomplex species [Mo2O4(C2H4)2)(H2O)2]2– is
(a) +2
(b) +3
(c) +4
(d) +5
Ques. At 100°C and 1 atm, if the density of liquid water is 1.0 g cm–3 and that of water vapour is 0.0006 g cm–3, then the volume occupied by water molecules in 1 litre of steam at that temperature is
(a) 6 cm3
(b) 60 cm3
(c) 0.6 cm3
(d) 0.06 cm3
Ques. The geometry and the type of hybrid orbital present about the central atom in BF3 is
(a) Linear, sp
(b) Trigonal planar, sp2
(c) Tetrahedral, sp3
(d) Pyramidal, sp3
Ques. 100 gram silver gets precipitated when 19 ampere electric current is passed for 15 minutes through a AgNO3 solution taken in a container. What should be the value of electrochemical equivalent of Ag?
(a) 11.1
(b) 1.11
(c) 0.0111
(d) 111
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Ques. The weight of 1 x 1022 molecules of CuSO4.5H2O is
(a) 41.59 g
(b) 415.9 g
(c) 4.159 g
(d) None of these
Ques. 3/4 part of a radioactive element disintegrates in 2 hours, then its half-life will be
(a) 1 hour
(b) 45 minutes
(c) 30 minutes
(d) 15 minutes
Ques. A silver coin weighing 11.34 g was dissolved in nitric acid. When sodium chloride was added to the solution all the silver (present as AgNO3) was precipitated as silver chloride. The weight of the precipitated silver chloride was 14.35 g. Calculate the percentage of silver in the coin
(a) 4.8%
(b) 95.2%
(c) 90%
(d) 80%
Ques. Enzyme is
(a) A microorganism
(b) A protein
(c) A mold
(d) An inorganic compound
Ques. A gas on passing through a solution of ammonical AgNO3 does not form any precipitate but decolourise the alkaline KMnO4 solution on passing in it, the gas is
(a) C2H2
(b) C2H4
(c) C3H4
(d) C3H8
Ques. Which of the following forms an isomer of benzonitrile on reacting with aniline?
(a) HgCl2 + CS2
(b) Br2 + KOH
(c) CHCl3 + NaOH
(d) AgCN + KOH
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Ques. Which of the following processes is not associated with the reaction of aniline and benzyol chloride in the presence of alkali?
(a) Preparation of benzanilide
(b) Schotten-Baumann reaction
(c) Friedel-Crafts reaction
(d) Benzoylation
Ques. Decarboxylation of which of the following compounds does not from an aromatic hydrocarbon
(a) Benzoic acid
(b) Phthalic acid
(c) Salicylic acid
(d) p-Toluic acid
Ques. Alkanone forms a cyclic ketal on reacting with
(a) Ethanol
(b) Glycol
(c) Methanol
(d) Sorbitol
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Ques. According to Hardy-Schulze low, in order to coagulate a certain amount of a colloid, the amount of electrolyt used depends on
(a) Opposite charge on ion
(b) Size of ion
(c) Nature of ion
(d) Shape of ion
Ques. Which of the following reactions is exhibited by the simplest aromatic aldehyde as well as the simplest aliphatic aledhyde
(a) Reformatsky reaction
(b) Tischenko reaction
(c) Perkin’s reaction
(d) Knoevenagel reaction
Ques. Which of the following types of isomerism can be exhibited by all compounds possible from molecular formula C3H8O
[A] Chain isomerism
[B] Position isomerism
[C] Functional group isomerism
[D] Optical isomerism
(a) A and B
(b) B and C
(c) A and C
(d) B and D
Ques. Which of the following compounds is formed when the product formed by the reaction of benzene and phosgene in the presence of anhydrous AlCl3 is hydrolysed
(a) Benzyl chloride
(b) Benzaldehyde
(c) Benzoic acid
(d) Chlorobenzene
Ques. Phenol can be converted to salicylic acid by which of the following reactions
(a) Duff reaction
(b) Liebermann reaction
(c) Gatermann reaction
(d) Kolbe-Schmidt reaction
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Ques. Which of the following products is formed by the reaction of a secondary amine and henzenesulphonyl chloride?
(a) A dialkylsulphonamide
(b) An alkylsulphonamide
(c) Aniline
(d) A trialkylsulphonamide
Ques. Which one of the following molecules has a coordinate bond
(a) NH4Cl
(b) AlCl3
(c) NaCl
(d) Cl2
Ques. Carbamide is regarded as the monoamide of
(a) Cyanic acid
(b) Isocyanic acid
(c) Carbonic acid
(d) Carbamic acid
Ques. Let the solubility of an aqueous solution of Mg(OH)2 be x then its ksp is
(a) 4x3
(b) 108 x5
(c) 27 x4
(d) 9x
Ques. Which of the following products is obtained on ozonolysis of benzene?
(a) Methylglyoxal
(b) Ethanal
(c) Ethanedial
(d) All of the above
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Ques. A gas decolourises bromine water and on reacting with hydrogen bromide forms bromoethene and ethylidene bromide the gas is
(a) Propane
(b) Propene
(c) Ethene
(d) Ethyne
Ques. A catalyst is a substance which
(a) Increases the equilibrium concentration of the product
(b) Changes the equilibrium constant of the reaction
(c) Shortens the time to reach equilibrium
(d) Supplies energy to the reaction
Ques. In Wurtz reaction, the reagent used is
(a) Na
(b) Na / liquid NH3
(c) Na / dry ether
(d) Na / dry alcohol
Ques. The unit cell of a lattice
(a) Is body centred cube
(b) Has 3Na+ ions
(c) Has 4NaCl units
(d) Is electrically charged
Ques. Which one of the following pairs of solutions can we expect to be isotonic at the same temperature
(a) 0.1 M urea and 0.1 M NaCl
(b) 0.1 M urea and 0.2 MMgCl2
(c) 0.1 M NaCl and 0.1 M Na2SO4
(d) 0.1 M Ca(NO3)2 and 0.1 M Na2SO4