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

Ans. (c)

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

Ans. (a)

Ques. The mass of copper deposited from a solution of CuSO₄by 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

Ans. (b)

Ques. 1 L of N₂ combines with 3 L of H₂to form 2L of NH₃under 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

Ans. (d)

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

Ans. (b)

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

Ans. (b)

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

Ans. (d)

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) S_N2
(c) Ionic mechanism
(d) S_N1

Ans. (b)

Ques. Coagulating power is maximum in
(a) N_a⁺
(b) B_a⁺²(c) Al⁺³
(d) A_n⁺⁴

Ans. (d)

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

Ans. (b)

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

Ans. (a)

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 [K_b 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

Ans. (c)

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

Ans. (c)

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

Ans. (c)

Ques. Which of the following is expected to form colourless complex
(a) Ni²⁺
(b) Cu⁺
(c) Ti³⁺
(d) Fe³⁺

Ans. (b)

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

Ans. (a)

Ques. Molisch’s test is done for the detection of
(a) Alkyl halide
(b) Carbohydrate
(c) Alkaloid
(d) Fat

Ans. (b)

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

Ans. (d)

Ques. How many isomers are possible in [Co(en)₂Cl₂]
(a) 2
(b) 4
(c) 6
(d) 1

Ans. (b)

Ques. Which one in the following contains ionic as well as covalent bond?
(a) CCl
(b) HCl
(c) KCN
(d) KCl

Ans. (c)

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

Ans. (a)

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

Ans. (b)

Ques. Which of the following carboxylic acids cannot give Hell-Volhard-Zelinsky reaction?
(a) CH₃COOH
(b) HCOOH
(c) C₂H₅COOH
(d) C₄H₉COOH

Ans. (b)

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

Ans. (d)

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

Ans. (d)

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

Ans. (c)

Ques. Elements of which group form anions most readily ?
(a) Oxygen family
(b) Nitrogen group
(c) Halogens
(d) Alkali metals

Ans. (c)

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

Ans. (d)

Ques. Which of the following is not related to the colloids
(a) Dialysis
(b) Brownian motion
(c) Ultrafiltration
(d) Wavelength

Ans. (d)

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

Ans. (b)

Ques. A 0.001 molal solution of [Pt(NH₃)₄Cl₄)] in water had a freezing point depression of 0.0054^oC. If K_f 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]

Ans. (b)

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

Ans. (a)

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^–

Ans. (c)

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

Ans. (b)

Ques. How many isomers of C₅H₁₁OH will be primary alcohols
(a) 2
(b) 3
(c) 4
(d) 5

Ans. (c)

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

Ans. (d)

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

Ans. (c)

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

Ans. (a)

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

Ans. (b)

Ques. Which of the following substances adsorbs hydrogen gas most strongly?
(a) Activated charcoal
(b) Silica gel
(c) Platinum black
(d) Iron powder

Ans. (c)

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

Ans. (a)

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

Ans. (a)

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

Ans. (a)

Ques. The telluric helix was given by
(a) De Chan Courtois
(b) Newlands
(c) L. Meyer
(d) Mendeleeff

Ans. (a)

Ques. Which behaves both as a nucleophile and electrophile
(a) CH₃NH₂
(b) CH₃Cl
(c) CH₃CN
(d) CH₃OH

Ans. (c)

Ques. Volume strength of 1.5N H₂O₂ will be
(a) 8.4
(b) 4.6
(c) 3.0
(d) 8.0

Ans. (a)

Ques. In the modern periodic table, elements are arranged in
(a) Increasing mass
(b) Increasing volume
(c) Increasing atomic number
(d) Alphabetically

Ans. (c)

Ques. Which of the following is non-electrolyte
(a) NaCl
(b) CaCl₂(c) C₁₂H₂₂O₁₁(d) CH₃COOH

Ans. (c)

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

Ans. (b)

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

Ans. (d)

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

Ans. (d)

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

Ans. (a)

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

Ans. (b)

Ques. Which of the following shows highest magnetic moment ?
(a) N³⁺
(b) Cr³⁺(c) Fe³⁺
(d) CO³⁺

Ans. (c)

Related: Nervous system quiz

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

Ans. (a)

Ques. Toluene can be oxidised to benzoic acid by
(a) KMNO₃
(b) K₂Cr₂O₇(c) H₂SO₄
(d) Both (a) and (b)

Ans. (b)

Ques. The atom having a maximum number of unpaired electrons
(a) Cr
(b) Si
(c) P
(d) Ca

Ans. (a)

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

Ans. (d)

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

Ans. (b)

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

Ans. (c)

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

Ans. (a)

Ques. Which of the following contains both polar and non-polar bonds
(a) NH₄Cl
(b) HCN
(c) H₂O₂
(d) CH₄

Ans. (c)

Related: mole concept numericals

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

Ans. (d)

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

Ans. (b)

Ques. The number of S – S bonds in sulphur trioxide trimer (S₃O₉) is
(a) Three
(b) Two
(c) One
(d) Zero

Ans. (d)

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

Ans. (b)

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

Ans. (c)

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

Ans. (b)

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

Ans. (c)

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

Ans. (c)

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

Ans. (a)

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%

Ans. (b)

Ques. Enzyme is
(a) A microorganism
(b) A protein
(c) A mold
(d) An inorganic compound

Ans. (b)

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

Ans. (b)

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

Ans. (c)

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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

Ans. (c)

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

Ans. (c)

Ques. Alkanone forms a cyclic ketal on reacting with
(a) Ethanol
(b) Glycol
(c) Methanol
(d) Sorbitol

Ans. (b)

Related: electric field questions

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

Ans. (a)

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

Ans. (b)

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

Ans. (b)

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

Ans. (c)

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

Ans. (d)

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

Ans. (a)

Ques. Which one of the following molecules has a coordinate bond
(a) NH₄Cl
(b) AlCl₃
(c) NaCl
(d) Cl₂

Ans. (a)

Ques. Carbamide is regarded as the monoamide of
(a) Cyanic acid
(b) Isocyanic acid
(c) Carbonic acid
(d) Carbamic acid

Ans. (d)

Ques. Let the solubility of an aqueous solution of Mg(OH)₂ be x then its k_sp is
(a) 4x³(b) 108 x⁵(c) 27 x⁴(d) 9x

Ans. (a)

Ques. Which of the following products is obtained on ozonolysis of benzene?
(a) Methylglyoxal
(b) Ethanal
(c) Ethanedial
(d) All of the above

Ans. (c)

Related: enzymes quiz multiple choice

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

Ans. (d)

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

Ans. (c)

Ques. In Wurtz reaction, the reagent used is
(a) Na
(b) Na / liquid NH₃
(c) Na / dry ether
(d) Na / dry alcohol

Ans. (c)

Ques. The unit cell of a lattice
(a) Is body centred cube
(b) Has 3Na⁺ions
(c) Has 4NaCl units
(d) Is electrically charged

Ans. (c)

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

Ans. (d)

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